Protecting Your Mechanical Assets: Life-Cycle Planning and Predictive Maintenance
We all know that construction costs have risen over the years, and the capital needed to build or replace mechanical equipment is not a decision to be taken lightly. Understanding the Life Cycle Cost of a building’s mechanical system is an important component to assist in making decisions that will impact the facility budget for the next 20 years. Reviewing multiple mechanical solutions with a life-cycle cost analysis (LCCA) lays the foundation for smarter budgeting and better long-term value. This allows facility owners to understand the upfront construction cost as well as the operational costs for each system and make more informed decisions in the early stages of the project. Operational costs include not only energy costs but also maintenance costs. Maintenance costs include the routine maintenance activities recommended by the manufacturer, including filter changes, grease/oil for moving parts, etc., to maintain your warranty. Other maintenance activities include routine updates to Temperature Control software and training facility staff on operations. So what, basic stuff right? Well, let’s take that one step further and consider asset protection and Predictive Maintenance (PdM). Predictive Maintenance is a data-driven approach to improve efficiency and extend the life of the equipment by predicting failures based on data. With the correct data collection devices installed and set up for trending, building management software systems can predict when equipment is not performing and detect early deterioration/failure. Why does this matter? If early deterioration can be predicted before full failure, then maintenance/replacement costs will be lower, energy efficiency can be optimized, downtime can be minimized, and you will be able to plan your next outage instead of dealing with an emergency on the weekend. During the design phase, discuss with the engineer what data needs to be captured, which points should be trended/stored, and how to use this information. If your facility is already built, it’s never too late to start PdM for asset protection. Measuring and data collection devices can be installed post construction along with modifications to programming to capture the information in an impactful manner. 360 Engineering would love to work with you on your next project, or provide a detailed assessment of your current facility and operations to help plan improvements for optimization and long-term asset protection. Contact us to get started.
Summer School Construction Starts Long Before Summer
Summer K-12 projects move at a pace that’s hard to appreciate until you have lived through one. For these construction projects, summer may be when the work is most visible, but successful projects begin months earlier. With fewer than 70 days between the last day of school and the first day back, there is little room for surprises. In just a few months, you are coordinating design, procurement, construction, inspections and closeout, all while working toward a deadline that simply cannot move. Faculty and students are coming back, and the building must be ready. Every design decision, procurement milestone, submittal, and field coordination meeting must keep the project moving toward that final completion and turnover. That’s why design-build has proven to be such an effective delivery method for school renovations. Instead of designers and contractors working sequentially, the entire team collaborates from the beginning to identify challenges, evaluate options, and make informed decisions before construction begins. By the time summer arrives, we are not reacting to the project. We have already built the relationships and shared understanding needed to execute it efficiently. That early involvement sets the entire team up for success. From the engineering side, one of the biggest advantages is gaining an early understanding of existing building conditions. Older schools often contain undocumented renovations, aging infrastructure, or systems that don’t match the original drawings. Identifying those conditions early allows the design team to develop practical solutions that reduce risk during construction. A great example was the HVAC and plumbing improvements at Denver Public Schools’ Amesse Elementary. Early in the project, the 360 Engineering team worked alongside HPM Contracting and the mechanical and plumbing subcontractors to investigate the existing building systems through site observations and field testing. That collaborative effort uncovered conditions that were not apparent from the available drawings and allowed the team to refine the project scope before design was finalized. Rather than reacting to unforeseen issues during construction, the team addressed them proactively, helping maintain both the schedule and budget. That level of collaboration continues throughout design. Weekly coordination meetings keep the owner, contractor, designers, and trade partners aligned, but equally important are the conversations between meetings, walking the site together, reviewing details in real time, and quickly resolving questions before they become schedule impacts. When decisions are measured in days instead of weeks, accessibility and trust become just as important as technical expertise. Design-build also creates opportunities to improve the project beyond the original concept. On one recent school renovation, early design coordination identified that a proposed lighting layout would have required extensive relocation of fire alarm and fire suppression systems. By working together before construction, the team adjusted the design to avoid unnecessary work while still meeting the owner’s goals, saving both time and cost. Fast-track summer projects will always present challenges. Existing conditions change, priorities evolve, and unexpected issues arise. The difference is having a team that plans ahead, communicates openly, and focuses on solving problems together. When designers, builders, owners, and trade partners work as one team from day one, schools receive projects that are thoughtfully designed, efficiently constructed, and ready to welcome students back on schedule. Thinking ahead to your next school renovation? Early collaboration is the key to staying on schedule and avoiding costly surprises. Contact us to learn how our team can help your next K–12 project succeed from planning through construction.
Engineering Justice: The Hidden Role of Mechanical and Plumbing Systems in Secure Facilities
Justice facilities, like courthouses, detention centers, and police stations, are very different from typical buildings. They must operate 24/7 while balancing safety, security, and humane conditions for everyone inside. Behind the scenes, mechanical and plumbing systems play a critical role in making that happen. One Building, Many Uses Justice facilities aren’t just one type of space; they combine courtrooms, offices, public areas, and secure holding spaces. Each of these has different schedules, occupancy levels, and security needs. To support this, building systems must carefully control airflow, temperature, and ventilation across different zones, often simultaneously. Built for Safety and Security Many system design choices directly impact safety: Clean, well-filtered air helps protect occupants Pressure control prevents contamination between spaces Specialized features, like security vents and anti-ligature fixtures, reduce risk Even something as simple as airflow direction can help limit hazards or maintain control in secure areas. Managing Airflow in High-Risk Spaces Certain rooms, such as holding cells, evidence storage areas, and gun-cleaning rooms, require specialized ventilation to safely remove contaminants. Some facilities may consider installing emergency exhaust systems in public spaces to quickly clear the air in the event of a chemical threat. To make all these systems work together, engineers must carefully balance air pressure throughout the building to ensure it is properly pressurized under all operating conditions. Always On: Planning for the Unexpected Because these facilities never close, reliability is critical. Systems are often designed with redundancy in mind and backups so operations can continue during: Equipment failures Extreme weather Power outages Emergency power systems and backup heating options help ensure that essential services always remain available. Efficiency Matters Running systems 24/7 can consume significant energy, so efficiency is a top priority. Design teams shall explore: Setting overall building energy goals to help develop energy-saving strategies High-efficiency heating and cooling systems such as geothermal or heat pumps Heat recovery options to reduce the impact from high exhaust loads. Water-saving strategies like low-flow fixtures or reuse systems These choices help reduce long-term costs while maintaining performance. Designed for the Long Run Durability and ease of maintenance are just as important as performance. Equipment must be: Reliable and easy to service Located for safe, practical access Compatible with available parts and local expertise Good design ensures systems stay operational without disrupting daily activities. The Bottom Line Mechanical and plumbing systems in justice facilities do much more than provide basic comfort; they quietly support safety, security, and daily operations. When thoughtfully designed, they help create environments that are not only functional and resilient but also safer and more humane for everyone inside. Whether you’re planning a new justice facility or modernizing an existing one, 360 Engineering can help develop mechanical and plumbing systems that support security, reliability, and occupant well-being. Reach out to our team to start a conversation about your next project. Explore some of our recent justice facility projects: Denver Police Department Station 5 Huerfano County Judicial Center
360 Engineering at ASHRAE: Top Takeaways for Owners and Architects
At this year’s Rocky Mountain Chapter ASHRAE Technical Conference, one message came through clearly: the future of building environments is being reshaped faster than ever. Centered around the theme “Healthy Buildings: Designing for Life,” the conference highlighted how building systems are evolving to meet new expectations for sustainability, occupant health, and long-term performance. For owners and architects, this isn’t just a technical shift – it’s a fundamental change in how buildings are conceived, designed, and operated. The conversations happening today will directly impact project decisions tomorrow. 1. Decarbonization is Driving Everything Across sessions, decarbonization emerged as the dominant force influencing HVAC design and infrastructure planning. From the transition to low-GWP refrigerants to the increasing adoption of electrified systems like heat pumps and electric swing tanks, the industry is moving steadily away from traditional fossil-fuel-based solutions. Heat pump domestic water heaters are a direct response to the call for a reduction in fossil-fuel-based equipment, and electric swing tanks maximize the overall effectiveness of these heat pump domestic water heaters. While additional mechanical space is required for a swing tank, the heat pump system is able to operate at higher efficiencies by allowing colder water to enter the heat pump while also storing warmer recirculation water. As the push towards decarbonization continues nationwide, owners must be prepared for additional mechanical space requirements. Plan ahead for that extra water tank! 2. Energy Efficiency and Incentives are Finally Aligning Another major theme was the growing alignment between energy efficiency strategies and financial incentives. Federal programs such as the Inflation Reduction Act (IRA) are making it more feasible to invest in high-performance HVAC systems and building upgrades. Technologies like ground source heat pumps, thermal energy storage, solar, and even standalone battery storage systems can qualify for tax credits or even direct cash payments through the IRS Elective Pay program. These credits are on top of the already more efficient mechanical systems that help reduce energy usage, providing even further benefits for installing energy efficient technologies. 3. Healthy Buildings Mean Smarter Air The concept of “healthy buildings” goes far beyond increasing ventilation rates. Sessions focused on optimizing airflow in labs, incorporating lessons learned from operating room design, and striking the right balance between indoor air quality (IAQ) and energy efficiency. The takeaway is clear: performance expectations are rising, particularly in high-stakes environments like healthcare, laboratories, and public buildings. Designers need to think holistically about airflow, safety, and efficiency – not treat them as competing priorities. Smarter design can achieve all three. 4. Technology is Reshaping HVAC Design From AI-driven system optimization to advanced analytics and smart controls, technology is rapidly transforming how buildings are designed and operated. What was once considered cutting-edge is quickly becoming standard practice. Buildings are no longer static systems – they’re dynamic, data-rich environments that can adapt and improve over time. Modern control systems can compile and analyze data to further improve the efficiency of the system, from calculating the optimal time to begin energizing mechanical systems to measuring space carbon dioxide levels and adjusting ventilation to reduce energy usage when it’s not needed. The key moving forward will be communication and relationships amongst designers, building owners, and operators to share resources and learning in order to effectively implement new technologies into both new and existing facilities. “The way we’ve always done it” can’t keep up anymore. 5. System Complexity is Increasing As buildings grow more advanced, so does the complexity of the systems that support them. High-density cooling requirements. particularly in data centers, are pushing the limits of traditional approaches. At the same time, tighter integration between electrical and mechanical systems is becoming essential. Electrification means larger building electrical loads and, therefore, larger electrical equipment sizes. This growing complexity also introduces challenges in heat rejection, system coordination, and overall design integration. Early collaboration between architects, engineers, and owners is more critical than ever. Decisions made in the early stages of design have a cascading impact on performance, cost, and constructability and should be carefully considered. 6. Reliability Still Matters Amid all the innovation, one theme grounded the conversation: reliability. Sessions emphasized a “back to basics” approach, highlighting the importance of designing systems that are not only efficient and advanced but also maintainable and dependable. Real-world case studies reinforced the risks of overcomplication and the value of proven design principles. New technologies are powerful, but they need to be implemented thoughtfully. Long-term success still depends on systems that operators can understand, maintain, and trust. Care should also be taken to improve operator knowledge on new technologies as systems are further developed and improved. What This Means for Owners For building owners, these trends point toward a shift in priorities: Focus on lifecycle cost rather than first cost Plan early for electrification and decarbonization Take advantage of incentives while they’re available Invest in flexible systems that can adapt over time The buildings that perform best in the future will be the ones designed with change in mind. What This Means for Architects Architects are increasingly at the center of these changes. System requirements are influencing spatial planning, coordination is happening earlier in the design process, and flexibility is becoming a critical design criterion. Expect larger and evolving mechanical system footprints – more mechanical and electrical space requirements Collaborate earlier and more closely with MEP teams Design spaces that allow for future system upgrades and changes Architecture is no longer just about form and function – it’s about enabling performance over time. Final Thoughts The HVAC and building design industry is moving quickly, but the direction is clear. Healthy, efficient, and intelligent buildings are no longer aspirational; they’re becoming the standard. Staying engaged with organizations like ASHRAE and keeping up with emerging best practices is essential for anyone involved in shaping the built environment. The future of building design isn’t just about keeping up – it’s about designing for life. If you’re evaluating decarbonization strategies, electrification, or high-performance HVAC solutions for an upcoming project, the 360 Engineering team is ready to help
Why Building System Upgrades Matter for Libraries and Community Spaces
Libraries are more than places to borrow books—they serve as community hubs that bring people together. They support lifelong learning by providing access to educational resources, technology, and digital tools for all ages. Libraries also host events, workshops, and programs that encourage creativity, skill-building, and social interaction. By offering welcoming spaces for connection and collaboration, libraries help strengthen communities and make knowledge accessible to everyone. As demand for technology grows, libraries need reliable mechanical and plumbing systems that can support computers, makerspaces, and learning environments. Aging infrastructure can limit a library’s ability to expand services, maintain comfort, and safely support new technologies, making upgrades critical to keeping libraries accessible, resilient, and future-ready community spaces. By providing energy-efficient systems that improve sustainability and reduce operating costs, and by serving as an example to the community, demonstrating how public buildings can responsibly use resources while maintaining comfortable, welcoming spaces. By incorporating efficient heating and cooling systems, and water-saving technologies, libraries model practical sustainability solutions that community members can learn from and apply in their own homes and workplaces. These visible investments show a commitment to environmental stewardship, reduce operating costs, and reinforce the library’s role as a trusted leader in promoting sustainable practices and community well-being. We see many jurisdictions leading by example, choosing high-efficiency systems or eliminating gas-fired equipment and opting for all-electric systems. Improved HVAC systems enhance comfort and indoor air quality by maintaining consistent temperatures, proper ventilation, and healthier air for visitors and staff. This is especially important in libraries, where people spend extended periods studying, working, and attending programs. Modern, energy-efficient systems use less energy while operating more effectively, reducing utility costs and minimizing maintenance needs over time. By reducing operating expenses, libraries can reallocate resources to programs, services, and community initiatives while providing a healthier, more comfortable environment. New systems can focus on acoustic comfort as well as temperature. Many new mechanical systems today can be designed to reduce the sound generated by the equipment more than most older systems did. They also allow for temperature control in individual spaces. Updated plumbing systems improve both health and accessibility by providing modern restrooms and fixtures that better serve people of all ages and abilities. Reliable, well-designed facilities support hygiene, comfort, and compliance with current accessibility standards, helping ensure that libraries remain inclusive community spaces. Water-efficient systems also support daily operations by reducing water consumption while maintaining dependable performance. Together, these improvements promote public health, environmental responsibility, and long-term operational sustainability. Mechanical and plumbing upgrades strengthen libraries as long-term community assets by ensuring buildings remain safe, reliable, and adaptable to changing needs. Modernized systems support evolving technology, flexible programming spaces, and improved comfort for visitors and staff, enabling libraries to remain vibrant community hubs. By investing in these improvements, communities help ensure their libraries remain resilient, sustainable, and capable of supporting future generations. Planning a new library, modernizing an existing facility, or preparing for future building needs? Our team brings broad experience in mechanical and plumbing system design that supports comfort, efficiency, flexibility, and long-term reliability. Connect with us to discuss how thoughtful infrastructure upgrades can help your library better serve its community.
What Makes Mechanical Design in Lab Environments Unique?
Laboratories are not typical buildings — and they should not be treated like typical mechanical projects. In a lab environment, HVAC systems do far more than maintain comfort. They protect occupants, preserve research integrity, and support complex processes. Airflow, pressurization, exhaust, redundancy, and controls all become mission-critical components of the building’s operation. That level of responsibility demands a different approach to design. Safety Drives the System In most buildings, ventilation is about comfort. In labs, it is about containment. Fume hoods, biosafety cabinets, specialty exhaust systems, and pressurization zones must function reliably and predictably. Air change rates are often higher, airflow relationships must remain stable, and failures can impact safety and operations — not just temperature. Designing these systems requires a deep understanding of airflow control, redundancy strategy, and code compliance. It’s not simply about sizing equipment — it’s about protecting people and processes. Precision and Flexibility Matter Lab facilities evolve. Equipment changes. Research programs shift. Loads fluctuate. Mechanical systems must be designed with: Capacity for future expansion Clear routing strategy Accessible infrastructure Thoughtful diversity assumptions We design lab systems that perform on Day One and adapt on Day Ten, Year Five, and beyond. Coordination is Critical Laboratory buildings demand tighter coordination than most project types. Between specialty gases, exhaust manifolds, process cooling, acid waste systems, and high air volumes, ceiling and shaft space can quickly become constrained. Early coordination and disciplined layout prevent costly rework during construction. Our team prioritizes proactive clash detection, controls integration, and stakeholder alignment from the beginning — not as an afterthought. Energy Efficiency Requires Expertise High air change rates and 100% exhaust systems can drive significant energy use. Implementing energy recovery and high-performance strategies in lab environments requires careful evaluation of contamination risk, code requirements, and lifecycle cost. We approach lab design with both safety and efficiency in mind — balancing performance with long-term operational responsibility. Why Experience Matters Mechanical design in labs is not an entry-level exercise. It requires: Strong understanding of ventilation safety strategies Experience with pressurization and control sequences Clear redundancy planning Practical constructability knowledge Close coordination with lab planners and stakeholders Our team brings that experience to every project. We understand the difference between designing a system that “works” and designing one that performs reliably under real-world conditions. Lab facilities represent significant investment — in infrastructure, research, and people. Mechanical systems must support that investment with precision, clarity, and long-term performance. That’s the standard we design to. Airflow schematics are essential for illustrating building pressurization relationships and confirming that life safety requirements are achieved. Fume hood airflow design must carefully balance safety and energy efficiency. Airflow that is too low may create a risk to laboratory users by failing to adequately capture and contain contaminated air within the hood. Conversely, airflow that is too high increases energy consumption and can disrupt airflow patterns, potentially reducing containment effectiveness while unnecessarily increasing operating costs. Source: https://new.marshallscientific.com/Labconco-342491001-4-Purifier-Cell-Logic-Class-I-p/342491001.htm Fume hoods are available in a wide range of configurations, and there is no single design that is appropriate for every application. Each installation requires careful consideration of airflow performance, control strategies, alarm systems, and user accessibility to ensure both safety and operational effectiveness. Mechanical design for laboratory environments requires a higher level of precision, coordination, and expertise than most building types. From ventilation safety and pressurization control to flexible infrastructure and energy performance, every system must be designed to support both the immediate needs of the research and the long-term reliability of the facility. When done well, mechanical systems operate seamlessly in the background—protecting occupants, preserving research integrity, and enabling the work that happens inside the lab. Planning a new laboratory or upgrading an existing facility? Our team brings deep experience in lab ventilation, controls, and infrastructure design to help ensure systems perform safely and reliably. Connect with us to start the conversation about your next project.
Five K-12 Mechanical Trends for 2026: Healthier Classrooms, Electrification & Net-Zero Pathways
K–12 school districts are rethinking HVAC system design not just as a utility expense, but as a cornerstone of healthy, resilient and sustainable learning environments. With heightened awareness of indoor air quality, energy costs, and climate goals, mechanical engineers and facility managers are embracing innovation that directly benefits students, staff, and communities. Here are five key HVAC trends shaping school projects this year and beyond. 1. Prioritizing Indoor Air Quality for Healthier Classrooms Healthier indoor environments remain top of mind. School HVAC designs are moving beyond basic ventilation code minimums to strategies that proactively control contaminants. Increased outside air ventilation, demand-controlled ventilation tied to CO₂ sensors, and high-efficiency filtration (MERV 13 and above) are now standard in many designs. Portable air cleaners and UV-C disinfection in air handlers are being integrated where budget and schedules allow. Significant innovations like gas-phase filtration systems, which remove volatile organic compounds (VOCs) and other pollutants directly from the air, are finding their place in mechanical designs as well. Districts are recognizing that reducing airborne exposures can improve attendance, cognitive performance and overall well-being for all building occupants. 2. Electrification and Heat Pump Adoption With rising pressure to reduce fossil fuel use and operating costs, electrification is gaining traction in K–12 HVAC systems. Electric heat pumps—especially variable-refrigerant-flow (VRF), water-source, and cold-climate models—are replacing traditional boilers and furnaces in many new and retrofit projects. These systems offer efficient heating and cooling year-round while lowering carbon emissions, especially when paired with clean energy sources. For many districts, incentives and utility rebates make electrification financially feasible, accelerating the transition away from fossil fuels. 3. Pathways to Net-Zero and Carbon-Neutral Schools Net-zero energy and carbon-neutral goals are no longer just aspirational. Districts are embedding these targets into long-term facility plans. HVAC systems play a central role—optimized building envelopes reduce loads, while high-efficiency mechanical systems minimize energy use. Paired with on-site renewable energy like solar photovoltaics and energy storage, HVAC design is a critical lever for meeting aggressive sustainability commitments. Lifecycle cost analysis and whole-building energy modeling are essential tools driving these decisions. 4. Smart Controls and Integrated Building Management Advanced controls are transforming how school HVAC systems operate. Smart equipment controllers, fault detection and diagnostics, and integrated building management systems (BMS) allow facility teams to monitor performance, anticipate maintenance needs and optimize energy use. Remote access and analytics improve responsiveness and help districts make data-driven adjustments, which is especially valuable across multiple campuses. 5. Resilience and Emergency Preparedness Finally, resilience is a growing priority. HVAC designs for schools increasingly consider extreme weather, power outages and public health emergencies. Backup power for critical ventilation systems, enhanced filtration during smoke events, and redundant equipment configurations help ensure comfort and safety no matter the challenge. Conclusion The HVAC trends emerging in 2026 reflect a holistic approach to school facilities—one that champions health, sustainability, and operational efficiency. By embracing these strategies, school districts can support better learning environments today while future-proofing their buildings for the challenges ahead.
Modernizing for Comfort and Sustainability: HVAC and Plumbing Renovation at the Colorado Annex Building
The State of Colorado Annex Building at 1313 Sherman Street has undergone a transformative renovation aimed at improving comfort, efficiency, and sustainability, thanks to the RATIO design team. This project focused on breathing new life into a historic structure, replacing outdated plumbing systems and modernizing HVAC infrastructure to meet today’s performance and environmental standards. Challenges of an Aging Infrastructure The Annex Building’s original design prioritized heating and ventilation, with cooling added later as an afterthought. This retrofit approach left the building with undersized ductwork and minimal ceiling space, creating significant design hurdles. Existing ducts embedded in floors had to be abandoned in place, and engineers faced the complex task of separating basement systems (serving 24/7 State Patrol operations) from the rest of the building while maintaining both the historic fabric as well as the integrity of existing fire ratings at every level. Another major challenge was decoupling domestic hot water from the existing steam system, which remained operational during and after construction to serve adjacent buildings sharing the existing distribution system. Moving water out of the basement and into upper floors required innovative solutions to overcome spatial and logistical constraints. Electrification and Sustainability Goals Central to the renovation is the commitment to sustainability. The project targets LEED Gold certification, emphasizing energy performance, water use reduction, and refrigerant management. Electrification of HVAC systems plays a pivotal role, aligning with Colorado’s broader environmental objectives. Several system options were evaluated, including: Variable Refrigerant Flow (VRF) Chilled Water/Hydronic Heat Variable Air Volume (VAV) Packaged Heat Pump RTUs Each option offered unique benefits and limitations. While heat pumps and energy recovery systems are essential for achieving LEED points, they introduce complexities in refrigerant management. VRF systems, for example, use significant volumes of refrigerant, making enhanced credits for low Global Warming Potential (GWP) refrigerants challenging with current technology. Balancing Performance and Practicality Budget constraints, operations and maintenance (O&M) staffing, and technology confidence were key factors influencing system selection. Electrification, while environmentally advantageous, can complicate energy performance scoring compared to traditional gas systems. High-efficiency heat pumps and advanced controls were necessary to bridge this gap. Maintenance considerations also shaped design decisions. Multiple system components increase potential failure points and require ongoing investment in replacement parts. Additionally, complex control sequences demand thorough training for maintenance staff to ensure reliable operation. Ultimately, based on these factors of first cost, energy efficiency, operability, and particularly constructability, the State chose to move forward with a VRF heat pump system with integral heat recovery. This all-electric system is highly efficient, as it allows the system to move heat internally from one zone to another, utilizing the heat energy already in the building as much as possible and minimizing how much the outdoor heat pump must work to draw heat from the ambient outside air for space heating or reject heat from the building to the outside for space cooling. Ventilation was provided by a packaged heat pump Dedicated Outdoor Air System (DOAS) with energy recovery. This DOAS provide fresh, filtered outside air to the entire building, simultaneously controlling building pressure to mitigate unwanted infiltration via exhaust air drawn from each level—and all while utilizing an energy recovery wheel to reduce the load on the heat pump heating/cooling system! Plumbing Design Innovations On the plumbing side, the renovation prioritizes water conservation and metering to support LEED goals. Strategies include reducing water use and implementing additional metering for better resource management. These upgrades not only enhance sustainability but also improve long-term operational efficiency. Looking Ahead The Annex Building renovation exemplifies the intersection of historic preservation and modern engineering. By addressing spatial limitations, embracing electrification, and pursuing LEED Gold certification, Colorado is setting a benchmark for sustainable government facilities. This project demonstrates that even the most challenging infrastructure can be transformed into a model of efficiency and environmental stewardship. Photography © Frank Ooms
Winterizing Heat Pump HVAC Systems: A Smart Guide for Commercial Buildings
As winter approaches, building owners and commercial service contractors must ensure that heat pump HVAC systems are ready to perform efficiently in colder conditions. Unlike traditional furnaces, heat pumps operate by transferring heat rather than generating it, making them highly efficient—but also sensitive to outdoor ambient conditions. Proper winter preparation not only protects your investment but also ensures occupant comfort and energy savings. Understand Your System’s Winter Behavior Heat pumps work by extracting heat from the outside air—even in cold weather. However, their efficiency can drop as temperatures fall, especially in older or improperly maintained systems. Cold climate heat pumps are designed to perform better in freezing conditions, but all systems benefit from seasonal maintenance. Key Steps to Prepare Your Heat Pump for Winter Schedule a Professional InspectionBefore the first frost, have a certified HVAC technician inspect the system. They’ll check refrigerant levels, electrical connections, defrost cycles, and thermostat calibration. Clean or Replace Air FiltersDirty filters restrict airflow, reducing efficiency and increasing wear. Replace filters monthly during peak heating season. Clear Outdoor UnitsRemove leaves, snow, and debris from around the outdoor unit. Ensure at least 2 feet of clearance for proper airflow and defrosting. If your units are not installed on stands to stay above snow line, be prepared to shovel out around them during periods of heavy snowfall! Check the Condensate DrainA clogged drain at the indoor unit coil can lead to water damage or ice buildup. Make sure it’s clear and draining properly. At the outdoor unit, be aware that moisture will also be released during defrost cycles, so you’ll want to ensure that drainage has somewhere to go that won’t damage the unit or any other building systems. Optimize Thermostat SettingsSet thermostats to maintain consistent temperatures. Avoid frequent adjustments, which can trigger inefficient auxiliary heating. Remember, and inform your occupants, that turning the thermostat setpoint way up does not heat your space any faster, but it could set you up to waste energy overheating the space if you forget to turn it back down! Inspect Insulation and SealingHeat loss through poorly insulated ducts or building envelopes forces the system to work harder. Seal leaks and upgrade insulation where needed. Enable Defrost ModeHeat pumps naturally accumulate frost in winter. Ensure the defrost cycle is functioning to prevent ice buildup that can damage the unit. Be aware as well that during the defrost cycle, the space will be without heat—typically for 10-15 minutes at most. If you have a critical space served by a heat pump, consider providing auxiliary heat to compensate during defrost cycles. Monitor Energy BillsKeep an eye on your electricity bills throughout the cold months, as a sudden jump in energy usage could be an indicator of an issue with your heat pump equipment. You can address issues quickly as they arise simply by understanding what your energy bill should look like and keeping track of it throughout the heating season. Cold Climate Considerations For buildings in colder regions, consider upgrading to a cold climate heat pump or adding supplemental heating. Dual-fuel systems, which combine a heat pump with a gas furnace, offer flexibility and efficiency. As noted above, make sure to include compensating auxiliary heat for defrost cycles if necessary, and keep the area around the outdoor unit clear of snow and debris to maximize unit performance and efficiency. Long-Term Benefits Winterizing your heat pump system reduces emergency repair risks, lowers energy bills, and extends equipment life. For engineers and contractors, specifying systems with winter readiness in mind—such as variable-speed compressors and smart thermostats—can enhance building performance and client satisfaction. Ready to prepare your building’s heat pump system for winter? Our team can help you assess your equipment, identify vulnerabilities, and optimize performance. Contact us to schedule a consultation or discuss your project needs. Contact Us
Sustainability Meets a New Era of Learning: Back to School at DPS RASA
Denver Public Schools (DPS) set a new standard with the Responsive Arts & STEAM Academy (RASA), a ground-up, 120,000-square-foot school designed and built in two phases. Phase 1 opened in August 2024 for ECE through 5th grade, followed by Phase 2 in August 2025, expanding the school through 8th grade. From the start, the project team planned ahead—accounting for future mechanical loads, water heater capacity, and even sanitary sewer piping depth—ensuring a seamless expansion. DLR Group led the architectural design, with 360 Engineering providing mechanical and plumbing engineering and consulting expertise. Energy Modeling and Mechanical Systems The design team was challenged to create a highly energy-efficient building. Energy modeling was used to evaluate three mechanical system options: Packaged Heat Pump Roof Top Units (RTUs) with downstream Variable Air Volume (VAV) boxes with electric zone heating A geothermal heat pump system Chilled beam cooling with radiant heating flooring With 360 Engineering’s input and guidance, the team compared installation cost, energy efficiency (measured in Energy Use Intensity, or EUI, given as a measure of energy use per square foot per year), maintenance needs, and long-term operating costs. The VAV RTU system emerged as the best fit—offering strong efficiency, the lowest upfront cost, and familiarity for DPS’s facilities staff. The system incorporates air-side economizers and energy recovery wheels to improve performance further, taking advantage of Colorado’s dry climate. Smart controls also monitor CO₂ levels in each space, adjusting outdoor air intake to strike the right balance between energy savings—less outdoor air to heat or cool—and indoor air quality, ensuring efficient operation while keeping classrooms filled with fresh air to support active, engaged learning. All Electric Designed with the future in mind, RASA is the district’s first all-electric school: heat pump technology powers the mechanical systems, domestic water heating is electric, and even the kitchen ranges and ovens are induction. Now, more than a year after RASA’s grand opening, with the Phase 2 expansion substantially complete, early performance data is beginning to prove the success of the design and construction efforts. While initial energy use reflects commissioning, ongoing construction, and partial occupancy, adjusted metrics show the building’s EUI in the low 30s—right on target with original energy modeling and well below Denver’s K–12 benchmark of 48.1. RASA stands as a safe, energy-efficient learning environment, ready to support and inspire the next generation. Contact us today to discover how an all-electric design can power your next project. E-mail Stacey Richardson at srichardson@360eng.com to learn more.