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Merrick & Company appears to be the company behind the Building Design + Construction reference to energy-efficient HVAC and conservation goals. In the available Trane case study, Merrick was redesigning its headquarters as its existing lease neared expiration and treated HVAC efficiency as part of a broader sustainability, comfort and financial decision. The documented retrofit combined variable-air-volume equipment, variable-frequency drives, economizers, digital sensors and a building automation system. Trane reports that the project earned $37,000 in Xcel Energy rebates and that evaporative precoolers reduced electrical consumption by 15 to 20 percent, although the case study gives no measurement period or independent verification for that percentage.
The original BD+C page was not located, so Merrick is a reasoned identification rather than a confirmed match. The project still offers a useful commercial-building example: conservation targets are more likely to be met when equipment, controls, incentives, occupant comfort and measurement are planned together.
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Which company and project does this case describe?
The strongest match is Merrick & Company’s headquarters renovation described by Trane. The case study does not state a publication year, and the exact Building Design + Construction article named in the brief was not found. Readers should therefore treat Merrick as the likely subject, not as a conclusively verified identification.
Merrick was preparing to leave an existing facility when its lease approached expiration. Rather than treating the move as a simple equipment replacement, the company was redesigning its headquarters and setting performance, comfort and certification objectives at the same time. The project team listed by Trane included RNL Design as architect, Hyder Construction as general contractor, MountainAire Mechanical Heating & Cooling, LLC as mechanical contractor, and MKK Consulting Engineers, Inc. as mechanical design engineer.
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| Project detail | What the source reports |
|---|---|
| Company | Merrick & Company |
| Project trigger | Headquarters redesign as an existing lease neared expiration |
| Primary goals | Energy efficiency, employee comfort, LEED Commercial Interiors Silver and an Xcel Energy rebate |
| Core HVAC approach | Retrofitted penthouse VAV systems with drives, economizers, condensing units, boxes, sensors and controls |
| Reported incentive | $37,000 in Xcel Energy rebates, according to Trane |
| Reported energy effect | 15–20% lower electrical consumption from evaporative precooling, according to Trane |
| Certification status in the case study | LEED Silver application under review; Green Globes also being pursued |
Prices checked November 2026.
Why did energy efficiency matter to Merrick?
Efficiency was one part of a set of linked business requirements. Merrick wanted a workplace that supported employee comfort, intended to pursue LEED Commercial Interiors Silver, and sought an Xcel Energy incentive. The company also evaluated proposals by weighing cost against expected return, according to the case study. That framing matters because a high-efficiency component is not automatically a sound project: its value depends on how it performs in the building, how it affects comfort and maintenance, and whether available incentives improve the economics.
Mechanical design engineer Danielle Swarts summarized the company’s motivation in Trane’s account: “We believe in practicing what we preach regarding sustainability.” She also said, “If we could achieve LEED Silver, then we definitely wanted to do that.” Those comments connect the HVAC decision to Merrick’s stated sustainability identity, but they do not prove that a certification was ultimately awarded.
What HVAC equipment and controls were installed?
The documented work was an integrated retrofit of penthouse variable-air-volume, or VAV, systems. A VAV system varies the amount of conditioned air delivered to zones rather than supplying a constant volume everywhere. That approach can reduce fan and conditioning energy when zones need less capacity, provided that controls, ventilation rates and minimum-air settings are properly configured.
Trane identifies the following project elements:
- Retrofitted penthouse VAV systems.
- Fan motors and variable-frequency drives, including TR200 drives.
- Economizer dampers for using suitable outdoor air for cooling.
- Direct-expansion (DX) condensing units.
- VAV terminal boxes serving individual zones.
- Digital sensors.
- Tracer Summit and Tracer SC controls.
- A building automation system (BAS) coordinating equipment and operating conditions.
- Evaporative precoolers that lowered the air temperature entering the condenser.
This list describes Merrick’s project; it is not a specification for every office or a recommendation to select a particular manufacturer. Existing ductwork, climate, envelope performance, electrical capacity, ventilation requirements and heating loads can make another solution more appropriate.
How can the combination of VAV, drives and controls reduce energy use?
Variable-frequency drives let supply fans slow when zone demand falls. Because fan power can drop sharply as speed is reduced, a properly commissioned variable-air-volume system may use substantially less electricity during part-load operation than a constant-speed arrangement. The actual saving depends on the fan curve, static-pressure setpoints, duct design, occupancy pattern and control sequence.
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Economizer dampers can provide “free cooling” when outdoor conditions are cool and dry enough, reducing compressor runtime. Digital sensors give the BAS information about temperature and other operating conditions, while the control platform can coordinate schedules, setpoints, fan speeds and equipment staging. These measures only deliver their intended benefit when sensors are calibrated, dampers move correctly and sequences prevent simultaneous heating and cooling.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe project’s controls therefore matter as much as its nameplate equipment. A BAS can expose schedules, alarms and trends that help operators identify a stuck damper, a drifting sensor or equipment that runs outside occupied hours. The U.S. General Services Administration’s building energy security and efficiency resource describes controls and energy analytics as tools for monitoring and managing building loads. GSA also lists other building-specific options, such as heat pumps, variable-refrigerant-flow systems and geothermal systems; those examples are context, not components reported at Merrick.
What did evaporative precooling contribute?
Evaporative precoolers lower the temperature of air entering an air-cooled condenser by evaporating water into the airstream. Cooler entering air can reduce condensing pressure and compressor work, particularly during hot outdoor conditions. Water quality, climate, humidity, maintenance and acceptable operating limits all affect whether the approach is practical.
Trane says the Merrick precoolers cut electrical consumption by 15 to 20 percent. That is a vendor-reported project figure, not an independently verified result in the available material. The case study does not state the baseline, monitoring period, weather-normalization method, affected equipment, or whether the percentage applies to the whole building or a defined part of the HVAC system. It should be used as a reported outcome from this project, not as a guaranteed saving for another building.
How much did the project save through incentives?
Trane reports that Merrick received $37,000 in Xcel Energy rebates for the equipment and controls. The source does not provide the incentive program’s calculation, the project’s total installed cost, or a simple payback period. Consequently, the rebate cannot be converted into a return-on-investment claim without additional project records.
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For a new retrofit, an owner should confirm incentive eligibility before ordering equipment. Utilities commonly require preapproval, baseline information, approved-equipment details, commissioning evidence or post-installation documentation. Requirements vary by service territory and program year. A contractor or engineer can help assemble the application, but the utility’s current rules control whether a payment is available.
Did Merrick achieve LEED Silver or Green Globes certification?
The case study says Merrick designed the building to achieve LEED Commercial Interiors Silver and that its application was under review by the Green Building Certification Institute. It also says the company was pursuing a Green Globes rating. Those statements describe goals and status at the time of publication; they do not establish that either certification was ultimately awarded.
Certification and energy performance are related but different questions. LEED or Green Globes documentation can recognize design, materials, indoor environmental quality, commissioning and other criteria, while utility bills and calibrated measurement establish how a building actually operates. An owner should report an application, a review, and an awarded certification separately.
How should another company evaluate a similar HVAC retrofit?
Merrick’s example is most useful as a decision process. Owners can use the following sequence before selecting equipment.
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- Document the existing system. Identify air-handling and rooftop equipment, VAV boxes, fan motors, controls, sensors, schedules, economizers, heating sources and electrical constraints. Trend temperatures, pressures, runtimes and faults where data is available.
- Establish a defensible baseline. Gather utility bills and operating data for a representative period. Note weather, occupancy changes and unusual events so future savings are not confused with unrelated variation.
- Model options against loads. Compare control upgrades, fan drives, economizers, heat-recovery or heat-pump options, replacement equipment and envelope improvements. Size equipment for actual loads rather than relying on old nameplate capacity.
- Calculate cost and return. Include design, controls integration, electrical work, water treatment where applicable, commissioning, maintenance and downtime. Subtract only incentives for which the utility confirms eligibility.
- Design the control sequence. Specify occupied and unoccupied schedules, outdoor-air logic, static-pressure reset, temperature setpoints, staging, alarm thresholds and override permissions. Write sequences clearly enough for the controls contractor and commissioning provider to verify.
- Plan commissioning and measurement. Test sensors, dampers, drives, safeties, terminal boxes and sequences under different loads. Define what will be measured, for how long, and who will review trends after occupancy.
- Coordinate certification paperwork. If LEED or Green Globes is a goal, map HVAC, controls, ventilation and commissioning evidence to the rating system before construction, then track submittals and final status.
This workflow prevents a common mistake: judging a retrofit solely by the efficiency rating of a piece of equipment. A modest equipment upgrade with reliable controls and commissioning can outperform a more efficient unit that is poorly integrated or left at incorrect setpoints.
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What should owners compare between projects?
There is no universal “best” commercial HVAC package. The relevant comparison axes are the building’s climate and envelope, required heating and cooling loads, existing distribution system, ventilation and comfort needs, capital cost, expected return, utility incentives, commissioning plan, measurement method and certification target.
Other published case studies show why project context matters. A Daikin Applied account of Moseley Architects describes a rooftop-system solution for a historic warehouse renovation, while a Nortek Air Solutions case study of Delta Dental of Michigan covers custom packaged rooftop systems for an expanded headquarters. Their equipment and results belong to those projects, not Merrick’s, but they illustrate why a solution that works in one renovation cannot be copied without checking loads, architecture and operating requirements.
What are the evidence limits of the Merrick case study?
The source is a vendor case study and gives no publication year. Its $37,000 rebate and 15–20% electrical-consumption figure are attributed to Trane. The source does not identify an independent verifier, measurement period, baseline, total project cost or payback calculation. It also does not confirm the final outcome of the LEED or Green Globes pursuits.
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What is the practical takeaway for facility and construction teams?
Merrick’s project shows that conservation goals become actionable when they are translated into system design, controls, financial analysis and verification requirements. Start with the building’s loads and operating patterns, then select equipment and control sequences that can be commissioned and monitored. Treat incentives as a design input, not as guaranteed revenue, and publish energy results with a clear baseline and measurement period.
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Frequently Asked Questions
Is a 15–20% HVAC electricity reduction guaranteed for another office building?
No. The 15–20% figure is Trane’s report for Merrick’s evaporative precooling and lacks a stated measurement period or independent verification. Climate, humidity, condenser design, operating hours, maintenance and the chosen baseline can produce very different results elsewhere.
What records should a company keep to prove an HVAC retrofit’s savings?
Keep pre- and post-project utility data, weather and occupancy information, equipment schedules, control trends, commissioning checklists and maintenance records. Document the calculation method and any utility inspection or incentive approval so the result can be reproduced.
Can a rebate be counted as part of an HVAC project’s payback?
Yes, if the utility confirms the incentive and its conditions, but the rebate should be shown separately from operating savings. Merrick’s case study reports $37,000 from Xcel Energy without stating project cost or payback, so those figures cannot be calculated from the source alone.
What is the difference between pursuing LEED and proving energy performance?
LEED is a certification process covering multiple building and design criteria, while energy performance is demonstrated through measured operation against a defined baseline. A project can pursue a rating and still need separate utility and commissioning evidence to substantiate energy claims.
