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HVAC Efficiency for Ohio Commercial Buildings

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The short answer

Fans, cooling and electric heat are roughly a third of commercial electricity use in Ohio's region — in EIA's 2018 survey of East North Central buildings, ventilation was 19%, cooling 10% and electric space heating 6% — and in offices nationally, ventilation alone was 28%. Start with operations: schedules that match occupancy, working economizers, ventilation matched to occupancy, and fans that don't run at full speed all day. Save equipment upgrades for end of life. In Ohio, summer cooling counts twice: it drives monthly demand charges, and on the hottest weekday afternoons it sets your capacity tag, worth about $120 per kW-year at 2026/27 prices.

For the controls platform that runs these schedules, see smart building controls. For monthly demand tactics beyond HVAC, see lowering peak demand charges; for how weather drives load, see weather and energy use; and for cutting the heat load that lighting adds, see LED retrofits.

Where HVAC shows up on an Ohio bill

Bill component How HVAC affects it When it matters most
Energy (kWh) Fan and compressor run-hours; electric heat All year; fans often run more hours than compressors
Monthly demand (kW) Compressor stages and fans starting together; electric resistance heat Summer afternoons and morning start-up; winter mornings in electrically heated buildings
Capacity tag Cooling load during PJM's summer peak hours Hot weekday afternoons, June–September
Gas bill Boilers, furnaces, rooftop gas heat Heating season

Electric space heating is a small share of electric use in the region; in buildings heated with gas, that cost sits on the gas bill instead. Converting to heat pumps moves heating load onto the electric bill — covered below.

Operations first: the low-cost list

Most HVAC waste in small and mid-size buildings is operational rather than mechanical. Work through these before pricing new equipment:

  • Schedules that match reality. Check every thermostat or controller schedule against actual occupancy, including weekends and holidays. Overrides left in "hold" are one of the most common causes of after-hours runtime.
  • Setpoint ranges. Set a deadband between heating and cooling so zones aren't fighting each other, and limit how far occupants can adjust.
  • Optimal start. Let controls start equipment only as early as needed to reach setpoint by opening, rather than at a fixed early hour.
  • Economizers. Ohio's spring and fall bring many hours of cool outdoor air that can replace compressor cooling. Economizers fail quietly — stuck dampers, failed sensors, wrong changeover settings — so test them each spring.
  • Ventilation matched to occupancy. Bringing in more outdoor air than codes require wastes heating and cooling energy; demand-controlled ventilation using CO₂ sensors adjusts airflow to the people actually present.
  • Simultaneous heating and cooling. Look for reheat running in summer or adjacent units heating and cooling at the same time.
  • Maintenance. Clean coils, change filters, check refrigerant charge and belts. Degraded equipment runs longer to deliver the same comfort.
  • Staggered starts. Bring rooftop units on in stages rather than all at once to avoid setting a morning demand peak.

For a walk-through version of this list, see the DIY energy checklist.

Upgrades that pay in Ohio

Variable-frequency drives (VFDs). For centrifugal fans and pumps, input power varies roughly with the cube of speed. The U.S. Department of Energy notes that reducing speed and flow by 20% can cut input power by about 50%. Supply fans, cooling tower fans and hydronic pumps that run at constant speed are prime candidates.

Rooftop unit replacement at end of life. The economic comparison is the incremental cost of a higher-efficiency unit versus a code-minimum replacement you'd buy anyway, not the full price of a new unit. Advanced rooftop controllers with variable-speed supply fans can also be added to units with years of life left.

Heat pumps. Cold-climate heat pumps now serve Ohio winters, but the economics depend on your local gas and electric prices and on how the system handles the coldest days. Watch for electric resistance backup heat, which can set a new winter demand peak and raise demand charges. Model both energy and demand before switching.

Energy recovery ventilation. Where large outdoor-air volumes are required — schools, gyms, labs, some healthcare spaces — recovering heat or cooling from exhaust air reduces conditioning load year-round.

Retro-commissioning. A systematic check of sequences, sensors and schedules often finds problems that equipment replacement wouldn't fix.

Summer peaks and the capacity tag

PJM's annual peaks fall on hot weekday afternoons, and your utility sets your capacity tag from your load during those hours. The tag takes effect the following June 1:

Summer Tag in effect Approx. cost per kW of tag
2026 June 2027 – May 2028 $121.71 per year
2027 June 2028 – May 2029 $118.63 per year

HVAC is usually the biggest controllable load in those hours. Common tactics on PJM peak-alert days:

  • Pre-cool the building in the morning, then let setpoints drift up 2–4°F during the peak window.
  • Limit the number of compressor stages that can run at once.
  • Cycle non-critical rooftop units or zones for short periods.
  • Reduce outdoor air to code minimum during the peak window.

Illustrative example: an office that trims 60 kW of cooling load during PJM's peak hours in summer 2027 lowers its tag for June 2028–May 2029 by 60 kW, worth about 60 × $118.63 = $7,118 that year. The saving reaches you directly on a capacity pass-through contract, or when your next fixed price is set. See capacity tags explained.

Funding HVAC work in 2026

  • No utility rebates. None of Ohio's investor-owned utilities offers business HVAC rebates in 2026.
  • Section 179D ended for projects beginning construction after June 30, 2026.
  • Depreciation. 100% first-year bonus depreciation is available for eligible property acquired after January 19, 2025. Confirm how your HVAC project is classified with a tax adviser.
  • Financing. C-PACE (for property owners in participating communities), equipment financing and energy-as-a-service. See funding upgrades without utility rebates.

Plan replacements before failure. An emergency replacement leaves no time to compare efficiency options or funding.

FAQ

What's the fastest way to cut HVAC energy costs in an Ohio building?

Fix schedules and overrides, verify economizers, and stagger morning start-ups. These cost little and address the most common sources of waste and demand peaks.

Are there HVAC rebates from Ohio utilities in 2026?

No. AEP Ohio, Duke Energy Ohio, AES Ohio and the FirstEnergy utilities don't currently offer business efficiency rebates, and the federal 179D deduction ended for projects beginning construction after June 30, 2026.

Do heat pumps make sense for Ohio commercial buildings?

They can, but compare operating cost using your own gas and electric prices, and check whether backup resistance heat will raise winter demand charges.

How does air conditioning affect my capacity tag?

Your tag is based on your load during PJM's summer peak hours, which are almost always hot weekday afternoons. Reducing cooling load in those hours lowers the next year's capacity cost.

Sources

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