Smart Building Controls for Small & Mid-Size Ohio Sites

The short answer

Most of what "smart" controls save in small and mid-size buildings comes from a short list: schedules that follow occupancy, locked setpoint ranges, staged start-ups, demand limiting, lighting controls, and alarms that catch equipment running when it shouldn't. In Ohio there's one more high-value automation: a peak-alert mode that trims load during PJM's summer peak hours, because those hours set your capacity tag — about $120 per kW-year at 2026/27 prices. You don't need a large-building automation system to do this; connected thermostats or rooftop-unit controllers, lighting controls and your utility's interval data cover most sites.

This page covers controls that act on equipment. For the software layer that collects meter and bill data and reports on it, see energy management software. For HVAC operating details, see HVAC efficiency; for the full summer peak-hour playbook, see the PLC operations guide.

What to automate first

Automation	What it does	What it saves
Occupancy schedules and holiday calendars	Runs HVAC and lighting only when the building is in use	kWh
Override timeouts	Returns a zone to schedule after a temporary override	kWh
Setpoint limits and deadbands	Stops occupants from pushing setpoints to extremes and keeps heating and cooling from overlapping	kWh
Optimal start and stop	Starts equipment only as early as needed to hit setpoint by opening	kWh, morning demand
Staged start-up	Brings rooftop units, compressors and process loads on in sequence	Monthly demand
Demand limiting	Sheds deferrable loads — water heaters, some HVAC stages, EV chargers — as demand nears a set limit	Monthly demand
Economizer and ventilation control	Uses outdoor air for free cooling; adjusts outdoor air to occupancy with CO₂ sensors	kWh
Lighting controls	Occupancy sensing, daylight dimming, exterior photocells and schedules	kWh, demand
Fault alarms	Flags after-hours runtime, simultaneous heating and cooling, stuck dampers, short-cycling	kWh, repairs
Peak-alert mode	Runs a pre-set load-reduction sequence during PJM summer peak hours	Capacity tag

Start with schedules, overrides and staged starts. They cost almost nothing to program and address the most common problems. Add demand limiting and peak-alert mode once you've seen your interval data.

Matching the system to the building

Building	Typical control platform	Data
Small (a few rooftop units, one or two floors)	Connected thermostats or rooftop-unit controllers with a cloud dashboard; networked lighting controls	Utility interval data
Mid-size (multiple zones, central plant or many rooftop units)	Building automation system (BAS) using open protocols such as BACnet	Utility interval data plus submeters on major loads
Multi-site portfolio	Standardized controllers and schedules across sites, managed centrally	Interval data for every account; see portfolio analytics

These are rough categories, not thresholds. A small building with a large process load may need more than thermostats, and a mid-size building with good rooftop controllers may not need a full BAS.

Interval data: the feedback loop

If your account has a smart or interval meter, your utility records usage in short intervals, typically 15 minutes. Twelve months of that data tells you whether your controls are working. Look for:

• Overnight and weekend baseload. If the building uses nearly as much at 2 a.m. as at 2 p.m., schedules or overrides aren't working.
• Morning spikes. A sharp peak at opening points to equipment starting all at once.
• Peak days. Compare your load on the hottest weekday afternoons of last summer with an ordinary day — that's the load setting your capacity tag.
• Drift. A slow rise in baseload over months often means an override, a failed sensor or equipment left in manual mode.

For how to get interval data from Ohio utilities, see Ohio energy data analytics. Add submeters where a single load — a chiller, compressor or kitchen line — dominates and you need to see it separately.

Peak-alert automation for capacity tags

Your capacity tag is based on your load during a handful of PJM summer peak hours, usually on the hottest weekday afternoons. A controls system can reduce load in those hours automatically once someone tells it a peak is likely.

How it works:

1. Get the signal. Sources include PJM's hot-weather alerts and the peak-day forecasts many suppliers, brokers and demand-response providers send to customers during June–September.
2. Trigger peak mode. An operator presses one button, or the platform switches automatically on an alert.
3. Run a pre-set sequence. Pre-cool before the peak window; raise cooling setpoints 2–4°F during it; limit compressor stages; dim lights in daylight zones; pause EV charging and deferrable process loads.
4. Return to normal. Recover gradually so the building doesn't create a new peak right after the window.
5. Log it. Record what ran and compare the interval data with a normal day.

Test the sequence in June, before the hottest weeks. Keep life-safety systems, refrigeration setpoints and critical processes out of the sequence.

Illustrative value: a building that consistently trims 40 kW during PJM's peak hours in summer 2027 lowers its tag for June 2028–May 2029 by 40 kW, worth about 40 × $118.63 = $4,745 that year at the 2028/29 capacity price. You capture it directly on a capacity pass-through contract, or when your next fixed price is set. See capacity tags explained.

Buying and running controls well

• Open protocols and data ownership. Choose equipment that uses open protocols such as BACnet or Modbus, and make sure you can export your own trend data if you change vendors.
• Cybersecurity. Put building controls on a separate network, control vendor remote access, and change default passwords.
• Commissioning and training. Verify that sequences work as designed at installation, and train whoever will actually operate the system. Most controls savings erode through overrides, not equipment failure.
• Document the sequences. Write down schedules, setpoints, demand limits and the peak-alert sequence so they survive staff turnover.

Paying for it. Ohio utilities don't offer business rebates for controls in 2026, and the federal 179D deduction ended for projects beginning construction after June 30, 2026. Controls upgrades are usually funded from operating budgets, equipment financing, energy-as-a-service agreements, or C-PACE for property owners — see funding upgrades without utility rebates.

FAQ

Does a small business need a building automation system?

Usually not. Connected thermostats or rooftop-unit controllers, lighting controls and utility interval data handle schedules, setpoint limits, staged starts and peak alerts for most small buildings.

What should I automate first?

Schedules, override timeouts and staged start-ups. They cost little, cut after-hours runtime, and lower the morning demand peak.

How can smart controls lower my capacity tag?

By running a pre-set load-reduction sequence during PJM's summer peak hours, which set next year's tag. Each kW removed is worth about $120 a year at 2026/27 prices.

Are there Ohio rebates for smart building controls?

No utility rebates are available for business controls in 2026. Financing, energy-as-a-service and C-PACE are the main funding tools.

Sources

• PJM capacity market (RPM): https://www.pjm.com/markets-and-operations/rpm