Winter Energy Efficiency Checklist for Small Businesses
Heating typically drives the biggest winter energy increase for a small business, especially in older buildings or spaces with frequent door traffic to the outside. Sealing drafts, servicing HVAC equipment, setting back the thermostat during closed hours, and switching to LED lighting for the shorter days are the highest-impact, lowest-cost moves before the cold sets in.
Before the cold hits
A quick HVAC service call — filter replacement, coil check, thermostat calibration — before the heating season starts is one of the cheapest ways to avoid an inefficient system running hard all winter. Weatherstripping and door sweeps on exterior doors, caulking visible gaps around windows, and checking that any loading dock or storage area doors seal fully all reduce the amount of heated air a building loses.
Programmable and smart thermostats
Setting the thermostat back during closed hours — nights, weekends, whatever the business's actual schedule is — cuts heating costs without anyone noticing a difference during business hours, as long as the system has time to recover the temperature before opening. A programmable or smart thermostat automates this instead of relying on someone remembering to adjust it manually each night.
Lighting for shorter days
Shorter daylight hours mean lights run longer each day through the winter months. Switching remaining incandescent or older fluorescent fixtures to LEDs, and adding occupancy sensors in storage rooms, restrooms, and other intermittently used spaces, trims that increase without changing how the space is used.
Space-specific checks
Retail and office spaces benefit from closing off unused rooms and confirming vents aren't blocked by furniture or displays. Restaurants and other kitchen-heavy businesses should check exhaust hood dampers close properly when not in use, since an open damper can pull heated air straight outside. Warehouses and industrial spaces often lose the most heat through loading dock doors and should prioritize dock seals and strip curtains.
What this means for your bill
Most of these fixes pay for themselves within one heating season, and several — thermostat setbacks, sealing obvious drafts — cost nothing beyond a bit of time. Tracking usage month over month makes it easier to tell whether a given fix actually moved the needle versus whether a mild or harsh winter is driving the change.
Frequently asked questions
What raises a small business's energy bill most in winter?
Heating is usually the biggest driver, especially in buildings with older HVAC systems, poor insulation, or doors that open frequently to the outside. Extended lighting hours from shorter days add a smaller but real increase too.
Is it worth sealing drafts in a leased commercial space?
Usually yes — weatherstripping, door sweeps, and caulk around windows are inexpensive, don't require landlord approval in most leases, and can meaningfully reduce heat loss even in a space you don't own.
Should a business turn the heat down overnight?
Setting back the thermostat during closed hours is one of the more reliable ways to cut winter heating costs, as long as the setback isn't so deep that the system uses excess energy to recover a very cold space each morning.
See this on your own bill
Upload your business's winter bill and Certo reads it for you — a free bill health score and a plain-English breakdown of where the money's going.
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