Ohio HVAC Pros
A thin tree branch covered in a layer of ice with small icicles hanging from it, photographed against a blurred winter background featuring a house and snow-covered shrubs.

Furnace Installation in Lancaster, OH

A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Fairfield County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An unfinished basement interior featuring a large metal furnace unit, exposed ceiling joists, concrete walls, and scattered boxes and cables on the floor.

Lancaster asks a lot of a furnace

Your furnace has work to do here from October through May. That is eight months a year, with winter nights averaging 24°F. Most homes in Fairfield County heat with gas, and a new furnace has to run that long and that cold without trouble.

The last ten years brought 13 winter storms and 81 damaging wind events to the area. Statewide, 18% of households went at least 24 hours without power in 2024. A new gas furnace has to meet the federal minimum of 80 percent AFUE, and where you land above that minimum is worth thinking through given how much this furnace will run.

8 months
October through May, your furnace is on duty
24°F
the average winter night it heats against
60%
of homes here heat with gas, so most furnaces here burn gas
80% AFUE
the federal minimum any new unit must meet
Isometric cutaway illustration of a single-story house showing interior rooms with furniture, overhead ducting, a flue pipe, and a furnace unit against an interior wall.
Your furnace works hardest from November through March.

NOAA nClimDiv, 1991–2020 normals

A gas furnace and sheet-metal air handler unit installed in an unfinished concrete basement.

A high-efficiency gas furnace would save about $130 a year to run in Fairfield County compared with a gas furnace.

  • A high-efficiency gas furnace$620 a year
  • A gas furnace$750 a year

Estimates for a typical Fairfield County home, from EIA household energy data, Ohio fuel prices and NOAA climate normals. Your home will differ.

In Ohio, HVAC licensing for homes is left to the counties.

Whether a contractor here is licensed depends on where in Fairfield County the house sits. Ohio leaves that decision to the counties instead of setting one state rule. Ohio does set a definition. A home contractor has to carry at least $250,000 in liability insurance. That is not a license and nobody is tested against it. It just means the business has that coverage on file.

For a furnace installation, the protection you have is the permit and inspection most local building offices require for this kind of job. Someone from the building office signs off on the work once it is done. That inspection is what stands between you and bad work here, not a state license. Most homes in Fairfield County heat with gas, this furnace among them.

Source: Ohio Legislative Service Commission

What size furnace does my house need?
The right size depends on your square footage, how well the house is insulated, your windows, and your ceiling height, so there is no single number that fits every home. A contractor will walk through and run a load calculation rather than sizing off square footage alone. A furnace that is too small will run constantly trying to keep up through the winter, while one too large will short cycle and wear out faster. Getting the size right the first time is worth the extra step.
How do I know it's time to replace my furnace?
Watch for repairs that keep coming back, a furnace that cannot hold a steady temperature, or one that is old enough that parts are getting harder to find. Homes here need heat from October through May, eight months of the year, so a furnace that is struggling has little time off to make up for it. If yours is cycling more than it used to, or a technician has told you the heat exchanger is cracked, those are signs to stop repairing and start planning a replacement.
Is a high-efficiency furnace worth it?
It depends on how long you plan to stay in the house and what you are paying to heat it now. Every non-weatherized gas furnace made since November 2015 has to reach at least 80 percent AFUE, so even a standard replacement today runs more efficiently than an older unit might. A high-efficiency model pulls more heat out of the same amount of fuel, and with eight months of heating season here that difference is felt on the gas bill every year. A contractor can look at your current furnace and your gas use and tell you whether the jump makes sense for your house.