Furnace Installation in Dayton, OH
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Montgomery County will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat a year, in a county that loses power
Montgomery County needs a working furnace from October through May. Winter nights average 24°F, so whatever goes in has to carry the house through a long, cold stretch, not just a few hard weeks.
Most homes here heat with gas, and any new non-weatherized gas furnace has to reach at least 80 percent AFUE under the federal minimum. The area has logged 8 winter storms and 188 damaging wind events over the past ten years, and in 2024, 18 percent of Ohio households went at least a day without power. A furnace that comes back on by itself once the power returns matters here.
- 8 months
- October through May, your furnace is on duty
- 24°F
- the average winter night it heats against
- 63%
- of homes here heat with gas, so most furnaces here burn gas
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
A high-efficiency gas furnace would save about $130 a year to run in Montgomery County compared with a gas furnace.
Estimates for a typical Montgomery 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 needs a license here depends on where in Montgomery County the house sits. Ohio leaves that decision to the counties. What Ohio does set is a definition. A home contractor is expected to carry at least $250,000 in liability insurance. That is not a license and nobody is tested against it. It just sets a floor for what counts as a legitimate contractor under state law.
For a furnace installation, the protection that matters here is the permit. Most cities and counties in Ohio require a permit for a furnace replacement and an inspection once it is in. That inspection is what catches a bad gas connection or a venting mistake before it becomes dangerous. In Montgomery County, 63.3% of homes heat with gas, so that inspection is doing real work.
Source: Ohio Legislative Service Commission
- What size furnace does my house need?
- It depends on a load calculation, not just the square footage of your house. A contractor will look at your insulation, your windows, your ceiling height, and how the house is laid out before landing on a number. Guessing high seems safe but it isn't. A furnace that's too big cycles on and off fast, which wears out parts sooner and leaves rooms uneven. With heat needed here October through May, getting the size right matters more than it would somewhere with a short winter.
- How do I know it's time to replace my furnace?
- Watch for repairs that keep coming back, a furnace that struggles to keep up on the coldest nights, or a system old enough that parts are getting hard to find. If you're calling for service every winter, replacing it usually costs less over time than patching it again. A furnace that short cycles, makes new noises, or leaves some rooms cold while others are fine is also telling you something. With winter lows here averaging 24°F, a furnace that's falling behind now will fall further behind as it ages.
- Is a high-efficiency furnace worth it?
- For a house here, heating from October through May, a high-efficiency furnace has more months to earn back the difference than it would somewhere with a shorter winter. Any non-weatherized gas furnace made since November 2015 has to reach at least 80 percent AFUE, so even a standard model isn't wasteful. High-efficiency models push past that number, which matters most in a house that runs its furnace eight months of the year. A contractor can walk through what that difference looks like for your specific house.