Furnace Installation in Clarksville, TN
A new furnace here will run from October through April 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.
Clarksville furnaces run seven months a year
October through April, your furnace is what stands between the house and the cold. Winter nights here average 30°F, and it has to hold up through seven months of that kind of use every year.
Most homes in Montgomery County heat with electricity, and the power here does not always stay on. Tennessee logged 13 winter storms and 103 damaging wind events over the last ten years, and in 2024, 20 percent of households in the state went at least 24 hours without power. A furnace should come back on by itself once the power does, no relighting needed. Any new gas furnace installed also has to meet the federal minimum of 80 percent AFUE, so whatever goes in will already be built to that standard.
- 7 months
- October through April, your furnace is on duty
- 30°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
- What size furnace does my house need?
- The right size comes from a load calculation, not the square footage of your house alone. A contractor will look at your insulation, your windows, your ceiling height, and how the place is laid out before landing on a number. Going bigger than you need is not a safety net either. An oversized furnace cycles on and off more, which wears out parts faster and leaves rooms feeling uneven. Homes here need heat 7 months a year, from October through April, so getting this number right matters more than it would somewhere milder.
- How do I know it's time to replace my furnace?
- Age is the first thing to look at. Once a furnace has been running for many years, repairs start to become a losing bet. Watch for signs too. Heat that is not even room to room, a furnace that cycles on and off more than it used to, or a gas smell you notice near it. If you are calling someone out for the same problem more than once a season, that is usually the furnace telling you it is done, not the repair failing.
- Is a high-efficiency furnace worth it?
- Any gas furnace built new has to reach at least 80 percent AFUE, so the question is not efficient versus inefficient. It is how much higher than that minimum you want to go. A furnace with a higher AFUE gets more heat out of the same fuel and sends less of it out the vent. Winter nights here average 30°F and homes need heat from October through April, so a furnace is running for most of the year, and that is when the difference in efficiency adds up. A contractor can walk you through which models make sense for your house.