Furnace Installation in Lebanon, TN
A new furnace here will run from October through April every year. Tell us about the house, and a licensed contractor who covers Wilson County will get in touch.
Tell us about the job
It takes about a minute.
Seven months of heat, and a grid that doesn't always hold
Lebanon needs a working furnace from October through April. That's seven months of the year, with winter nights averaging 31°F. A new furnace has to be sized to carry that whole stretch, not just the coldest night.
59.3% of homes here heat with electricity, and the power doesn't always stay on. In Tennessee, 20% of households went at least 24 hours without power in 2024, and this area has logged 11 winter storms and 260 damaging wind events over the past ten years. That's worth raising with your installer when you're deciding between a gas furnace and an electric one. Any new gas furnace installed today also has to meet the federal minimum of 80.0 percent AFUE.
- 7 months
- October through April, your furnace is on duty
- 31°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 depends on your home's square footage, how well it's insulated, your ceiling height, and how many windows you have. A furnace that's too big will cycle on and off too fast and never heat evenly. One that's too small will run constantly and still leave rooms cold on a 31°F night. A contractor works this out with a load calculation that looks at your actual house, not a rule of thumb based on square footage alone.
- How do I know it's time to replace my furnace?
- Watch for uneven heat between rooms, a furnace that runs longer than it used to, or repairs that keep coming back. An older furnace that's starting to act up is usually not worth patching again and again. With heat needed here from October through April, a furnace that struggles in the shoulder months will only get worse when the lows hit 31°F. If yours is short cycling, making noises it didn't used to, or your gas or electric bills have climbed without a clear reason, have a contractor look at it before you're relying on it during a cold snap.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and what furnace you have now. Every non-weatherized gas furnace made since November 2015 has to hit at least 80 percent AFUE, so even a standard replacement today is more efficient than an older unit might be. A furnace rated above that baseline wastes less gas as heat going out the flue, which matters more here since the furnace runs 7 months of the year. A good number of homes in this area heat with electricity, so it's worth having a contractor compare a high-efficiency gas furnace against your electric heating costs directly, since the better choice depends on your setup, not a general rule.