Furnace Installation in Troy, MO
A new furnace here will run from October through April every year. Tell us about the house, and a licensed contractor who covers Lincoln County will get in touch.
Tell us about the job
It takes about a minute.
Seven months of heat, and nights that drop to 23°F
Troy homes need the furnace running from October through April. That is seven months out of the year, and on winter nights it is holding the house against an average low of 23°F. A new furnace here has to be sized for that stretch, not just for the coldest night.
Most homes in this area heat with electricity, so a power outage means no heat at all. Lincoln County has seen 8 winter storms and 36 damaging wind events over the past ten years, and across Missouri, 19% of households went at least 24 hours without power in 2024. If you are installing a gas furnace, it has to meet the federal minimum of 80 percent AFUE, the standard for non-weatherized gas furnaces built since November 2015.
- 7 months
- October through April, your furnace is on duty
- 23°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 house, not a general rule. A contractor works this out from your square footage, your insulation, your windows, and how the place is laid out, then runs a load calculation to land on the number. Going by size alone, or by what the last furnace was, usually gets it wrong in one direction or the other. Too big and it short cycles, too small and it runs constantly and still can't keep up when it's 23°F outside.
- How do I know it's time to replace my furnace?
- Age is the first sign. An older furnace starts needing repairs more often, and at some point that's more than putting in a new one would cost. Watch for uneven heat between rooms, a furnace that cycles on and off too fast, or a rise in your gas or electric bill with no other explanation. Since homes here need heat from October through April, a furnace on its way out tends to show these signs across most of the year, not just on the coldest nights.
- Is a high-efficiency furnace worth it?
- It depends on how many months your furnace runs and what you're paying to heat with now. Homes here need heat seven months a year, October through April, so a furnace here logs a lot more hours than one in a milder climate, and that's exactly the condition where higher efficiency pays back over time. Every new non-weatherized gas furnace sold today has to hit at least 80 percent AFUE by law, so the real question is whether it makes sense to go beyond that minimum. A contractor can walk you through the options and price out what fits your house.