Furnace Installation in Gillette, WY
A new furnace here will run from September through June every year. Tell us about the house, and a licensed contractor who covers Campbell County will get in touch.
Tell us about the job
It takes about a minute.
Ten months of heat a year asks a lot of a furnace
In Gillette, furnaces run September through June. Winter nights average 13°F, and that means long hours of steady work for a new system, not just a few cold snaps to get through.
More than half the homes here heat with gas, and any non-weatherized gas furnace built since November 2015 has to reach at least 80 percent AFUE. Power matters too. Wyoming saw 8% of households lose power for 24 hours or more in 2024, and this county has logged 49 winter storms and 202 damaging wind events over the past ten years. A new furnace here needs to hold up through the season and through what the weather does along the way.
- 10 months
- September through June, your furnace is on duty
- 13°F
- the average winter night it heats against
- 53%
- 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 $110 a year to run in Campbell County compared with a gas furnace.
Estimates for a typical Campbell County home, from EIA household energy data, Wyoming fuel prices and NOAA climate normals. Your home will differ.
- What size furnace does my house need?
- The right size comes from a load calculation, not a guess based on square footage. A contractor measures your walls, windows, insulation, and ceiling height, then figures out how much heat your house actually loses on a cold night. That matters more here than in milder places, since winter lows average 13°F and the furnace has to keep up with that for ten months a year. Too big and it short cycles, too small and it runs constantly without catching up. Ask the contractor to walk you through the calculation rather than just quoting a number.
- How do I know it's time to replace my furnace?
- Watch for uneven heat, rising bills for the same amount of use, or repairs that keep coming back. An older furnace is worth a second look too, especially in a place where the furnace runs nearly all year, September through June. If yours is struggling to keep the house warm when it's 13°F outside, that's a sign it's losing ground, not just having an off night. A contractor can tell you whether the unit is worth repairing again or whether replacement makes more sense at this point.
- Is a high-efficiency furnace worth it?
- It depends on how much you heat and how long you plan to stay in the house. Since homes here need heat from September through June, a furnace is doing a lot of work over the year, so the efficiency rating has more chance to matter than it would somewhere with a short winter. Every non-weatherized gas furnace built since November 2015 has to hit at least 80 percent AFUE, so even a standard model isn't wasteful, but higher-efficiency units push that further. A contractor can lay out the AFUE options for your situation and let you weigh the difference yourself.