Furnace Installation in Moscow, ID
A new furnace here will run from September through June every year. Tell us about the house, and a licensed contractor who covers Latah County will get in touch.
Tell us about the job
It takes about a minute.
Ten months of heating in Moscow
Your furnace here runs from September through June, ten months a year. Winter nights average 25°F from December through February, and that cold is what drives most of those hours.
Power is worth planning around too. Latah County has seen 251 winter storms and 25 damaging wind events over the past ten years, and across Idaho, 11 percent of households went at least a day without power in 2024. Just over half the homes here heat with electricity, so it's worth asking a contractor how a new furnace holds up when the grid goes down. Any gas furnace installed today has to reach at least 80 percent AFUE, so that baseline is already set before you start comparing units.
- 10 months
- September through June, your furnace is on duty
- 25°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Idaho requires HVAC contractors to hold a state license.
The license comes from the state's HVAC Board and it belongs to the contractor, not to any single job. That means the person or company doing the work was tested and is on record with the state, and that record follows them from one job to the next rather than resetting each time.
For a furnace installation in Latah County, that license is the thing accountable for the work itself. Most cities and counties also require a permit from the local building office for a furnace replacement, with an inspection once the furnace is in. Where that applies, the permit and inspection are separate from the license. They are the record that this particular installation was done and looked at, sitting alongside the state's record of who did it.
Sources: Idaho Legislature · Idaho Division of Occupational and Professional Licenses
- 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 measures your walls, windows, insulation, and ceiling height, and factors in Moscow's winter lows, then runs the numbers to find the output your house actually needs. A furnace that's too big will short cycle and wear out faster. One that's too small will run constantly all winter and still leave rooms cold. Ask whoever quotes the job to walk you through the load calculation, not just the number they landed on.
- How do I know it's time to replace my furnace?
- If your furnace is old, needs frequent repairs, or can't keep the house warm anymore, it's time to start looking at replacement. Furnaces here run ten months a year, so they rack up hours fast, and that shortens the years you get out of one. Rising repair bills are usually the clearest sign, especially once a repair costs a large share of what a new furnace would. Uneven heat, a furnace that runs longer to reach the same temperature, or a yellow instead of blue flame are also worth having a contractor look at.
- Is a high-efficiency furnace worth it?
- It depends on how you weigh the higher upfront cost against lower gas bills over the years you keep the house. Every furnace sold today has to meet at least 80 percent AFUE, so even a standard model wastes less fuel than older units did. High-efficiency furnaces push past that baseline and burn less gas to make the same heat, which matters most in a place that needs heat ten months of the year. A contractor can price both options for your house and let you compare the difference directly.