Furnace Installation in Spokane, WA
A new furnace here will run from September through June every year. Tell us about the house, and a licensed contractor who covers Spokane County will get in touch.
Tell us about the job
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Ten months of heating in Spokane County
Furnaces here run September through June. That is ten months of the year, with winter nights averaging 24°F. A new furnace has to hold up through that stretch, year after year.
Nearly half of homes in the area heat with gas, and any non-weatherized gas furnace built since November 2015 has to reach at least 80 percent AFUE. That is the floor, not a feature. Power is worth planning around too. Close to a quarter of Washington households went at least a day without power in 2024, and the region has logged 527 winter storms and 120 damaging wind events over the past ten years. A furnace installed here should be sized and set up for how long and how hard it will actually run.
- 10 months
- September through June, your furnace is on duty
- 24°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
A high-efficiency gas furnace would save about $100 a year to run in Spokane County compared with a gas furnace.
Estimates for a typical Spokane County home, from EIA household energy data, Washington fuel prices and NOAA climate normals. Your home will differ.
Washington requires contractors to register with the state.
Washington's registration puts the contractor's business on file with the Department of Labor and Industries. There is no trade exam behind it, so it tells you the business is on record, not that the state tested their gas or furnace work.
For a furnace install, the protection that matters comes from the local building office. In most cities and counties, replacing a furnace needs a permit and an inspection once the work is done, and that inspection is what checks the gas connection and the venting, the part of the job where a mistake is dangerous. Almost half the homes in Spokane County heat with gas, so that inspection is doing real work here.
Source: Washington State Legislature
- 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 works through your insulation, window count, ceiling height, and duct layout to find out how much heat your house actually loses on a cold night. With winter lows here averaging 24°F, a furnace that's too small will run constantly and never quite catch up, and one that's too big will short cycle and wear out early. There's no shortcut that replaces this calculation.
- How do I know it's time to replace my furnace?
- Watch for repairs that keep coming back, a furnace that struggles to hold temperature, or a heat exchanger issue, which is a safety problem and not something to patch. Age matters too, and homes here run their heat from September through June, ten months of the year, so the equipment logs more hours than it would somewhere milder. If yours is getting old and the repair calls are piling up, it is worth talking through a replacement with a contractor before the furnace fails on you.
- Is a high-efficiency furnace worth it?
- It depends on how much your house heats each year, and here that's ten months out of the year. Any non-weatherized gas furnace sold new today has to reach at least 80 percent AFUE by law, so the real choice is between that baseline and a furnace built to do better than it. The more months your furnace runs, the more that difference in efficiency shows up in your gas use. A contractor can walk through the actual models and what each one means for a house like yours.