Furnace Installation in Ellensburg, WA
A new furnace here will run from September through June every year. Tell us about the house, and a licensed contractor who covers Kittitas County will get in touch.
Tell us about the job
It takes about a minute.
Ten months of heat, and winters that test the grid
Ellensburg homes need heat from September through June. That is ten months a year, with winter nights averaging 23°F. A new furnace here has to handle a long, cold season, not just a few sharp weeks.
Most homes in Washington heat with electricity, and the grid does not always hold through a storm. The state saw 23% of households lose power for 24 hours or more in 2024, and this area has logged 26 winter storms and 3 damaging wind events over the past ten years. That is worth weighing when you choose between a gas furnace and an electric one, or think about backup heat. Any new non-weatherized gas furnace also has to meet a federal minimum of 80.0 percent AFUE, so at least that much of every therm it burns goes into heating your house.
- 10 months
- September through June, 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
Washington requires contractors to register with the state.
Registration means the contractor's business is on file with the Department of Labor and Industries. It does not mean anyone tested their work. There is no trade exam behind it, so the number on file tells you the business is registered, not that the state has judged their furnace work.
For a furnace installation, the real check is local. In most cities and counties in Washington, replacing a furnace needs a permit from the local building office, and an inspection once the work is done.
Source: Washington State Legislature
- What size furnace does my house need?
- The right size comes from a load calculation, not a rule of thumb based on square footage. A contractor works through your insulation, window count, ceiling height and air leaks to get a number specific to your house. Winter nights here average 23°F, and a furnace that's too big will short cycle while one that's too small will run constantly and still fall behind. Ask the contractor to show you the calculation, not just a size they're used to installing.
- How do I know it's time to replace my furnace?
- Rising repair calls are the clearest sign, especially if the same part keeps failing or a repair costs a real fraction of a new unit. Heat that's uneven room to room, or a furnace that runs long cycles without warming the house, both point to a system falling behind. Homes here need heat from September through June, so a furnace that's struggling has to carry that load for most of the year. If you're already calling for repairs more than once a season, get a contractor to look at replacement costs alongside the repair.
- Is a high-efficiency furnace worth it?
- It depends on how long you'll own the house and what you're replacing. Any non-weatherized gas furnace built after November 2015 already has to hit at least 80 percent AFUE, so the real choice is between that baseline and a higher-efficiency model, which costs more up front but uses less fuel over the 10 months homes here need heat. A contractor can lay out the actual models and their ratings for your house so you're comparing real numbers instead of a general answer.