Furnace Installation in Hailey, ID
A new furnace here will run from September through June every year. Tell us about the house, and a licensed contractor who covers Blaine County will get in touch.
Tell us about the job
It takes about a minute.
Ten months of heat a year in Blaine County
Winter nights here average 14°F from December through February, and homes need heat from September through June. That is ten months a year the furnace has to work, with only a couple of months when it can rest.
A furnace going into a house here has to be sized for real cold, not a mild snap. And if it is a non-weatherized gas furnace built after November 19, 2015, federal rules require it to reach at least 80 percent AFUE. Power is worth planning around too. Across Idaho, 11% of households lost power for 24 hours or more in 2024, and Blaine County has logged 142 winter storms and 38 damaging wind events over the past ten years.
- 10 months
- September through June, your furnace is on duty
- 14°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 sits with the contractor, not with this particular job. Idaho's HVAC Board tests and records the person or business doing the work, and that record follows them from house to house, not job to job.
For a furnace install, that license is what stands behind the work. On top of it, most cities and counties in Idaho require a permit before the furnace goes in and an inspection once it is done, which is where the gas connection and venting get checked by someone outside the job.
Sources: Idaho Legislature · Idaho Division of Occupational and Professional Licenses
- What size furnace does my house need?
- A contractor works this out with a load calculation, not a chart based on square footage alone. That calculation looks at your insulation, your windows, your ceiling height, and how much air leaks in and out. Guessing on size backfires either way. Too small and it runs constantly trying to keep up on a 14°F night. Too big and it short cycles instead of heating evenly. With 10 months of heating a year here, getting the size right matters more than in places where the furnace sits idle most of the time.
- How do I know it's time to replace my furnace?
- The clearest sign is a furnace that can't keep the house warm anymore on a cold night, or one that needs a repair call every season. Rising gas bills with no other explanation point the same direction. Age matters too. A furnace installed new today has to meet 80 percent AFUE at minimum, so if yours is old enough to predate that standard, it's likely running well below what a new one would. With heat needed here from September through June, a furnace that's struggling doesn't get much of a break to recover.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and how much you run the furnace. Homes here need heat 10 months of the year, with winter lows averaging 14°F, so a furnace gets far more hours of work than it would somewhere milder. A higher AFUE rating means less fuel burned for the same heat over that many months. A contractor can walk through the actual models and ratings and price out what fits the house.