Furnace Installation in Nampa, ID
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Canyon County will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat, and winter nights near 25
Nampa homes need the furnace running from October through May. That is most of the year, and on winter nights the temperature averages 25°F. A new furnace here has to carry that load night after night, not just take the edge off.
Most homes in the area heat with gas, and any non-weatherized gas furnace built since November 2015 has to hit at least 80 percent AFUE. That is the floor, not a feature. Canyon County has also seen its share of winter storms and wind events over the past ten years, and in a bad outage a furnace that depends on electricity to run its blower and controls will not fire until the power is back.
- 8 months
- October through May, your furnace is on duty
- 25°F
- the average winter night it heats against
- 59%
- 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 $50 a year to run in Canyon County compared with a gas furnace.
Estimates for a typical Canyon County home, from EIA household energy data, Idaho fuel prices and NOAA climate normals. Your home will differ.
Idaho requires HVAC contractors to hold a state license.
Idaho licenses HVAC contractors through the state HVAC Board. The state tested the contractor and keeps a record of that license, but the license is held by the business, not issued for each job. It covers who is allowed to do the work, not this particular furnace install.
For this job, the license is what stands behind the contractor's qualifications. The check on the finished work comes from somewhere else. In most cities and counties, replacing a furnace needs a permit from the local building office and an inspection once the work is done. That inspection is what confirms the gas connection and venting were done right, which matters here since 59.4% of homes in Canyon County heat with gas.
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 tape measure or square footage chart alone. That calculation looks at your insulation, your windows, your ceiling height, and how much air leaks in and out, then figures out how much heat you lose on a cold night. Get this wrong and you feel it every winter. Too small and it runs constantly without keeping up on the coldest nights. Too large and it heats the house in short bursts, which wears out its parts faster and leaves rooms uneven. A contractor who comes to look at the house is the only way to get a real number.
- How do I know it's time to replace my furnace?
- Watch for a few signs together, not just one. If it needs a repair every year, if your gas bills keep climbing even though you have not changed how you use it, or if some rooms stay cold no matter what the thermostat says, the furnace is telling you something. Age matters too. Furnaces built new today have to hit 80 percent AFUE at minimum, so if yours is old enough to predate that rule, it is likely burning more gas than a current model would for the same heat. Homes here need heat from October through May, eight months of the year, so a furnace on its way out gets worked hard for most of that stretch. If it fails on a night near that 25°F winter average, you are without heat when you need it most. A contractor can tell you honestly whether a repair still makes sense or whether you are past that point.
- Is a high-efficiency furnace worth it?
- It depends on what your furnace is doing now and how long you plan to stay in the house. A high-efficiency furnace burns less gas to produce the same heat, and in Canyon County, where 59.4 percent of homes heat with gas, that difference shows up on the bill during the months the furnace is running. The upfront difference in cost is something a contractor needs to quote for your specific house and the equipment you are considering. What is true for every home here is that heat is needed from October through May, eight months a year, with winter nights averaging 25°F, so any efficiency gain gets used often rather than sitting idle most of the year.