Furnace Installation in Sidney, MT
A new furnace here will run from September through May every year. Tell us about the house, and a licensed contractor who covers Richland County will get in touch.
Tell us about the job
It takes about a minute.
Nine months of heat, and nights near zero
Sidney needs a furnace from September through May. That is nine months of the year, and winter nights average 6°F. A new furnace here has to hold that line night after night, not just take the edge off a cold snap.
More than half the 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 selling point. Over the past ten years the area has recorded 18 winter storms and 91 damaging wind events, the kind of weather that knocks out power. In 2024, 18 percent of Montana households went at least 24 hours without electricity. A furnace that comes back on by itself once power returns matters here.
- 9 months
- September through May, your furnace is on duty
- 6°F
- the average winter night it heats against
- 55%
- 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 $90 a year to run in Richland County compared with a gas furnace.
Estimates for a typical Richland County home, from EIA household energy data, Montana fuel prices and NOAA climate normals. Your home will differ.
Montana requires HVAC contractors to hold a state license.
Montana licenses the contractor, not the job. The license sits with the Department of Labor and Industry's records and stays with the contractor from one job to the next. Work under $2,500 falls outside that requirement, so a small repair may not need a licensed contractor behind it. A furnace installation runs well past that line, so the license applies here.
Most cities and counties also require a permit from the local building office for a furnace installation, with an inspection once the work is done. That inspection is where a bad gas connection gets caught. More than half the homes in Richland County heat with gas, so that check on the gas line is not a formality here.
Source: Montana Legislature
- What size furnace does my house need?
- It depends on your square footage, how well the house is insulated, your ceiling height, and how many windows you have facing north. A furnace that's too big will cycle on and off too fast and never heat evenly. One that's too small will run constantly and still leave rooms cold on a 6°F night. A contractor sizes it with a load calculation that looks at your actual house, not a chart based on square footage alone.
- How do I know it's time to replace my furnace?
- Age is the first thing to check. As a furnace gets older, repairs get more frequent and parts get harder to find. Watch for uneven heat between rooms, a furnace that runs longer than it used to, or a rising gas bill with no other explanation. Heat is needed here from September through May, so a furnace that's already struggling is only going to face more months of work ahead.
- Is a high-efficiency furnace worth it?
- Any furnace made since November 2015 has to hit at least 80 percent AFUE, so the question is really whether to go higher than that. A high-efficiency furnace pulls more heat out of the same amount of gas, which matters most in a place that needs heat for 9 months of the year. Just over half of homes in Richland County heat with gas, so for many houses here that efficiency gets used a lot. A contractor can walk through the actual numbers for your house and your furnace.