Furnace Installation in Jamestown, ND
A new furnace here will run from September through May every year. Tell us about the house, and a licensed contractor who covers Stutsman County will get in touch.
Tell us about the job
It takes about a minute.
Nine months of heat a year in Jamestown
Winter nights here average 4°F from December through February, and homes need heat from September clear through May. That is nine months of the year your furnace has to work, not just the coldest stretch.
A new furnace here has to be sized for that cold and built to run that long without breaking down. Any non-weatherized gas furnace made since November 2015 has to hit at least 80 percent AFUE. That is the floor, not a selling point, and worth knowing when you compare what a contractor is offering to install.
- 9 months
- September through May, your furnace is on duty
- 4°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 Stutsman County compared with a gas furnace.
Estimates for a typical Stutsman County home, from EIA household energy data, North Dakota fuel prices and NOAA climate normals. Your home will differ.
North Dakota requires HVAC contractors to hold a state license.
The license is held by the contractor, not issued job by job, so it covers the business doing the work rather than any single install. Work under $4,000 does not need a licensed contractor at all, but a furnace installation runs well past that, so this is licensed work in Stutsman County.
A furnace installation also needs a permit in most cities and counties, with an inspection once the work is done, separate from the state license. In Stutsman County, close to half of homes heat with gas, so a furnace installation is common work here.
Sources: North Dakota Legislative Branch · North Dakota Secretary of State
- What size furnace does my house need?
- There is no single number that works for every house. A contractor works out sizing with a load calculation, looking at your square footage, insulation, windows, and ceiling height, then figuring how much heat your house loses on the coldest night. Jamestown winter nights average 4°F, so that calculation carries more weight here than in a milder place. Guessing on size, or just matching the old furnace, can leave you with a unit that short cycles or can't keep up, and either way it wears out early.
- How do I know it's time to replace my furnace?
- Watch for a furnace that cycles on and off too often, one that can't keep the house warm on the coldest nights, or one that needs a repair call every winter. Homes here need heat from September through May, nine months of the year, so a furnace that's struggling has plenty of time to show it. If yours is already having trouble, get it looked at before the next cold stretch, not in the middle of one. A contractor can tell you whether what you're seeing is a repair or a sign the unit is done.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and what you're comparing it against. Every non-weatherized gas furnace built since November 2015 has to reach at least 80 percent AFUE, so that's the floor no matter what you buy. A higher-efficiency furnace burns less gas to make the same heat, and with nine months of heating a year here, that difference shows up on more bills than it would in a warmer state. A contractor can lay out the installed cost against what you'd save in gas over the years you expect to own the house.


