Furnace Installation in Lisbon, ND
A new furnace here will run from September through May every year. Tell us about the house, and a licensed contractor who covers Ransom County will get in touch.
Tell us about the job
It takes about a minute.
Nine months of heat, and winters that average 5 above
In Lisbon, a furnace runs from September through May. That is nine months of the year the burner needs to work, not just the coldest stretch. Winter nights here average 5°F, so when it does run, it runs hard and it runs long to keep the house at temperature.
Almost half of homes here heat with electricity, and the area sees storms that knock out power. Over the last ten years the county has logged 54 winter storms and 46 damaging wind events, and statewide, 7% of households lost power for a day or more in 2024. If a new furnace runs on electricity to start the burner or move the air, what happens to it in an outage matters here. A new gas furnace also has to meet the federal minimum of 80.0 percent AFUE if it was built after November 2015, so any unit going into a Lisbon home starts from that baseline.
- 9 months
- September through May, your furnace is on duty
- 5°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
North Dakota requires HVAC contractors to hold a state license.
The license is held by the contractor, not tied to any single job, so it covers this installation the same as any other work that contractor does in the state. North Dakota also sets a line at $4,000. Work under that does not need a licensed contractor, but a furnace installation runs well past that threshold, so the contractor doing this job needs to be licensed.
In most cities and counties, a furnace installation also needs a permit from the local building office, with an inspection once the work is done.
Sources: North Dakota Legislative Branch · North Dakota Secretary of State
- What size furnace does my house need?
- The right size comes from a load calculation, not the square footage of your house. A contractor measures your walls, windows, insulation and ceiling height and runs those numbers to find the heat loss for your specific home. Guessing high seems safe but it isn't. An oversized furnace cycles on and off too fast, which wears out parts sooner and leaves rooms uneven. With winter lows here averaging 5°F, a furnace that's sized right will run longer, steadier cycles and hold the temperature better than one that's oversized.
- How do I know it's time to replace my furnace?
- Watch for rooms that won't hold heat evenly, a furnace that short cycles, or a rise in gas bills without a reason. Frequent repairs are another sign, especially if a contractor tells you the heat exchanger or burner assembly is failing. Homes here need heat from September through May, nine months a year, so a furnace on its way out won't hide for long. A contractor can check it and tell you honestly whether it's worth repairing or time to replace it.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and what you're replacing. Every non-weatherized gas furnace made since November 2015 has to reach at least 80 percent AFUE by federal rule, so even a standard model today isn't wasteful. High-efficiency furnaces push that number higher, pulling more heat out of the same fuel, and vent through PVC pipe instead of a metal flue. With heat needed nine months out of the year here, that difference shows up over a winter. A contractor can walk you through the models and what each one means for your house.