Furnace Installation in Fargo, ND
A new furnace here will run from September through May every year. Tell us about the house, and a licensed contractor who covers Cass County will get in touch.
Tell us about the job
It takes about a minute.
Nine months of heat, nights near 3 below zero
Fargo homes need heat from September through May. That's nine months a year the furnace has to work, not just the deep winter stretch. Winter nights average 3°F here, so whatever gets installed has to hold a house steady against real cold, night after night, most of the year.
Any new non-weatherized gas furnace sold today has to reach at least 80 percent AFUE. That's a federal floor, not a ceiling, and worth knowing when you're comparing what's being installed against what's required.
- 9 months
- September through May, your furnace is on duty
- 3°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.
North Dakota licenses HVAC contractors through the Secretary of State, and that license belongs to the contractor, not to any one job. Work under $4,000 is the exception the state carves out. A job that small does not need a licensed contractor.
A furnace installation costs more than that in almost every case, so the contractor doing this job needs to hold that state license. The license covers who is allowed to do the work, but it is not the only check on this job. Most cities and counties in North Dakota require a permit for a furnace replacement and an inspection once the work is done, and that inspection is what catches a bad gas connection, the part of this job that can actually hurt someone.
Sources: North Dakota Legislative Branch · North Dakota Secretary of State
- What size furnace does my house need?
- There is no way to answer that without looking at your house. A contractor figures this out with a load calculation, which weighs your square footage against your insulation, your windows, your ceiling height, and how the place is laid out. Going by square footage alone leads to a furnace that is too big or too small, and either way you pay for it. Too big and it short cycles, heating the house in bursts and wearing out its parts faster. Too small and it runs constantly all winter without keeping up, especially on the nights here that drop to 3 degrees. Ask whoever quotes the job to walk you through the load calculation, not just give you a number.
- How do I know it's time to replace my furnace?
- Age is the first thing to look at. A furnace installed today has to hit 80 percent AFUE at minimum under the current federal standard, so if yours is old enough to predate that, it is very likely running well below what a new one would give you. Rising bills for the same amount of heat, a furnace that cycles on and off more than it used to, or a technician who tells you the heat exchanger is cracked are all signs to stop repairing and start replacing. Where you live, the furnace is doing real work nine months of the year, September through May, so a furnace on its way out shows itself fast once the cold sets in. If you are calling a repair tech more than once a season, get a quote on replacement instead.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and what you are paying for heat now, and a contractor can walk you through that math for your specific situation. What is true everywhere is that a high-efficiency furnace burns less gas for the same heat, and with winter lows here averaging 3 degrees and homes needing heat from September through May, that furnace runs a lot over the course of a year. Nearly half of homes in this area heat with electricity instead of gas, so if that is you, the efficiency conversation is different and worth asking about directly. Either way, get the specific numbers for your house before deciding, since the standard efficiency furnace and the high-efficiency one will cost different amounts up front and a contractor can lay out what each one means for your bills.