Furnace Installation in Garrison, ND
A new furnace here will run from September through May every year. Tell us about the house, and a licensed contractor who covers McLean County will get in touch.
Tell us about the job
It takes about a minute.
Nine months of heat, and nights near 5 below zero
A new furnace going into a home in Garrison has to carry the house from September through May. That is nine months of the year, and the nights it works hardest average 5°F. A furnace sized and installed for a place like this runs longer and starts more often than one going into a milder county, and that changes what installation should account for from the start.
McLean County has seen 27 winter storms and 88 damaging wind events over the past ten years, and across North Dakota 7% of households lost power for at least 24 hours in 2024. Any furnace with electronic ignition needs power to start, so what happens when the power goes out is worth asking about at install. If the new furnace is a non-weatherized gas model built after November 2015, it has to meet 80.0 percent AFUE by federal rule, and that is the baseline a contractor will be working from here.
- 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
A high-efficiency gas furnace would save about $90 a year to run in McLean County compared with a gas furnace.
Estimates for a typical McLean 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 Secretary of State issues the license and keeps the contractor on record. That record follows the contractor, not the furnace going into your house. North Dakota also draws a line at $4,000. Work under that amount does not need a licensed contractor at all. A furnace installation runs well past that line, so the license requirement applies here.
The license covers the contractor, not the job, so the check that lands on your furnace comes from somewhere else. Most cities and counties in North Dakota require a permit for a furnace replacement and an inspection once the work is done. That inspection is what catches a bad gas connection. A bad gas connection is the part of this job that can hurt someone if it is wrong.
Sources: North Dakota Legislative Branch · North Dakota Secretary of State
- What size furnace does my house need?
- It depends on your square footage, ceiling height, insulation, window count, and how the house is laid out, so there's no single number that fits every home. A contractor works this out with a load calculation, not a chart based on house size alone. Going too big wastes fuel and cycles the furnace on and off too fast. Too small and it will run constantly through the cold months and still not keep up on the worst nights. With winter lows here averaging 5°F, getting this number right matters more than in milder places.
- How do I know it's time to replace my furnace?
- Watch for rising repair bills, uneven heat between rooms, and a furnace that struggles to keep up on the coldest nights. An older furnace is more likely to fail right when you need it most, so age is worth weighing alongside how it's been running. With heat needed here from September through May, a furnace that can't hold on all season is worth replacing before it quits outright. If yours is old and starting to act up, have a contractor look at it before the next cold stretch.
- Is a high-efficiency furnace worth it?
- Since 2015, every non-weatherized gas furnace sold has to hit at least 80 percent AFUE, so even a standard model is fairly efficient now. High-efficiency furnaces go further than that minimum, meaning less fuel burned to make the same heat. With homes here needing heat for 9 months of the year, that difference adds up over a full season more than it would somewhere with a short winter. A contractor can walk you through the options for your house and tell you what fits, since cost and payback depend on the specific install.