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Sizing a furnace for this house means accounting for a burner and heat exchanger that cycle hard through a long stretch of cold months with almost no rest in between. Homes in Montrose County, CO run heat about eight months a year, from October through May. The ignition system fires, the heat exchanger flexes through its temperature range, and the burner runs through its paces again and again before the system finally goes quiet for summer. A contractor quoting a replacement here has to establish that the new unit is matched to the actual load the house places on it, because an undersized furnace in this county accumulates wear at a rate a well-matched one does not.
Ductwork laid down for a furnace that has already been replaced once or twice carries the geometry and sizing decisions of that original install. Half the homes in Montrose County, Colorado were built in 1991 or earlier (2020-2024 ACS 5-year). When a contractor quotes a new furnace here, the duct system is what gets measured and assessed before anything else is priced, because a run that was acceptable for prior equipment may restrict airflow for a modern unit with different static pressure requirements. Electrical service is checked in the same pass. The furnace itself can be specified quickly; what the house already contains is where the scope of the job gets settled.
What Gets Installed With a New Furnace
The furnace itself sits in a utility room, basement, or closet and is the unit that generates heat for the house. Attached to it is the flue pipe, which runs from the furnace to an exterior wall or through the roof and carries combustion gases out of the home.
The air handler or blower compartment, built into or paired with the furnace cabinet, pushes conditioned air into the supply side of the house. The thermostat mounts on an interior wall and is the control point that tells the furnace when to fire and when to stop.
The drawing shows a representative layout, and a licensed contractor determines exactly which components and configurations apply to your home.
Get matched in Montrose CountyMontrose County, by the numbers
260 severe weather events were recorded in Montrose County, Colorado between 2015 and 2024.
NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31.Half the homes in Montrose County, Colorado were built in 1991 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesMontrose County, Colorado holds 19,758 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 75.4% of the occupied homes in Montrose County, Colorado (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFurnace Installation Rules for Montrose County, Colorado4 sourced standards and codes
What the installation actually looks like
Non-weatherized gas furnaces manufactured on or after November 19, 2015 must reach 80.0 percent AFUE.
Non-weatherized oil-fired furnaces manufactured on or after November 19, 2015 must reach 83.0 percent AFUE.
Mobile home gas furnaces manufactured on or after November 19, 2015 must reach 80.0 percent AFUE.
Non-weatherized gas furnaces manufactured on or after December 18, 2028 must reach 95.0 percent AFUE, up from the 80.0 percent minimum that applies to units manufactured before that date.
Severe Weather Events in Montrose County
Weather in Montrose County puts real demands on heating equipment, from deep cold snaps to abrupt seasonal shifts that force a furnace to work harder and longer. What the climate does locally shapes what a furnace needs to handle, which is why local installation work starts with knowing what this area actually sees.
260 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.