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Getting a furnace sized and installed right matters more in this county than in places where the heating load is light. Homes in Western Connecticut Planning Region, CT run heat about eight months a year, from October through May. The burner and heat exchanger cycle through that entire stretch, and a unit that is undersized for the house runs longer per cycle, compounding wear on the ignition system and the heat exchanger itself. A contractor quoting a replacement here has to run a proper load calculation before settling on equipment, because an underpowered install will make its mistake felt long before the warranty period closes.
Ductwork routed for an older system and a service panel sized before modern draw requirements became standard are what a contractor has to account for before a furnace installation can be priced accurately. Half the homes in Western Connecticut Planning Region, Connecticut were built in 1971 or earlier (2020-2024 ACS 5-year). That gap between what the house was built with and what runs in it now is where installations get complicated: ducts may carry the wrong volume for a new furnace's output, and the panel may need an upgrade before the new unit can run safely. The equipment selection comes after those questions are answered.
What Gets Installed With a New Furnace
The furnace itself sits in the basement, utility room, or crawlspace and is the core unit a contractor installs. Inside it, a heat exchanger and a blower work together: the exchanger warms the air and the blower pushes that air out into the house. The flue pipe runs from the unit up and out of the building, carrying combustion gases away.
The thermostat mounts on a main living-area wall and is the control point the homeowner touches directly. A contractor also installs or connects the condensate drain line, the gas supply line, and the filter housing, each of which ties into the furnace at the unit itself before the system runs.
The drawing shows a typical layout, and a licensed contractor determines what applies to your specific home and setup.
Find a contractor in Western Connecticut Planning RegionWestern Connecticut Planning Region, by the numbers
Half the homes in Western Connecticut Planning Region, Connecticut were built in 1971 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesWestern Connecticut Planning Region, Connecticut holds 251,530 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 66.4% of the occupied homes in Western Connecticut Planning Region, Connecticut (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFurnace Installation Rules & Standards for Western Connecticut Planning Region, Connecticut5 sourced regulations and codes
What the installation looks like on your end
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.
What Connecticut and Western Connecticut Planning Region Require for HVAC Installation
Connecticut requires a state licence to perform, or to advertise, heating, piping and cooling work: no person may practise an occupation this chapter covers without first obtaining one.