Furnace Installation & Replacement in Evergreen

Xcel natural gas reaches much of the central area, but outlying properties on well and septic often heat with propane. A propane furnace is built or converted with its own orifices and pressures, and the supplier usually tests the line when equipment changes. Converting a home from propane to natural gas, where a main is close, involves Xcel service, a new meter and a full fuel conversion of the furnace.

Jefferson County's mechanical permit form lists boilers and radiant floors alongside furnaces, and Evergreen has all three. If your home has radiant heat downstairs and a furnace upstairs, replacing the furnace is a separate job from the boiler, and we can look at both on one visit.

Gas furnaces sold in Colorado since January 1, 2026 must meet 14 ng/J NOx or the current ENERGY STAR version, which covers propane furnaces too. Condensing 97% furnaces vent through PVC, and in Evergreen the termination has to stay above drifting snow; we often raise it or use a vent kit designed for snow. Condensate lines can freeze in unheated crawlspaces, so we route them inside the conditioned envelope or add heat tape. An ultra-low NOx 80% furnace can use an existing metal flue, which may be the simpler choice in an older cabin.

Smaller homes in Kittredge and older parts of town sometimes have a furnace in a tight crawlspace or closet with limited combustion air. A replacement must meet current clearance and combustion air rules, and a sealed-combustion condensing furnace, which draws outdoor air through its own pipe, often solves that. Uninsulated ducts in crawlspaces are worth fixing at the same time.

Cold-climate heat pumps work up here, but on the coldest nights most homes still want backup. Pairing one with a gas or propane furnace in a dual-fuel system is often the best fit, especially when propane is expensive. Colorado's $1,000 air-source credit and Power Ahead Colorado's $1,500 cold-climate rebate apply regardless of utility. Electricity comes mainly from Xcel, but CORE Electric Cooperative also serves parts of mountain Jefferson County; check your bill before counting on Xcel rebates.

Evergreen is unincorporated, so Jefferson County Building Safety issues the mechanical permit. We file it and schedule the inspection.