Furnace Installation & Replacement in Westminster

Homes built since 2000, including much of Legacy Ridge and Bradburn Village, usually have condensing furnaces. When one is replaced, we check that the existing PVC meets the new furnace's diameter and length limits, that terminations meet clearance rules, and that the condensate trap and line are replaced. Trailside, built in the 1990s, has furnaces in the 25-to-30-year range if they're original.

Townhomes often have the furnace in a closet or small utility room, sometimes on an upper level, and exterior vent locations may be governed by HOA rules. A compact condensing furnace with sidewall PVC is often possible. Where it isn't, an ultra-low NOx 80% furnace on the existing vent may be the practical choice. We check both before quoting, along with the HOA's rules and whether the furnace closet has the combustion air the new unit requires.

At about 5,325 feet, a furnace loses roughly 21% of its sea-level rating. A 60,000 Btu/h input furnace becomes about 47,000 here once orifices and gas pressure are set for altitude. We size from a Manual J; many 1980s homes have had window and insulation upgrades that reduce the load.

Colorado's HB23-1161 has applied since January 1, 2026: any new gas furnace sold here needs a certified NOx rate of 14 ng/J or less, or the latest ENERGY STAR certification, which became 97% AFUE for northern states on July 31, 2026. When a condensing furnace leaves a shared vent, the water heater's vent has to be resized for it alone. Our NOx guide covers the rules.

The City of Westminster Building Division requires a permit and inspection to install or replace a furnace, and since you're inside city limits, it comes from the city regardless of whether you're on the Adams or Jefferson County side. We file it and meet the inspector.

Xcel Energy supplies gas and most electricity, with United Power serving some customers. An outside rebate database lists Xcel's furnace rebates as discontinued from January 1, 2026. For a heat pump, a $1,000 Colorado tax credit for air-source heat pumps plus Power Ahead Colorado's $1,500 for cold-climate models apply, and Xcel heat pump rebates changed October 1, 2026. See dual fuel in Colorado.