Furnace Installation & Replacement in Englewood

About 44% of the city's housing was built between 1940 and 1969 and another 11% before 1940. Northwest Englewood has homes from the 1910s, many with basements that once held coal or gravity furnaces. These houses are on their third or fourth furnace, but the chimney is often original.

Arapahoe Acres, the National Register-listed modernist enclave whose houses went up between 1949 and 1957, used a mix of radiant floor heat and forced air. A furnace replacement there has to respect a compact mechanical space and, in some homes, coordinate with a radiant system. Hampden Hills is the newest area, with furnaces that are usually condensing already.

The city's elevation calls for about a 21% derate. A 60,000 Btu/h input furnace runs at roughly 47,000 Btu/h here after high-altitude setup. Small postwar homes with added insulation frequently need less than that, which is where a modulating furnace or the smallest model in a product line earns its place.

Since January 1, 2026, new gas furnaces in Colorado must meet 14 ng/J NOx or current ENERGY STAR certification (97% AFUE since July 31, 2026). A 97% condensing furnace leaves the chimney and vents through PVC, usually out a sidewall. That often leaves a gas water heater alone in a masonry chimney sized for two appliances, and the code then requires its vent to be sized for it, usually with a liner. An ultra-low NOx 80% furnace can stay on a properly lined chimney. Our NOx guide compares the paths.

Xcel Energy supplies gas and electricity in Englewood. An outside rebate database lists Xcel's furnace rebates as discontinued from January 1, 2026, so check before counting on one. The city's own Home Energy Rebates require pre-approval before work starts, so we time the project to that.

Because the Manual J and Manual D are already done, comparing a heat pump costs little extra effort. Colorado's $1,000 air-source credit and Power Ahead Colorado's $1,500 cold-climate rebate apply, and Xcel heat pump amounts changed October 1, 2026. Our sizing guide explains how the same load numbers carry over.