Furnace Installation & Replacement in Lone Tree

Heritage Hills, the gated community, and most of the 1990s and 2000s single-family neighborhoods have furnaces that are either original and near 25 to 30 years, or replacements from the 2000s. Some still have 80% furnaces venting with the water heater through a B-vent; others are condensing on PVC.

Grand View Estates is older, with 1970s homes on acre-plus lots. Furnaces there have been replaced several times, and venting and ductwork often reflect earlier remodels. Acres Green homes date from the city's early years and follow a similar pattern. In both, it's common to find a furnace that was moved or replaced during a basement finish, with ducts extended to new rooms and the return left as it was. We measure airflow before choosing the new furnace's size and blower.

RidgeGate, including Lyric and the East Village, has been building single-family homes, rowhomes and condos over the past two decades. Furnace replacements there are uncommon. In rowhomes and condos, space and vent routes are tight and HOA rules may govern sidewall terminations, so we check those before recommending equipment. Stacked units may also have the furnace in a closet with limited clearance, where a compact or horizontal model is the only fit.

Since January 1, 2026, new gas furnaces sold in Colorado must meet 14 ng/J NOx or the current ENERGY STAR version (97% AFUE in the North as of July 31, 2026). In a home with an 80% furnace on a shared B-vent, an ultra-low NOx 80% furnace can stay on the vent if it is sized correctly. A 97% furnace vents in PVC and needs a drain, and the water heater then needs its vent resized for one appliance. Our NOx guide covers the details.

The City of Lone Tree Building Division accepts permit applications only electronically and performs the inspection. We submit the application and schedule the inspection. Xcel Energy supplies gas and electricity citywide. One third-party rebate tracker says Xcel stopped offering gas furnace rebates when 2026 began, so we verify before counting on one.

Because Lone Tree homes are on Xcel electric, they can use Xcel heat pump rebates, which changed October 1, 2026, along with Colorado's $1,000 air-source credit and Power Ahead Colorado's $1,500 cold-climate rebate. At this altitude, heat pump sizing needs care; see our sizing guide.