
Colorado’s Ultra Low-NOx Furnace Law: What Homeowners in Colorado Springs & Boulder Need to Know Before 2026
Ultra Low-NOx Requires Lower Emission Furnaces Colorado homeowners, especially those in Colorado Springs and Boulder, may be hearing more about new Ultra Low-NOx furnace regulations taking effect January 1, 2026. This Colorado law requires lower‑emission (Ultra Low‑NOx) furnaces for any new equipment manufactured after that date. While it does not



