Furnace Repair & Installation
Foothill storms and cold snaps punish Fort Collins furnaces, and we repair ignition trouble, cold air, and short cycling, and replace furnaces that keep failing.
Learn more →Fort Collins Heating & Cooling
HVAC Services in Fort Collins, CO
Fort Collins sits at 4,997 feet where the plains meet the foothills, with cold winters, hot summers, and Cache La Poudre River air. From Old Town to Fossil Creek, we repair, install, and maintain the HVAC equipment Fort Collins homes depend on.
Heating and Cooling From Old Town to Horsetooth in Fort Collins
Fort Collins weather swings with the foothills. Winter storms roll down from the mountains, summer afternoons climb high, and the Poudre River valley adds humidity that the rest of the Front Range rarely sees. Heating systems here need to handle cold snaps, and cooling systems need to handle both heat and muggy stretches.
Housing in Fort Collins runs from Old Town historic homes to 1950s to 1970s builds and new southeast subdivisions. Old Town homes often carry old ductwork, radiators, and boilers. Newer southeast homes run on high-efficiency furnaces, heat pumps, and AC units. We work on all of it, and we size replacements for the home as it stands.
Fort Collins Foothill Storms, River Moisture, and Your HVAC
Foothill storms and cold snaps. Fort Collins storms roll down from the mountains and arrive fast off the foothills, so a weak furnace in Old Town or Fossil Creek often quits during the first hard cold snap. Fall checks catch worn ignitors, filters, and safety controls early.
River valley humidity. Homes near the Poudre River and Horsetooth Reservoir see more humidity than most Front Range homes, and that moisture shows up as musty air and condensation. We check ventilation and drainage along with the heating and cooling system.
Old Town ductwork. Historic Old Town homes often have ducts sized for a different era, so some rooms run hot while others stay cold. We test airflow, seal leaks, and rebalance supply.
Hot summers, hard-working AC. A Fort Collins summer afternoon works an AC unit hard, and when the charge runs low or the coil fouls, the house blows warm air or the line ices over. We find the cause and restore cooling from Old Town to Fossil Creek.
Dry air in winter. Running the heat all winter pulls moisture out of Fort Collins indoor air, leaving static, cracked wood, and scratchy throats behind. A whole-home humidifier adds moisture back to Fort Collins indoor air.
With foothill storms that arrive fast off the mountains above Horsetooth and Old Town, the National Weather Service forecast office in Boulder is the place to check the Fort Collins forecast, and the EPA indoor air quality pages cover indoor air for homes dealing with river-valley humidity and winter dryness.
Fort Collins Services, Old Town to Horsetooth
Fort Collins runs from Old Town to Horsetooth at 4,997 feet, with foothill storms, river-valley humidity, and a college town mix of old and new housing, so the twelve services below cover ductwork from the 1900s to new-build setup.
Boiler Repair & Installation
Old Town and Indian Hills hold Fort Collins homes on boiler heat, and a cold radiator there usually means a stuck valve or low pressure.
Learn more →Heat Pump Installation & Repair
A heat pump in Spring Canyon or Quail Hollow has to handle foothill cold snaps and river-valley humidity, and we install and repair units sized for both.
Learn more →AC Repair & Installation
Fort Collins AC units work hardest on July afternoons after a foothill storm breaks, and we repair warm air, frozen lines, and odd cycling.
Learn more →Ductless Mini-Split Services
A finished basement or a garage workshop in Indian Hills gets heating and cooling from a mini-split, with no ductwork to run.
Learn more →Evaporative Cooler Services
Fort Collins swamp coolers need fresh pads and a working pump to beat July heat, and we service both.
Learn more →Indoor Air Quality
River-valley humidity leaves some Fort Collins homes musty while winter air dries the rest, so humidifiers, filters, and ventilation even things out.
Learn more →Maintenance & Tune-Ups
A Fort Collins tune-up prepares the furnace for foothill storms and the AC for July heat, and checks safety controls.
Learn more →Commercial HVAC
Old Town shops, campus-area businesses, and offices near Horsetooth run rooftop units and split systems, and we keep them heating and cooling.
Learn more →Emergency HVAC Repair
A Fort Collins furnace that quits during a foothill storm gets a technician on the way when you call us.
Learn more →Radiant & Hydronic Heating
Radiant heat under a Lake Sherwood bathroom floor or a Foothills Green addition warms evenly, and we repair cold loops and install new ones.
Learn more →ERV Installation
River-valley humidity and sealed winter homes leave Fort Collins air stale, and an ERV brings in fresh air while holding onto heat.
Learn more →
Fort Collins Neighborhoods, Old Town to Horsetooth
We serve Fort Collins from Old Town to Horsetooth and Fossil Creek, including:
- Old Town
- Horsetooth
- Fossil Creek
- Brittany Knolls
- Huntington Hills
- Foothills Green
- Spring Canyon
- Quail Hollow
- Indian Hills
- Lake Sherwood
Old Town, Horsetooth, and the rest of Fort Collins fall in 80521, 80524, 80525, 80526, and 80528.
Fort Collins Landmarks: Old Town, Horsetooth, and CSU
Old Town anchors downtown, Horsetooth Reservoir sits west of town, and the Colorado State University campus sits near the city center. The Cache La Poudre River runs through town. UCHealth Poudre Valley Hospital serves the area, and Northern Colorado Regional Airport (FNL) sits east of town.
Common Questions in Fort Collins
Yes. We serve Old Town, Horsetooth, Fossil Creek, Brittany Knolls, Huntington Hills, Foothills Green, Spring Canyon, Quail Hollow, Indian Hills, and Lake Sherwood. Tell us your neighborhood when you call so we can plan the visit.
Homes near the Poudre River and Horsetooth Reservoir see more humidity than most Front Range homes. An oversized AC that short cycles leaves moisture behind, and poor ventilation adds to it. We check sizing, airflow, drainage, and ventilation to find the cause.
Old ductwork is a common cause. Historic homes often have ducts sized for a different era, with leaks and long runs that lose heat before it reaches the far rooms. Those historic-home ducts get an airflow check, a sealing pass, and a rebalance until every room warms up.
Yes. Modern cold-climate heat pumps heat through Fort Collins winters and cool in summer, and they have to handle both foothill cold snaps and river-valley humidity in places like Spring Canyon and Quail Hollow. We size them for the home and check defrost cycles, airflow, and refrigerant charge so they hold output on cold nights after a storm rolls down from the foothills.
Yes, when the air stays dry. An evaporative cooler fits Fort Collins low humidity, and we keep its pads, pumps, and water lines in working order. On humid stretches near the river, a refrigerated AC cools better.
Before the first foothill storm, fit a fresh filter, clear the vents and returns, and have the furnace checked ahead of a Horsetooth cold snap. We inspect burners, ignition, safety controls, and airflow, and we flag worn parts before a Horsetooth cold snap tests them.
Last updated: October 16, 2026.