Denver HVAC Contractor
Local Heating, Ventilation & Air Conditioning Solutions
Allen Service provides heating, cooling, ventilation and indoor air quality services for homeowners throughout Denver. From furnace repair during freezing winter weather to AC service during hot, dry summer conditions, our technicians help keep home comfort systems dependable through every season. As a Denver HVAC company serving Colorado homeowners since 1962, Allen Service provides repair, replacement and installation solutions focused on reliable performance, efficiency and long-term comfort.
Trusted Local HVAC Professionals
8661 Rosemary St, Commerce City, CO 80022
24/7 Emergency HVAC Repair in Denver
A furnace failure during freezing weather or an AC breakdown during extreme summer heat can require immediate attention. Allen Service provides 24/7 emergency HVAC repair in Denver for urgent heating and cooling problems unable to wait for a regular appointment. Call (720) 386-1965 when you need emergency HVAC service.
*Our emergency HVAC service covers system failures, not life-threatening situations. Call 911 first for fires, gas leaks, or injury risk.
HVAC Repair, Replacement & Installation Services in Denver
Denver HVAC systems need to handle regular freezing temperatures, summer highs near 90°F and a relatively dry climate. Allen Service provides HVAC repair, replacement and installation for equipment experiencing breakdowns, uneven temperatures, poor airflow or declining efficiency. Our technicians diagnose system concerns and recommend service based on your equipment, home layout and comfort needs.
Heating Services
Reliable heating is essential when Denver temperatures fall below freezing. Allen Service provides furnace repair, heating system replacement and new equipment installation for systems struggling with weak heat, frequent cycling, unusual noises or inconsistent temperatures. Our heating technicians identify the source of the problem and recommend the appropriate repair or replacement solution.
Air Conditioning Services
Denver summers bring hot, sunny conditions capable of placing steady demand on residential cooling equipment. Allen Service provides AC repair, replacement and installation for systems blowing warm air, operating continuously or struggling to maintain thermostat settings. Professional diagnostics help determine whether targeted service or new equipment offers the better long-term solution.
Ventilation & Air Quality Services
Dry air, household dust and uneven circulation can affect indoor comfort even when heating and cooling equipment operates normally. Allen Service provides ventilation and indoor air quality solutions designed to improve filtration, airflow and overall comfort. Better air distribution can also help your HVAC system maintain more consistent temperatures throughout your Denver home.
Heat Pump Services
Heat pumps provide both heating and cooling through a single system, giving Denver homeowners another option for year-round comfort. Allen Service provides heat pump repair, replacement and installation for existing equipment and new system upgrades. Our technicians can evaluate your current HVAC setup and recommend a heat pump solution suited to your home and efficiency goals.
HVAC Financing in Denver, CO
Replacing a furnace, air conditioner, heat pump or complete HVAC system can be a significant home investment. Allen Service offers HVAC financing options in Denver to help qualified homeowners manage the cost of necessary equipment upgrades. Financing can provide additional flexibility when aging equipment needs replacement or a sudden breakdown requires a larger repair.
Reasons To Call a Denver HVAC Company
Changes in airflow, temperature, sound or energy use can signal developing HVAC problems. Calling a Denver HVAC company when warning signs first appear can help restore comfort, reduce unnecessary equipment strain and lower the risk of a more disruptive breakdown.
Heating Issues
- Furnace struggles to maintain temperature: Burner, ignition or airflow problems may reduce heating output.
- Heating system cycles too frequently: Thermostat issues, restricted airflow or equipment problems can cause short cycling.
- Certain rooms stay colder than others: Ductwork or airflow imbalances may interfere with even heating.
- Furnace develops unusual noises: Grinding, rattling, banging or squealing can point to worn or loose components.
- Heating costs rise unexpectedly: Declining efficiency may cause equipment to run longer to maintain comfortable temperatures.
Cooling & AC Issues
- AC blows warm air: Refrigerant, compressor or electrical problems may interfere with cooling.
- Air conditioner runs continuously: Aging equipment or another performance issue may prevent the system from reaching the thermostat setting.
- Cooling varies between rooms: Duct restrictions or airflow problems can create uneven temperatures.
- Airflow from vents becomes weak: Blower problems, dirty components or duct restrictions may reduce circulation.
- Moisture collects near the indoor unit: Condensate drainage or another AC problem may require professional service.
General HVAC Problems
- Thermostat readings seem inaccurate: Calibration, sensor or wiring problems may affect system control.
- Equipment starts or stops unexpectedly: Electrical or control issues can interrupt normal operation.
- Unusual odors come through the vents: Dust buildup or equipment concerns may require inspection.
- Indoor air feels excessively dry or dusty: Filtration, ventilation or humidity-control improvements may help.
- Repairs are becoming more frequent: Recurring breakdowns can indicate aging equipment approaching replacement.
Do You Need a Permit to Replace an HVAC System in Denver?
Yes, in most cases. Denver requires mechanical permits for residential HVAC work involving forced-air heating systems, residential air conditioning, ductwork and related equipment. Many qualifying residential projects can use the city’s quick permit process, while projects outside quick-permit scope require additional plan review. Denver’s current permit system also applies energy-code requirements to replacement equipment.
For permitting questions and correspondence, contact Denver Community Planning and Development:
- 201 W. Colfax Ave., Dept. 205, Denver, CO 80202
- 720-865-2700
The Best Residential HVAC System for Denver Homes
The best HVAC system for a Denver home depends on square footage, insulation, ductwork, existing utilities and individual comfort goals. Denver experiences average winter lows around 20°F and July highs around 89°F, creating meaningful demand for both heating and cooling. The average single-family home is about 1,901 square feet, making proper equipment sizing important for efficient operation and balanced temperatures. A high-efficiency furnace paired with central air conditioning remains a practical option for many Denver homes. Heat pumps can also provide year-round heating and cooling, while variable-speed equipment may help improve temperature consistency and energy efficiency. Denver’s relatively dry climate can also make humidification, filtration and other indoor air quality improvements useful additions.
Climate Factors
Average in Denver
HVAC Impact
Winter Low
~20°F
Heating equipment needs dependable output during regular freezing temperatures
Summer High
~89°F
Cooling systems need adequate capacity for sustained summer heat
Average Home Size
~1,901 sq. ft.
Proper sizing helps prevent short cycling and uneven temperatures
Seasonal Humidity
Low to Moderate
Dry conditions can increase interest in humidification and indoor air quality solutions
More Services in Denver, CO
Our Service Areas
Allen Service serves homeowners and businesses throughout Denver Metro and Northern Colorado from our Commerce City and Fort Collins locations. Our service area reaches communities across the Front Range, giving customers access to one trusted team for heating, cooling, plumbing and electrical needs.