Denver
Office: Mon–Fri 7 am–7 pm, Sat 8 am–4 pm
Emergency line 24/7, holidays included
(303) 555-0167Halvorsen Heating & Air has kept Denver homes warm in January and cool in July since 1988. You get a flat-rate price in writing before any work, from technicians who are paid by the hour and earn no commission on what you buy.
Denver time · · ·
Enter your ZIP code. You'll see who covers your street and the earliest window we usually offer at this hour, on Denver time.
Windows follow our usual dispatch rules for this time of day in Denver. The office confirms your exact window by phone when you book.
Your technician appears here
Four technicians, four zones. Type a ZIP code and we'll show who covers it and the earliest window at this hour.
Marcus
Senior technician, east side · Van 3
Mateo
Technician, west side · Van 7
Dana
Technician, north side · Van 5
Priya
Technician, south side · Van 9
Find your situation, then do the first step before you call. Two of these are about safety, and they come before anything we can do.
You smell gas
Leave the house now without touching any switch. From outside, call 911 and Xcel Energy's gas line at 1-800-895-2999. Call us once they say it's safe.
The carbon monoxide alarm is going off
Get everyone outside to fresh air and call 911. Don't look for the source.
No heat at all
Check that the thermostat is on Heat, the furnace switch is on and the white vent pipes outside aren't packed with snow. Still cold? Call us, day or night.
Water around the furnace
Turn the system off at the thermostat and put towels down. It's usually a clogged condensate drain.
The AC runs but the house won't cool
If you see ice on the copper lines, switch the system off and leave the fan on to thaw it. Then book a visit.
The system is 15 years old or more
Get both numbers before the next breakdown. The replacement estimate is free.
Nothing's wrong yet
A tune-up before each season catches most breakdowns before the first cold night.
Sources: Xcel Energy, news release of January 21, 2026; U.S. Consumer Product Safety Commission, Carbon Monoxide Fact Sheet.
Denver is hard on equipment in ways a manual written for sea level doesn't cover. These are the five things we deal with every season.
5,280 ft
At a mile high, every cubic foot of air holds about 17 percent less oxygen than at sea level. A furnace left on its sea-level setup burns rich, soots up and wears out its heat exchanger. We set every furnace to the manufacturer's high-altitude instructions and check it with a combustion analyzer.
−10°F
Denver can go from a sunny afternoon to a below-zero night in a day. The first cold night is when weak igniters, dirty flame sensors and tired inducer motors give up. Plan members get their tune-up in the fall, before it happens.
May–Aug
Hail flattens the thin aluminum fins of air conditioners and heat pumps and chokes their airflow. Most units can be combed straight and keep running. We check that before anyone talks about a new unit.
May & Oct
Evaporative coolers still sit on many 1950s to 1970s ranches across the metro, and in Denver's dry summers they cool for a fraction of what central air costs to run. They need a start-up in May and a shutdown before the first hard freeze, or the water line splits.
0°F
Cold-climate heat pumps keep heating at 0°F and below, and backup heat or a gas furnace takes over on the coldest nights. In winter the outdoor unit steams for a minute while it defrosts. That's normal.
The same flat-rate book for every technician, day or night. You approve the price before we pick up a tool.
One or two tune-ups a year, no diagnostic fee, priority when Denver turns cold or hot, and 10 to 15 percent off repairs. Nothing is charged until your first visit is done.
4.8
Google rating, 947 reviews
Mateo found that our old furnace had never been set up for the altitude. That explained the soot on the vent. The new one runs clean and quiet, and the invoice matched the estimate to the dollar.
Linda M.Lakewood
Good work on our swamp cooler, but our first appointment got pushed back a day during the August heat wave. Dana called the night before to tell us, which I appreciated.
Dave R.Arvada
Furnace quit at 11 pm on the coldest night of the year. A person answered, Dana called back in ten minutes and the heat was back on before 1 am. She showed me the cracked igniter before replacing it.
Rachel P.Westminster
Each technician starts the day in their own part of town, so the person who comes to your house usually knows your neighborhood's houses.
Senior technician, east side
Aurora, east Denver, Centennial east of I‑25, Parker
With us since 2004. He trains every new technician and takes most of our heat pump calls. Ask him why your heat pump steams in January.
Technician, west side
Lakewood, Wheat Ridge, Golden, west and central Denver
Joined in 2016 after trade school in Denver. He knows the 1950s basements of Lakewood and Wheat Ridge by heart, and he checks the altitude setup on every furnace he opens.
Technician, north side
Arvada, Westminster, Thornton, Broomfield, Commerce City
Fourteen years in the trade, nine with us. She's our swamp cooler specialist, and the one we send when the furnace is in a tight attic.
Technician, south side
Littleton, Englewood, Centennial, Highlands Ranch, south Denver
Joined in 2021. She runs our hail-season condenser checks and most of our ductless mini-split installs.
Our shop is on South Santa Fe Drive in Denver. Four technicians cover four zones of the metro, and two of them are on call every night.
Something else? Call (303) 555-0167. A person answers at any hour.
During office hours, usually the same day if you call before noon. At night the on-call technician is usually at the door in 45 to 90 minutes, depending on where you live and how many no-heat calls are open. The board near the top of this page shows the usual window for your ZIP right now.
$89 on weekdays and Saturdays, credited to the repair if you go ahead the same day. $179 at night, on Sundays and holidays. Repair prices come from the same flat-rate book day and night.
Yes. Start-ups, shutdowns, pads, pumps, motors and full replacements. Spring start-up is $165 and the fall shutdown $145.
Cold-climate models keep heating at 0°F and below. On the coldest nights backup heat or a gas furnace takes over. We size both for your house.
No. Setting a furnace up for 5,280 feet is part of every install and every tune-up.
Replacement estimates are free and in writing. Repairs start with the $89 daytime visit, credited to the repair.
Most major brands of furnaces, air conditioners, heat pumps, boilers and swamp coolers. For new systems we recommend models we can get parts for quickly in Denver.
Tell us what's going on. During office hours we call back within the hour with a window, usually the same day if you write before noon.
Office: Mon–Fri 7 am–7 pm, Sat 8 am–4 pm
Emergency line 24/7, holidays included
2250 S Santa Fe Dr, Unit 6Free parking in front of Unit 6. The front counter is at street level with a ramp and is wheelchair accessible. Furnace filters and thermostat batteries are sold at the counter on weekdays from 7 am to 5 pm. Get directions
office@halvorsenheatingair.com
Request sent. A confirmation email is on its way.
During office hours we call back within the hour with a window. After hours, first thing in the morning.