583 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Gunbarrel: M and M Heating, Cooling, Plumbing and Electrical, CR Score 92/100; 4.9★ from 3,075 Google reviews; open 24/7.
Best for emergencies (open 24/7): Welzig Heating, Air, Plumbing & Electric, posts 24/7 hours; ranked #2 of 583.
Most-reviewed: Jim Needham Heating Cooling Plumbing and Drain, 5,597 Google reviews at 4.9★, the most of 583 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
583 Gunbarrel HVAC contractors are ranked here by CR Score, from 8 published factors. 228 are open 24/7, 386 open Saturdays and 311 open Sundays, based on posted hours. The median Google rating is 4.8★ across 583 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | M and M Heating, Cooling, Plumbing and Electrical | 92 | 4.9★ (3,075) | Longmont, 7 mi away | 24/7 | Overall |
| 2 | Welzig Heating, Air, Plumbing & Electric | 91 | 4.9★ (1,269) | Longmont, 7 mi away | 24/7 | Emergencies |
| 3 | Cooper Heating & Cooling | 91 | 4.8★ (4,647) | Broomfield, 12 mi away | 24/7 | — |
| 4 | Jim Needham Heating Cooling Plumbing and Drain | 90 | 4.9★ (5,597) | Thornton, 18 mi away | 24/7 | Most reviews |
| 5 | Meyers Heating & Air Conditioning | 90 | 4.8★ (607) | Boulder, 4 mi away | 24/7 | — |
| 6 | TNT Home Services - Longmont | 89 | 4.8★ (865) | Longmont, 8 mi away | 24/7 | — |
| 7 | Blue Valley Heating & Cooling | 89 | 4.8★ (1,093) | Longmont, 10 mi away | 24/7 | — |
| 8 | Mesa Plumbing, Heating and Cooling | 89 | 4.7★ (731) | Boulder, 5 mi away | 24/7 | — |
| 9 | Aire Serv of the Front Range | 89 | 5.0★ (244) | Frederick, 10 mi away | 24/7 | — |
| 10 | Canyon Plumbing & Heating, Inc | 89 | 4.8★ (268) | Boulder, 5 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 in Gunbarrel
Based in Longmont, 7 mi away
Ranked #1 because of its Google rating and availability: 4.9★ from 3,075 Google reviews, open 24/7.
Based in Longmont, 7 mi away
Ranked #2 because of its Google rating and availability: 4.9★ from 1,269 Google reviews, open 24/7.
Based in Broomfield, 12 mi away
Ranked #3 because of its Google rating and availability: 4.8★ from 4,647 Google reviews, open 24/7.
Based in Thornton, 18 mi away
Ranked #4 because of its Google rating and availability: 4.9★ from 5,597 Google reviews, open 24/7.
Based in Boulder, 4 mi away
Ranked #5 because of its Google rating and availability: 4.8★ from 607 Google reviews, open 24/7.
Based in Longmont, 8 mi away
Ranked #6 because of its Google rating and availability: 4.8★ from 865 Google reviews, open 24/7.
Based in Longmont, 10 mi away
Ranked #7 because of its Google rating and availability: 4.8★ from 1,093 Google reviews, open 24/7.
Based in Boulder, 5 mi away
Ranked #8 because of its Google rating and availability: 4.7★ from 731 Google reviews, open 24/7.
Based in Frederick, 10 mi away
Ranked #9 because of its Google rating and availability: 5.0★ from 244 Google reviews, open 24/7.
Based in Boulder, 5 mi away
Ranked #10 because of its Google rating and availability: 4.8★ from 268 Google reviews, open 24/7.
Based in Thornton, 14 mi away
Ranked #11 because of its Google rating and availability: 4.9★ from 893 Google reviews, open 24/7.
Based in Arvada, 19 mi away
Ranked #12 because of its Google rating and availability: 4.9★ from 1,917 Google reviews, open 24/7.
Based in Boulder, 3 mi away
Ranked #13 because of its Google rating and availability: 4.9★ from 74 Google reviews, open 24/7.
Based in Denver, 25 mi away
Ranked #14 because of its Google rating and availability: 4.9★ from 3,583 Google reviews, open 24/7.
Based in Westminster, 13 mi away
Ranked #15 because of its Google rating and availability: 4.7★ from 1,623 Google reviews, open 24/7.
Based in Firestone, 13 mi away
Ranked #16 because of its Google rating and availability: 4.8★ from 710 Google reviews, open 24/7.
Based in Longmont, 9 mi away
Ranked #17 because of its Google rating and availability: 4.9★ from 205 Google reviews, open 24/7.
Based in Wheat Ridge, 20 mi away
Ranked #18 because of its Google rating and availability: 4.9★ from 1,352 Google reviews, open 24/7.
Based in Westminster, 15 mi away
Ranked #19 because of its Google rating and availability: 4.7★ from 1,928 Google reviews, open 24/7.
Based in Denver, 22 mi away
Ranked #20 because of its Google rating and availability: 4.8★ from 3,635 Google reviews, open 24/7.
Based in Lafayette, 5 mi away
Ranked #21 because of its Google rating and availability: 5.0★ from 64 Google reviews, open 24/7.
Based in Golden, 20 mi away
Ranked #22 because of its Google rating and availability: 4.7★ from 4,159 Google reviews, open 24/7.
Based in Berthoud, 14 mi away
Ranked #23 because of its Google rating and availability: 4.8★ from 626 Google reviews, open 24/7.
Based in Commerce City, 23 mi away
Ranked #24 because of its Google rating and availability: 4.8★ from 3,443 Google reviews, open 24/7.
Based in Broomfield, 10 mi away
Ranked #25 because of its Google rating and availability: 4.8★ from 267 Google reviews, open 24/7.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 583 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| 4Therm Mechanical, Inc. | 5.0★ (2) | 17 mi |
| Advanced Air-Kleaning Tech | 5.0★ (2) | In Gunbarrel |
| Allen's Heating Air Conditioning & Sheet Metal Inc | 5.0★ (2) | 19 mi |
| Altitude Building Automation | 5.0★ (2) | 20 mi |
| ASI Heating and Air Conditioning | 5.0★ (2) | 15 mi |
| Basin Breeze | In Gunbarrel | |
| Boulder HVAC Services | 1.5★ (2) | 2 mi |
| Breathe Easy Duct Cleaning and Restoration | 3.0★ (2) | 5 mi |
| Colorado Proud Heating and Cooling | 5.0★ (2) | 15 mi |
| E & E Quality Air Systems, LLC | 5.0★ (2) | 13 mi |
| Express HVAC Repair | 4.9★ (55) | 7 mi |
| Front Range Radiant, Inc. | 5.0★ (2) | 18 mi |
| KEY Heating and Air, LLC | 5.0★ (2) | 18 mi |
| Lucas Boilers | 5.0★ (2) | 12 mi |
| Moreno HVAC LLC | 5.0★ (2) | 16 mi |
| Newt Plumbing Heating & Air | 5.0★ (2) | 14 mi |
| Northern Climate Control | 5.0★ (2) | 15 mi |
| Standard Renewable Energy | 1.5★ (2) | 4 mi |
| Tico HVAC LLC | 5.0★ (294) | 12 mi |
| Touchstone Commercial Building Services | 3.0★ (2) | 6 mi |
National price ranges in USD, not adjusted for Gunbarrel. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In Colorado, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.
We scored 583 Gunbarrel HVAC contractors on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Gunbarrel data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |