323 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Johnstown: Limelight Services, CR Score 67/100; 5.0★ from 1,508 Google reviews; open 24/7.
Best for emergencies (open 24/7): IMS Heating & Air, Inc., posts 24/7 hours; ranked #2 of 323.
Most-reviewed: Allen Service, 6,401 Google reviews at 4.8★, the most of 323 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
323 Johnstown HVAC contractors are ranked here by CR Score, from ten published factors. 124 are open 24/7, 184 open Saturdays and 157 open Sundays, based on posted hours. The median Google rating is 4.9★ across 323 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Limelight Services | 67 | 5.0★ (1,508) | Johnstown | 24/7 | Overall |
| 2 | IMS Heating & Air, Inc. | 65 | 4.8★ (1,518) | Berthoud, 4 mi away | 24/7 | Emergencies |
| 3 | One Hour Heating & Air Conditioning® of Loveland | 63 | 4.8★ (2,777) | Loveland, 12 mi away | 24/7 | — |
| 4 | Swan Plumbing Heating & Air Of Loveland | 63 | 4.8★ (2,466) | Loveland, 11 mi away | 24/7 | — |
| 5 | Lion Home Service | 63 | 4.7★ (5,912) | Fort Collins, 15 mi away | 24/7 | — |
| 6 | M and M Heating, Cooling, Plumbing and Electrical | 63 | 4.9★ (3,075) | Longmont, 16 mi away | 24/7 | — |
| 7 | Allen Service | 63 | 4.8★ (6,401) | Fort Collins, 19 mi away | 24/7 | Most reviews |
| 8 | Fort Collins Heating & Air Conditioning and Plumbing | 63 | 4.9★ (3,171) | Fort Collins, 19 mi away | 24/7 | — |
| 9 | MGI Mechanical Services | 62 | 4.9★ (229) | Berthoud, 4 mi away | 24/7 | — |
| 10 | Balance Point Heating, Cooling & Plumbing | 62 | 4.9★ (512) | Loveland, 9 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 1,508 Google reviews, listed on Google as “HVAC contractor”.
Based in Berthoud, 4 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 1,518 Google reviews, listed on Google as “Heating contractor”.
Based in Loveland, 12 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 2,777 Google reviews, listed on Google as “HVAC contractor”.
Based in Loveland, 11 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 2,466 Google reviews, listed on Google as “HVAC contractor”.
Based in Fort Collins, 15 mi away
Ranked #5 because of its Google rating and trade focus: 4.7★ from 5,912 Google reviews, listed on Google as “HVAC contractor”.
Based in Longmont, 16 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 3,075 Google reviews, listed on Google as “HVAC contractor”.
Based in Fort Collins, 19 mi away
Ranked #7 because of its Google rating and review volume: 4.8★ from 6,401 Google reviews, the most in Johnstown.
Based in Fort Collins, 19 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 3,171 Google reviews, listed on Google as “HVAC contractor”.
Based in Berthoud, 4 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 229 Google reviews, listed on Google as “HVAC contractor”.
Based in Loveland, 9 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 512 Google reviews, listed on Google as “HVAC contractor”.
Based in Loveland, 12 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 1,106 Google reviews, listed on Google as “HVAC contractor”.
Based in Greeley, 10 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 896 Google reviews, listed on Google as “HVAC contractor”.
Based in Frederick, 9 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 266 Google reviews, listed on Google as “HVAC contractor”.
Based in Berthoud, 10 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 626 Google reviews, listed on Google as “HVAC contractor”.
Based in Greeley, 12 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 384 Google reviews, listed on Google as “HVAC contractor”.
Based in Berthoud, 3 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 96 Google reviews, listed on Google as “HVAC contractor”.
Based in Longmont, 14 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 1,093 Google reviews, listed on Google as “HVAC contractor”.
Based in Longmont, 17 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 1,269 Google reviews, listed on Google as “HVAC contractor”.
Based in Windsor, 10 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 292 Google reviews, listed on Google as “HVAC contractor”.
Based in Fort Collins, 15 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 486 Google reviews, listed on Google as “HVAC contractor”.
Based in Greeley, 10 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 298 Google reviews, listed on Google as “HVAC contractor”.
Based in Loveland, 12 mi away
Ranked #22 because of its Google rating and trade focus: 4.6★ from 1,315 Google reviews, listed on Google as “HVAC contractor”.
Based in Berthoud, 6 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 84 Google reviews, listed on Google as “HVAC contractor”.
Based in Longmont, 16 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 865 Google reviews, listed on Google as “HVAC contractor”.
Based in Windsor, 9 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 402 Google reviews, listed on Google as “HVAC contractor”.
#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 323 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) | 11 mi |
| Colorado Clean Duct | In Johnstown | |
| Colorado Proud Heating and Cooling | 5.0★ (2) | 9 mi |
| E & E Quality Air Systems, LLC | 5.0★ (2) | 16 mi |
| Genesis Air Conditioning Repair | 5.0★ (2) | 9 mi |
| HAWF Mechanical | 5.0★ (2) | 9 mi |
| Highland Heating & Air, Inc. | 4.7★ (52) | 10 mi |
| Hines Corp | 5.0★ (2) | 15 mi |
| Ideal Comfort HVAC LLC | 4.3★ (66) | 4 mi |
| Independent Power - Fort Collins | 5.0★ (2) | 17 mi |
| Johnstown Heating and Cooling | In Johnstown | |
| Luminous Electric, Heating, & Cooling | 4.9★ (214) | 19 mi |
| MONTY'S HEATING AND AIR | 5.0★ (2) | 9 mi |
| Newt Plumbing Heating & Air | 5.0★ (2) | 9 mi |
| Polar Bear Plumbing Heating & Air | 5.0★ (541) | 10 mi |
| Shepard Plumbing and Heating and A/C | In Johnstown | |
| Stoney's Plumbing & Heating, LLC | 5.0★ (2) | 8 mi |
| Touchstone Commercial Building Services | 3.0★ (2) | 17 mi |
| U.S. Engineering | 1.0★ (1) | In Johnstown |
| XXXTREME SERVICES LLC | 4.9★ (40) | 9 mi |
National price ranges in USD, not adjusted for Johnstown. 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 323 Johnstown HVAC contractors on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, 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 Johnstown data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |