868 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Mendon: Notturno Home Services, CR Score 65/100; 4.9★ from 1,586 Google reviews; open 24/7.
Best for emergencies (open 24/7): Nicholson Plumbing, Electrical, Heating, and Air Conditioning, posts 24/7 hours; ranked #2 of 868.
Most-reviewed: GEM Plumbing and Heating, 6,353 Google reviews at 4.6★, the most of 868 ranked; ranked #8.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
868 Mendon HVAC contractors are ranked here by CR Score, from ten published factors. 268 are open 24/7, 476 open Saturdays and 346 open Sundays, based on posted hours. The median Google rating is 4.8★ across 868 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Notturno Home Services | 65 | 4.9★ (1,586) | Blackstone, 7 mi away | 24/7 | Overall |
| 2 | Nicholson Plumbing, Electrical, Heating, and Air Conditioning | 64 | 4.8★ (2,950) | Holliston, 11 mi away | 24/7 | Emergencies |
| 3 | All-Temp Systems Mechanical, LLC | 64 | 4.9★ (533) | Milford, 3 mi away | 24/7 | — |
| 4 | G&C Plumbing & Heating | 64 | 4.9★ (990) | Franklin, 8 mi away | 24/7 | — |
| 5 | Landry Mechanical Inc Plumbing HVAC & Electric | 63 | 4.8★ (3,030) | Millbury, 12 mi away | 24/7 | — |
| 6 | Rodenhiser Home Services | 63 | 4.8★ (2,938) | Holliston, 6 mi away | Sat · Sun | — |
| 7 | Heritage Home Service | 63 | 4.9★ (2,563) | Auburn, 15 mi away | 24/7 | — |
| 8 | GEM Plumbing and Heating | 63 | 4.6★ (6,353) | Lincoln, 13 mi away | 24/7 | Most reviews |
| 9 | Accurate Baker Elman | 63 | 4.9★ (508) | Franklin, 7 mi away | 24/7 | — |
| 10 | CPS Heating & Cooling | 62 | 4.9★ (781) | Grafton, 12 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: 4.9★ from 1,586 Google reviews, listed on Google as “Heating contractor”.
Based in Holliston, 11 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 2,950 Google reviews, listed on Google as “HVAC contractor”.
Based in Milford, 3 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 533 Google reviews, listed on Google as “HVAC contractor”.
Based in Franklin, 8 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 990 Google reviews, listed on Google as “HVAC contractor”.
Based in Millbury, 12 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 3,030 Google reviews, listed on Google as “HVAC contractor”.
Based in Holliston, 6 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 2,938 Google reviews, listed on Google as “HVAC contractor”.
Based in Auburn, 15 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 2,563 Google reviews, listed on Google as “HVAC contractor”.
Based in Lincoln, 13 mi away
Ranked #8 because of its Google rating and review volume: 4.6★ from 6,353 Google reviews, the most in Mendon.
Based in Franklin, 7 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 508 Google reviews, listed on Google as “HVAC contractor”.
Based in Grafton, 12 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 781 Google reviews, listed on Google as “HVAC contractor”.
Based in Shrewsbury, 13 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 586 Google reviews, listed on Google as “HVAC contractor”.
Based in Framingham, 14 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 1,322 Google reviews, listed on Google as “HVAC contractor”.
Based in Mendon
Ranked #13 because of its Google rating and trade focus: 4.8★ from 112 Google reviews, listed on Google as “HVAC contractor”.
Based in Douglas, 3 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 107 Google reviews, listed on Google as “HVAC contractor”.
Based in Northborough, 17 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 1,017 Google reviews, listed on Google as “HVAC contractor”.
Based in Mendon
Ranked #16 because of its Google rating and trade focus: 4.8★ from 79 Google reviews, listed on Google as “HVAC contractor”.
Based in Uxbridge, 5 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 126 Google reviews, listed on Google as “HVAC contractor”.
Based in Smithfield, 14 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 694 Google reviews, listed on Google as “HVAC contractor”.
Based in Milford, 4 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 103 Google reviews, listed on Google as “HVAC contractor”.
Based in Framingham, 13 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 581 Google reviews, listed on Google as “HVAC contractor”.
Based in Auburn, 16 mi away
Ranked #21 because of its Google rating and trade focus: 4.7★ from 1,413 Google reviews, listed on Google as “HVAC contractor”.
Based in Attleboro, 15 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 400 Google reviews, listed on Google as “HVAC contractor”.
Based in Blackstone, 5 mi away
Ranked #23 because of its Google rating and review volume: 5.0★ from 602 Google reviews.
Based in Douglas, 6 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 81 Google reviews, listed on Google as “HVAC contractor”.
Based in Uxbridge, 5 mi away
Ranked #25 because of its Google rating and trade focus: 4.6★ from 130 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 868 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 |
|---|---|---|
| A & F Air Conditioning and Refrigeration | 5.0★ (2) | 7 mi |
| A. S. Jones & Co., Inc. | 5.0★ (1) | In Mendon |
| Affinity Exterior Corp | 5.0★ (2) | 10 mi |
| Alternative Creative Energy | 3.0★ (2) | 7 mi |
| Complete Heating & Cooling Tom Fricker | 4.8★ (529) | 9 mi |
| Dan & Sons Plumbing Heating | 3.0★ (2) | 8 mi |
| Deschene Mechanical LLC | 5.0★ (2) | 8 mi |
| Flaherty Plumbing & HVAC | 4.6★ (235) | 13 mi |
| FM HVAC | 5.0★ (2) | 8 mi |
| Hollister Plumbing And Heating LLC | 5.0★ (2) | 8 mi |
| J J Mechanical Services | In Mendon | |
| Jeff Harris Plumbing & Heating | 5.0★ (2) | 9 mi |
| JPD Plumbing & Heating LLC | 5.0★ (2) | 8 mi |
| Mac Donald Plumbing & Heating | 5.0★ (2) | 3 mi |
| Performance Plumbing And Heating, Inc. | 3.0★ (2) | 8 mi |
| Pete's Plumbing & Heating | 4.0★ (2) | 9 mi |
| Reliable Pipes Plumbing & Heating | 3.0★ (2) | 9 mi |
| Speed-up Services inc | 5.0★ (2) | 4 mi |
| Walsh's Plumbing & Heating corp | 3.5★ (2) | 8 mi |
| Weather Stone Masonry and Construction | 1.0★ (2) | 8 mi |
National price ranges in USD, not adjusted for Mendon. 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 Massachusetts, 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 868 Mendon 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 Mendon 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 |