1,218 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Millis: Nicholson Plumbing, Electrical, Heating, and Air Conditioning, CR Score 65/100; 4.8★ from 2,950 Google reviews; open 24/7.
Best for emergencies (open 24/7): G&C Plumbing & Heating, posts 24/7 hours; ranked #2 of 1,218.
Most-reviewed: GEM Plumbing and Heating, 6,353 Google reviews at 4.6★, the most of 1,218 ranked; ranked #11.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,218 Millis HVAC contractors are ranked here by CR Score, from ten published factors. 378 are open 24/7, 698 open Saturdays and 521 open Sundays, based on posted hours. The median Google rating is 4.8★ across 1,218 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Nicholson Plumbing, Electrical, Heating, and Air Conditioning | 65 | 4.8★ (2,950) | Holliston, 4 mi away | 24/7 | Overall |
| 2 | G&C Plumbing & Heating | 64 | 4.9★ (990) | Franklin, 7 mi away | 24/7 | Emergencies |
| 3 | Notturno Home Services | 64 | 4.9★ (1,586) | Blackstone, 11 mi away | 24/7 | — |
| 4 | Obie Comfort Solutions | 63 | 4.8★ (1,322) | Framingham, 8 mi away | 24/7 | — |
| 5 | Rodenhiser Home Services | 63 | 4.8★ (2,938) | Holliston, 6 mi away | Sat · Sun | — |
| 6 | Accurate Baker Elman | 63 | 4.9★ (508) | Franklin, 7 mi away | 24/7 | — |
| 7 | All-Temp Systems Mechanical, LLC | 63 | 4.9★ (533) | Milford, 8 mi away | 24/7 | — |
| 8 | Winters Home Services | 62 | 4.8★ (2,862) | Watertown, 17 mi away | 24/7 | — |
| 9 | Landry Mechanical Inc Plumbing HVAC & Electric | 62 | 4.8★ (581) | Framingham, 8 mi away | 24/7 | — |
| 10 | Akian Plumbing, Heating, Cooling & Electric | 62 | 4.8★ (1,625) | Watertown, 16 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 in Millis
Based in Holliston, 4 mi away
Ranked #1 because of its Google rating and trade focus: 4.8★ from 2,950 Google reviews, listed on Google as “HVAC contractor”.
Based in Franklin, 7 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 990 Google reviews, listed on Google as “HVAC contractor”.
Based in Blackstone, 11 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 1,586 Google reviews, listed on Google as “Heating contractor”.
Based in Framingham, 8 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 1,322 Google reviews, listed on Google as “HVAC contractor”.
Based in Holliston, 6 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 2,938 Google reviews, listed on Google as “HVAC contractor”.
Based in Franklin, 7 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 508 Google reviews, listed on Google as “HVAC contractor”.
Based in Milford, 8 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 533 Google reviews, listed on Google as “HVAC contractor”.
Based in Watertown, 17 mi away
Ranked #8 because of its Google rating and trade focus: 4.8★ from 2,862 Google reviews, listed on Google as “HVAC contractor”.
Based in Framingham, 8 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 581 Google reviews, listed on Google as “HVAC contractor”.
Based in Watertown, 16 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 1,625 Google reviews, listed on Google as “HVAC contractor”.
Based in Lincoln, 18 mi away
Ranked #11 because of its Google rating and review volume: 4.6★ from 6,353 Google reviews, the most in Millis.
Based in Grafton, 15 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 781 Google reviews, listed on Google as “HVAC contractor”.
Based in Natick, 8 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 234 Google reviews, listed on Google as “HVAC contractor”.
Based in Millbury, 21 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 3,030 Google reviews, listed on Google as “HVAC contractor”.
Based in Stoughton, 15 mi away
Ranked #15 because of its Google rating and trade focus: 4.6★ from 2,547 Google reviews, listed on Google as “HVAC contractor”.
Based in Millis
Ranked #16 because of its Google rating and trade focus: 4.8★ from 76 Google reviews, listed on Google as “HVAC contractor”.
Based in Acton, 25 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 3,978 Google reviews, listed on Google as “HVAC contractor”.
Based in Attleboro, 12 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 400 Google reviews, listed on Google as “HVAC contractor”.
Based in Auburn, 23 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 2,563 Google reviews, listed on Google as “HVAC contractor”.
Based in Quincy, 18 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 1,567 Google reviews, listed on Google as “HVAC contractor”.
Based in Needham, 12 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 259 Google reviews, listed on Google as “HVAC contractor”.
Based in Northborough, 18 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 1,017 Google reviews, listed on Google as “HVAC contractor”.
Based in Mansfield, 13 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 409 Google reviews, listed on Google as “HVAC contractor”.
Based in Braintree, 17 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 1,026 Google reviews, listed on Google as “Furnace repair service”.
Based in Shrewsbury, 19 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 586 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 1,218 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 |
|---|---|---|
| Affinity Exterior Corp | 5.0★ (2) | 4 mi |
| Air Temperature Systems Inc | 5.0★ (2) | 8 mi |
| Aspinwall Baystate Plumbing, Heating, Air Conditioning | 4.8★ (953) | 22 mi |
| Atlantic Heating & Air Conditioning | 4.8★ (353) | 16 mi |
| Delta HVAC Services Inc | 3.0★ (2) | 8 mi |
| Haskell Heating & Cooling | 5.0★ (30) | 4 mi |
| Joseph Kosh Plumbing & Heating | 5.0★ (2) | In Millis |
| Kushner Plumbing & Heating | 5.0★ (2) | 4 mi |
| Mac Donald Plumbing & Heating | 5.0★ (2) | 8 mi |
| MILLER PLUMBING, HEATING & COOLING, LLC | 5.0★ (2) | 10 mi |
| Obie Comfort Solutions | 5.0★ (2) | 10 mi |
| Park Plumbing | 5.0★ (2) | 10 mi |
| Performance Plumbing And Heating, Inc. | 3.0★ (2) | 3 mi |
| PureComfort Heating & Air Conditioning | 4.9★ (90) | 10 mi |
| PureComfort Heating, Air & Electric | 4.8★ (99) | 9 mi |
| Reliable Pipes Plumbing & Heating | 3.0★ (2) | 5 mi |
| Spectrum Heating And Cooling, Inc. | 5.0★ (2) | 10 mi |
| Target Air Systems | 4.7★ (95) | 7 mi |
| Trufant Industries, Inc. | 5.0★ (2) | 10 mi |
| Westwood Plumbing & Heating | 5.0★ (2) | 2 mi |
National price ranges in USD, not adjusted for Millis. 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 1,218 Millis 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 Millis 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 |