880 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Harvard: Papalia Home Services, CR Score 67/100; 4.9★ from 3,978 Google reviews; open 24/7.
Best for emergencies (open 24/7): MillTown Plumbing, Heating, Cooling and Electrical, posts 24/7 hours; ranked #3 of 880.
Most-reviewed: Sila Heating, Air Conditioning, Plumbing & Electrical, 4,377 Google reviews at 4.9★, the most of 880 ranked; ranked #23.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
880 Harvard HVAC contractors are ranked here by CR Score, from ten published factors. 285 are open 24/7, 474 open Saturdays and 347 open Sundays, based on posted hours. The median Google rating is 4.8★ across 880 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Papalia Home Services | 67 | 4.9★ (3,978) | Acton, 4 mi away | 24/7 | Overall |
| 2 | Nashoba Air & BoilerWorks | 64 | 4.9★ (1,833) | Acton, 6 mi away | Sat · Sun · Evenings | — |
| 3 | MillTown Plumbing, Heating, Cooling and Electrical | 63 | 4.8★ (2,927) | Chelmsford, 15 mi away | 24/7 | Emergencies |
| 4 | Precision Home Services | 63 | 4.9★ (1,017) | Northborough, 11 mi away | 24/7 | — |
| 5 | Wilson Brothers Heating & Air Conditioning, Inc. | 63 | 4.9★ (1,275) | Fitchburg, 12 mi away | 24/7 | — |
| 6 | A. Fagundes Plumbing & Heating Inc. | 62 | 4.8★ (1,626) | Billerica, 15 mi away | 24/7 | — |
| 7 | Central Cooling & Heating | 62 | 4.9★ (3,169) | Woburn, 22 mi away | 24/7 | — |
| 8 | CPS Heating & Cooling | 61 | 4.9★ (781) | Grafton, 16 mi away | 24/7 | — |
| 9 | Heritage Home Service | 61 | 4.9★ (2,563) | Auburn, 23 mi away | 24/7 | — |
| 10 | Nicholson Plumbing, Electrical, Heating, and Air Conditioning | 61 | 4.8★ (2,950) | Holliston, 22 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 3,978 Google reviews, listed on Google as “HVAC contractor”.
Based in Acton, 6 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 1,833 Google reviews, listed on Google as “HVAC contractor”.
Based in Chelmsford, 15 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 2,927 Google reviews, listed on Google as “HVAC contractor”.
Based in Northborough, 11 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 1,017 Google reviews, listed on Google as “HVAC contractor”.
Based in Fitchburg, 12 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 1,275 Google reviews, listed on Google as “HVAC contractor”.
Based in Billerica, 15 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 1,626 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Woburn, 22 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 3,169 Google reviews, listed on Google as “HVAC contractor”.
Based in Grafton, 16 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 781 Google reviews, listed on Google as “HVAC contractor”.
Based in Auburn, 23 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 2,563 Google reviews, listed on Google as “HVAC contractor”.
Based in Holliston, 22 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 2,950 Google reviews, listed on Google as “HVAC contractor”.
Based in Chelmsford, 16 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 443 Google reviews, listed on Google as “HVAC contractor”.
Based in Wilmington, 23 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 3,352 Google reviews, listed on Google as “HVAC contractor”.
Based in Acton, 8 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 223 Google reviews, listed on Google as “HVAC contractor”.
Based in Shrewsbury, 18 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 586 Google reviews, listed on Google as “HVAC contractor”.
Based in West Boylston, 15 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 748 Google reviews, listed on Google as “HVAC contractor”.
Based in Millbury, 23 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 3,030 Google reviews, listed on Google as “HVAC contractor”.
Based in Billerica, 17 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 476 Google reviews, listed on Google as “Heating contractor”.
Based in Framingham, 18 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 1,322 Google reviews, listed on Google as “HVAC contractor”.
Based in Watertown, 23 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 2,862 Google reviews, listed on Google as “HVAC contractor”.
Based in Milford, 24 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 1,832 Google reviews, listed on Google as “HVAC contractor”.
Based in Nashua, 19 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 793 Google reviews, listed on Google as “HVAC contractor”.
Based in Watertown, 21 mi away
Ranked #22 because of its Google rating and trade focus: 4.8★ from 1,625 Google reviews, listed on Google as “HVAC contractor”.
Based in Stoneham, 24 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 4,377 Google reviews, listed on Google as “HVAC contractor”.
Based in Maynard, 8 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 100 Google reviews, listed on Google as “HVAC contractor”.
Based in Chelmsford, 14 mi away
Ranked #25 because of its Google rating and trade focus: 4.7★ from 427 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 880 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&L Plumbing, Heating, and AC Repair | 4.6★ (174) | 13 mi |
| Cooling Unlimited, Inc. | 4.8★ (741) | 25 mi |
| D-E Corporation Sheet Metal/Welding HVAC Systems | 2.5★ (2) | 8 mi |
| David A. Longuemare Plumbing & Heating | 3.0★ (2) | 11 mi |
| Efficiency Pro Plumbing, Heating, Cooling & Drain Cleaning | 4.6★ (70) | 10 mi |
| Emanuelson Plumbing & Heating | 5.0★ (2) | 8 mi |
| Ferris Plumbing, Heating & Air | 4.9★ (320) | 22 mi |
| Fixer Connect Inc. | 5.0★ (2) | 10 mi |
| Full Spectrum Services | 4.8★ (101) | 13 mi |
| Hall Pump Sales and Service | 5.0★ (1) | In Harvard |
| Home Front Heating & Cooling | In Harvard | |
| HomeServe of New England | 4.7★ (872) | 23 mi |
| James Gardner Plumbing & Heating LLC | 5.0★ (2) | 12 mi |
| Jet Plumbing & Heating, Inc. | 5.0★ (2) | 7 mi |
| Kilpatrick HVAC | 5.0★ (2) | In Harvard |
| Kirouac Mechanical | 5.0★ (2) | 7 mi |
| Mass HVAC Comfort Solutions | 5.0★ (2) | 10 mi |
| Polomarenko Plumbing and Heating | 5.0★ (1) | In Harvard |
| Sahlberg Plumbing & Heating | 5.0★ (2) | 7 mi |
| Superior Heating and AC | 3.0★ (2) | 5 mi |
National price ranges in USD, not adjusted for Harvard. 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 880 Harvard 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 Harvard 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 |