1,128 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Lowell: MillTown Plumbing, Heating, Cooling and Electrical, CR Score 94/100; 4.8★ from 2,927 Google reviews; open 24/7.
Best for emergencies (open 24/7): Mike Giasullo Oil Burner Service Inc., posts 24/7 hours; ranked #2 of 1,128.
Most-reviewed: Heritage Home Service, 7,956 Google reviews at 4.8★, the most of 1,128 ranked; ranked #15.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,128 Lowell HVAC contractors are ranked here by CR Score, from 8 published factors. 342 are open 24/7, 609 open Saturdays and 461 open Sundays, based on posted hours. The median Google rating is 4.9★ across 1,128 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | MillTown Plumbing, Heating, Cooling and Electrical | 94 | 4.8★ (2,927) | Chelmsford, 2 mi away | 24/7 | Overall |
| 2 | Mike Giasullo Oil Burner Service Inc. | 92 | 5.0★ (476) | Billerica, 3 mi away | 24/7 | Emergencies |
| 3 | 128 Plumbing, Heating, Cooling & Electric | 92 | 5.0★ (443) | Chelmsford, 3 mi away | 24/7 | — |
| 4 | Central Cooling & Heating | 92 | 4.9★ (3,169) | Woburn, 12 mi away | 24/7 | — |
| 5 | Papalia Home Services | 92 | 4.9★ (3,978) | Acton, 13 mi away | 24/7 | — |
| 6 | A. Fagundes Plumbing & Heating Inc. | 92 | 4.8★ (1,626) | Billerica, 5 mi away | 24/7 | — |
| 7 | Heritage Home Service | 92 | 4.8★ (3,352) | Wilmington, 9 mi away | 24/7 | — |
| 8 | 128 Plumbing, Heating, Cooling & Electric | 91 | 4.9★ (3,912) | Wakefield, 15 mi away | 24/7 | — |
| 9 | 128 Plumbing, Heating, Cooling & Electric | 90 | 5.0★ (562) | North Andover, 11 mi away | 24/7 | — |
| 10 | Cool-Rite Mechanical Inc. | 90 | 4.9★ (183) | Chelmsford, 1 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 Lowell
Based in Chelmsford, 2 mi away
Ranked #1 because of its Google rating and availability: 4.8★ from 2,927 Google reviews, open 24/7.
Based in Billerica, 3 mi away
Ranked #2 because of its Google rating and availability: 5.0★ from 476 Google reviews, open 24/7.
Based in Chelmsford, 3 mi away
Ranked #3 because of its Google rating and availability: 5.0★ from 443 Google reviews, open 24/7.
Based in Woburn, 12 mi away
Ranked #4 because of its Google rating and availability: 4.9★ from 3,169 Google reviews, open 24/7.
Based in Acton, 13 mi away
Ranked #5 because of its Google rating and availability: 4.9★ from 3,978 Google reviews, open 24/7.
Based in Billerica, 5 mi away
Ranked #6 because of its Google rating and availability: 4.8★ from 1,626 Google reviews, open 24/7.
Based in Wilmington, 9 mi away
Ranked #7 because of its Google rating and availability: 4.8★ from 3,352 Google reviews, open 24/7.
Based in Wakefield, 15 mi away
Ranked #8 because of its Google rating and availability: 4.9★ from 3,912 Google reviews, open 24/7.
Based in North Andover, 11 mi away
Ranked #9 because of its Google rating and availability: 5.0★ from 562 Google reviews, open 24/7.
Based in Chelmsford, 1 mi away
Ranked #10 because of its Google rating and availability: 4.9★ from 183 Google reviews, open 24/7.
Based in Fitchburg, 13 mi away
Ranked #11 because of its Google rating and availability: 4.9★ from 1,275 Google reviews, open 24/7.
Based in Lowell
Ranked #12 because of its Google rating and availability: 5.0★ from 86 Google reviews, open 24/7.
Based in Nashua, 11 mi away
Ranked #13 because of its Google rating and availability: 4.9★ from 793 Google reviews, open 24/7.
Based in Lowell
Ranked #14 because of its Google rating and availability: 4.8★ from 185 Google reviews, open 24/7.
Based in Auburn, 23 mi away
Ranked #15 because of its Google rating and review volume: 4.8★ from 7,956 Google reviews, the most Google reviews on this list (7,956).
Based in Lowell
Ranked #16 because of its Google rating and availability: 4.9★ from 94 Google reviews, open 24/7.
Based in Haverhill, 13 mi away
Ranked #17 because of its Google rating and availability: 5.0★ from 449 Google reviews, open 24/7.
Based in Pinehurst, 4 mi away
Ranked #18 because of its Google rating and availability: 4.8★ from 265 Google reviews, open 24/7.
Based in Tewksbury, 7 mi away
Ranked #19 because of its Google rating and availability: 4.8★ from 444 Google reviews, open 24/7.
Based in Danvers, 21 mi away
Ranked #20 because of its Google rating and availability: 4.8★ from 4,220 Google reviews, open 24/7.
Based in Tewksbury, 5 mi away
Ranked #21 because of its Google rating and availability: 4.8★ from 223 Google reviews, open 24/7.
Based in Chelmsford, 6 mi away
Ranked #22 because of its Google rating and availability: 4.7★ from 427 Google reviews, open 24/7.
Based in Wilmington, 11 mi away
Ranked #23 because of its Google rating and availability: 4.6★ from 2,076 Google reviews, open 24/7.
Based in Watertown, 20 mi away
Ranked #24 because of its Google rating and availability: 4.8★ from 2,862 Google reviews, open 24/7.
Based in Reading, 13 mi away
Ranked #25 because of its Google rating and availability: 4.8★ from 741 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 1,128 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 |
|---|---|---|
| All Seasons Cooling & Heating | In Lowell | |
| B J Doyle Heating & Air Conditioning | 5.0★ (2) | 7 mi |
| Boston Air Conditioning | In Lowell | |
| Burlington Plumbing & Heating | 3.0★ (2) | 2 mi |
| Carlson Hvac Inc | 3.0★ (2) | 7 mi |
| Dracut Plumbing & Heating | 3.0★ (2) | 4 mi |
| Harley Weymouth Plumbing & Heating | 5.0★ (2) | 6 mi |
| HARVARD PLUMBING & HEATING | 5.0★ (2) | 5 mi |
| Hunter & Sons AC Heating & Cooling | 4.8★ (71) | In Lowell |
| John Mason Services | In Lowell | |
| L&A Comfort Mechanical | In Lowell | |
| M&M Air Duct Cleaning & Dryer Vent Cleaning Services Of MA | 5.0★ (2) | In Lowell |
| Mahoney Plumbing & Heating | 5.0★ (2) | 4 mi |
| Mikey Pipes Plumbing & Heating LLC | 5.0★ (2) | 7 mi |
| Minutemen Corporation | 5.0★ (31) | 2 mi |
| O P Viau & Sons Inc | 2.0★ (1) | In Lowell |
| Quality cooling services | In Lowell | |
| Reliable Refrigeration Inc | 5.0★ (2) | In Lowell |
| Sor Construction Corp | In Lowell | |
| Tyngsboro Plumbing & Heating | 5.0★ (2) | 4 mi |
National price ranges in USD, not adjusted for Lowell. 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 1,128 Lowell 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 Lowell 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 |