65/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 793 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 793 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 35 E Hollis St, Nashua, NH 03060
Best HVAC Contractors in Nashua, NH (2026)
640 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Nashua: Walley's Heating & Air, CR Score 65/100; 4.9★ from 793 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Heritage Home Service, posts 24/7 hours; ranked #2 of 640.
- 2
Most-reviewed: Heritage Home Service, 7,956 Google reviews at 4.8★, the most of 640 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
640 Nashua HVAC contractors are ranked here by CR Score, from ten published factors. 185 are open 24/7, 312 open Saturdays and 221 open Sundays, based on posted hours. The median Google rating is 4.9★ across 640 rated businesses.
Top 10 HVAC contractors in Nashua at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Walley's Heating & Air | 65 | 4.9★ (793) | Nashua | 24/7 | Overall |
| 2 | Heritage Home Service | 64 | 4.8★ (7,956) | Auburn, 15 mi away | 24/7 | Emergencies, Most reviews |
| 3 | A. Fagundes Plumbing & Heating Inc. | 64 | 4.9★ (348) | Nashua | 24/7 | — |
| 4 | Wilson Brothers Heating & Air Conditioning, Inc. | 64 | 4.9★ (1,275) | Fitchburg, 8 mi away | 24/7 | — |
| 5 | A. Fagundes Plumbing & Heating Inc. | 63 | 4.8★ (1,626) | Billerica, 8 mi away | 24/7 | — |
| 6 | MillTown Plumbing, Heating, Cooling and Electrical | 63 | 4.8★ (2,927) | Chelmsford, 12 mi away | 24/7 | — |
| 7 | Sanford Temperature Control | 63 | 4.9★ (1,832) | Milford, 13 mi away | 24/7 | — |
| 8 | Papalia Home Services | 63 | 4.9★ (3,978) | Acton, 18 mi away | 24/7 | — |
| 9 | Joyce Cooling & Heating Inc. | 63 | 4.9★ (5,079) | Nashua | — | — |
| 10 | High Ground Service Pros - Plumbers Electricians & HVAC Technicians | 63 | 4.9★ (2,303) | Manchester, 16 mi away | 24/7 | — |
The 640 best HVAC contractors in Nashua, ranked
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.
Based in Auburn, 15 mi away
64/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 7,956 Google reviews, the most in Nashua.
- 4.8★ from 7,956 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 28 Commercial Ct, Auburn, NH 03032
Based in Nashua
64/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 348 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 348 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 230 Amherst St Unit 103, Nashua, NH 03063
Based in Fitchburg, 8 mi away
64/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 1,275 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,275 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 35 Lomar Park Dr, Pepperell, MA 01463
Based in Billerica, 8 mi away
63/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.8★ from 1,626 Google reviews, listed on Google as “Air conditioning contractor”.
- 4.8★ from 1,626 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 116 Pawtucket Blvd, Tyngsborough, MA 01879
Based in Chelmsford, 12 mi away
63/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.8★ from 2,927 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 2,927 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 131 Stedman St #6, Chelmsford, MA 01824
Based in Milford, 13 mi away
63/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.9★ from 1,832 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,832 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 96 Old Wilton Rd #1, Milford, NH 03055
Based in Acton, 18 mi away
63/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 3,978 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 3,978 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1220 Liberty Square Rd, Boxborough, MA 01719
Based in Nashua
63/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 5,079 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 5,079 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat–Sun closed
- Address
- 51 Lake St, Nashua, NH 03060
Based in Manchester, 16 mi away
63/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 2,303 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 2,303 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 201 Allard Dr, Manchester, NH 03102
Based in Litchfield, 7 mi away
62/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 320 Google reviews, listed on Google as “Air conditioning contractor”.
- 4.9★ from 320 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 17 Old Nashua Rd Unit 1B, Amherst, NH 03031
Based in Nashua
62/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.9★ from 77 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 77 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 32 April Dr, Nashua, NH 03062
Based in Wilmington, 20 mi away
61/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 3,352 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 3,352 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 323 Andover St STE 2, Wilmington, MA 01887
Based in Billerica, 15 mi away
61/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 476 Google reviews, listed on Google as “Heating contractor”.
- 5.0★ from 476 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 98 Billerica Ave B, North Billerica, MA 01862
Based in Chelmsford, 14 mi away
61/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 443 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 443 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 80 Brick Kiln Rd, Chelmsford, MA 01824
Based in Woburn, 24 mi away
61/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.9★ from 3,169 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 3,169 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9 N Maple St, Woburn, MA 01801
Based in Chelmsford, 8 mi away
61/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.7★ from 427 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 427 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 21 Westech Dr, Tyngsborough, MA 01879
Based in Acton, 15 mi away
61/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 1,833 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,833 Google reviews
- Hours
- Mon–Sun 7 AM–10 PM
- Address
- 527 Great Rd, Littleton, MA 01460
Based in Bedford, 14 mi away
61/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.8★ from 683 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 683 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 45 S River Rd, Bedford, NH 03110
Based in Londonderry, 11 mi away
61/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.8★ from 433 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 433 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 39 Rockingham Rd, Londonderry, NH 03053
Based in Manchester, 15 mi away
60/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ from 454 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 454 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 326 Lincoln St, Manchester, NH 03103
Based in Haverhill, 18 mi away
60/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 449 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 449 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 12 Bond St, Haverhill, MA 01835
Based in North Andover, 19 mi away
60/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 562 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 562 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3 Johnson St, North Andover, MA 01845
Based in Manchester, 15 mi away
60/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.7★ from 598 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 598 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 76 Maple St, Manchester, NH 03103
Based in Chelmsford, 12 mi away
60/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.9★ from 183 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 183 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
HVAC contractors ranked #26 to #50
#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 640 ranked HVAC contractors here; the rest are on their profiles.
Also serving Nashua
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&E Commercial Air | In Nashua | |
| Allied plumbing and heating | 5.0★ (2) | 11 mi |
| Borelli Plumbing & Heating | 5.0★ (2) | 10 mi |
| City Fuel | 4.6★ (101) | 15 mi |
| Denommee Plumbing, HVAC & Electric | 4.9★ (51) | 10 mi |
| E STAR HVAC LLC. | In Nashua | |
| Extreme Temp | 5.0★ (1) | In Nashua |
| Fuel NRG | 4.5★ (94) | 13 mi |
| Generator Pro | 4.9★ (78) | In Nashua |
| Harley Weymouth Plumbing & Heating | 5.0★ (2) | 10 mi |
| Homeworks Heating and Air Conditioning | 3.0★ (2) | 10 mi |
| Hunter & Sons AC Heating & Cooling | 4.8★ (71) | 13 mi |
| James Gardner Plumbing & Heating LLC | 5.0★ (2) | 8 mi |
| JLEMOS HVAC | 5.0★ (2) | In Nashua |
| LHR Plumbing, Heating & AC Repair | 4.9★ (128) | 17 mi |
| Mikey Pipes Plumbing & Heating LLC | 5.0★ (2) | 10 mi |
| Milltown Plumbing, Heating, Air Conditioning, Drain Cleaning & Electrical | In Nashua | |
| Nick’s Heating and Cooling | 5.0★ (2) | 5 mi |
| Purple HVAC | 5.0★ (2) | In Nashua |
| Tyngsboro Plumbing & Heating | 5.0★ (2) | 9 mi |
How much do HVAC contractors cost in Nashua?
National price ranges in USD, not adjusted for Nashua. 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 |
When to hire an HVAC contractor in New Hampshire
In New Hampshire, 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.
How we ranked Nashua HVAC contractors
We scored 640 Nashua 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 Nashua 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 |
HVAC contractors in Nashua: frequently asked questions
Who is the best HVAC contractor in Nashua?
By CR Score, the highest-ranked HVAC contractor in Nashua, NH is Walley's Heating & Air with a CR Score of 65/100. It has 4.9★ from 793 Google reviews. It is open 24/7. Heritage Home Service (#2) and A. Fagundes Plumbing & Heating Inc. (#3) follow. We ranked 640 HVAC contractors on ten factors, last updated October 22, 2026.
How many HVAC contractors are there in Nashua?
ContractorsRanked ranks 640 HVAC contractors serving Nashua, NH. 6 of them are based in Nashua; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in Nashua are open 24/7?
185 ranked HVAC contractors in Nashua post 24/7 hours. The highest-ranked are Walley's Heating & Air (#1), Heritage Home Service (#2) and A. Fagundes Plumbing & Heating Inc. (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Nashua work on weekends?
312 of 640 ranked HVAC contractors post Saturday hours and 221 post Sunday hours. The highest-ranked open Saturdays are Walley's Heating & Air (#1), Heritage Home Service (#2) and A. Fagundes Plumbing & Heating Inc. (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does ac replacement cost in Nashua?
AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Nashua. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Nashua HVAC contractors have?
The median Google rating among 640 rated HVAC contractors in Nashua is 4.9★, with a median of 18 reviews. Heritage Home Service has the most, 7,956 reviews, and ranks #2. We adjust ratings for review count, so a few five-star reviews cannot top the list.
When is the best time to hire an HVAC contractor in Nashua?
In New Hampshire, 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.
How does ContractorsRanked rank HVAC contractors?
Each HVAC contractor gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Update log for Nashua
- October 2026: CR Scores recalculated for 640 hvac contractors serving Nashua.
- October 2026: 7 duplicate listings merged.
More HVAC contractors and Nashua pages
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Other trades in Nashua
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- Electricians in Nashua406 ranked
- General contractors in Nashua626 ranked
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- Landscapers in Nashua240 ranked
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- Kitchen remodelers in Nashua342 ranked
- Bathroom remodelers in Nashua334 ranked
- Flooring contractors in Nashua216 ranked
- Tile installers in Nashua40 ranked
- Drywall contractors in Nashua16 ranked
- Concrete contractors in Nashua109 ranked
- Fence contractors in Nashua100 ranked
- Deck builders in Nashua187 ranked
- Siding contractors in Nashua500 ranked
- Window installers in Nashua402 ranked
- Gutter installers in Nashua117 ranked
- Insulation contractors in Nashua64 ranked
- Solar installers in Nashua139 ranked
- Garage door repair companies in Nashua69 ranked
- Foundation repair companies in Nashua166 ranked
- Tree services in Nashua221 ranked
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- Water damage restoration companies in Nashua402 ranked
- Home builders in Nashua469 ranked
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