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Emergency HVAC Contractors in Newmarket, NH (2026)

Top 50 of 275 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

If you smell gas, leave the building now and call your gas utility or 911 from outside.

The short answer

  1. 1

    #1 for emergency heating and cooling in Newmarket: Heritage Home Service, open 24/7.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

Top emergency HVAC contractors in Newmarket at a glance

Top emergency HVAC contractors in Newmarket at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Heritage Home Service934.9★ (2,248)Hampton, 9 mi away24/7
2Key Heating & Air Conditioning914.8★ (692)Exeter, 6 mi away24/7
3Heritage Home Service904.8★ (7,956)Auburn, 23 mi away24/7
4HeatPro HVAC904.8★ (138)Chester, 1 mi away24/7
5East Coast Gas Fitters, LLC875.0★ (38)Exeter, 6 mi away24/7
6JP HVAC - Heating & Cooling875.0★ (35)Exeter, 6 mi away24/7
7Patriot Oil Burner Service875.0★ (263)Chester, 19 mi away24/7
8Northeast Heating & Cooling875.0★ (449)Haverhill, 24 mi away24/7
9NextGen Aire864.8★ (271)Amesbury, 17 mi away24/7
10Heritage Home Service864.9★ (45)Portsmouth, 9 mi away24/7

Call an emergency HVAC contractor in Newmarket now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency HVAC contractors in Newmarket, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 275 is on the HVAC contractors page.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  9. #9 NextGen Aire

    Based in Amesbury, 17 mi away

    86/100CR Score

    Ranked #9 because of its Google rating and availability: 4.8★ from 271 Google reviews, open 24/7.

    • 4.8★ from 271 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    31 S Hunt Rd, Amesbury, MA 01913
    View profile for NextGen Aire(978) 566-9601

  15. #15 Pilot Plumbing, Heating and Cooling | Plumber, Tankless Water Heater Repair & Installation | Heating & AC Repair Sandown, NH

    Based in Sandown, 14 mi away

    85/100CR Score

    Ranked #15 because of its Google rating and availability: 5.0★ from 51 Google reviews, open 24/7.

    • 5.0★ from 51 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    265 Fremont Rd, Sandown, NH 03873
    View profile for Pilot Plumbing, Heating and Cooling | Plumber, Tankless Water Heater Repair & Installation | Heating & AC Repair Sandown, NH(603) 634-8531

  23. #23 BRR HVAC/R

    Based in Biddeford, 1 mi away

    84/100CR Score

    Ranked #23 because of its Google rating and availability: 5.0★ from 5 Google reviews, open 24/7.

    • 5.0★ from 5 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for BRR HVAC/R(207) 494-4334

Top 50 of 275 HVAC contractors by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

HVAC contractors in Newmarket, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Palmer and Sicard, Inc.843.9★ (20)7 mi
27SRV Plumbing and Heating845.0★ (58)7 mi
28Proactive Heating & Cooling835.0★ (12)8 mi
29Dry Air Systems Inc834.7★ (61)20 mi
30HomeWiz834.6★ (163)23 mi
31Traditional Oil Heating Services835.0★ (33)20 mi
32Comfort Services LLC835.0★ (22)13 mi
33Stevens Mechanical834.9★ (9)13 mi
34Townsend Energy833.7★ (71)8 mi
35Capstone Mechanical823.4★ (5)8 mi
36Extreme Plumbing824.7★ (51)23 mi
37Cal's Air Conditioning & Heating825.0★ (18)21 mi
38Murphy's HVAC LLC825.0★ (11)17 mi
39Coltella Heating & Cooling825.0★ (9)17 mi
40Colonial Plumbing & Heating814.7★ (32)25 mi
41Marine Refrigeration & Air Conditioning815.0★ (3)14 mi
42Complete Home Services814.8★ (20)24 mi
43Mad Moose Mechanical815.0★ (14)24 mi
44Kingdom Cooling814.5★ (15)22 mi
45Minotaur Heating and Cooling HVAC Systems815.0★ (5)13 mi
46Freeman Mechanical805.0★ (8)16 mi
47Haverhill HVAC805.0★ (16)21 mi
48Fabrizio John Plumbing and Heating804.5★ (8)In Newmarket
49Cold Creek HVAC805.0★ (5)20 mi
50Thin Blue Line Plumbing and Heating, L.L.C.805.0★ (36)18 mi

How we ranked emergency HVAC contractors in Newmarket

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed from
Reputation25%Bayesian-adjusted Google star rating
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2
Review volume10%log10(reviews + 1) against the list maximum
Recency10%Share of reviews from the last 12 months
Availability20%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radius
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)

Emergency HVAC contractors in Newmarket: questions

Which HVAC contractors in Newmarket are open 24/7?

25 on this list post 24/7 hours, including Heritage Home Service, Key Heating & Air Conditioning, Heritage Home Service, HeatPro HVAC and East Coast Gas Fitters, LLC.

Who is ranked #1 for emergency heating and cooling in Newmarket, NH?

Heritage Home Service is #1, with a CR Score of 93 out of 100 on emergency weights.

How are emergency HVAC contractors in Newmarket ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the HVAC contractor arrives?

If you smell gas, leave the building now and call your gas utility or 911 from outside.

How many emergency HVAC contractors here list a phone number?

25 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Newmarket

  1. October 2026: CR Scores recalculated for 275 hvac contractors serving Newmarket.
  2. October 2026: 3 duplicate listings merged.

More emergency and heating and cooling pages