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Emergency HVAC Contractors in Windham, NH (2026)

Top 50 of 754 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 Windham: 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 Windham at a glance

Top emergency HVAC contractors in Windham at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Heritage Home Service934.8★ (7,956)Auburn, 11 mi away24/7
2MillTown Plumbing, Heating, Cooling and Electrical914.8★ (2,927)Chelmsford, 13 mi away24/7
3Walley's Heating & Air914.9★ (793)Nashua, 8 mi away24/7
4A. Fagundes Plumbing & Heating Inc.914.8★ (1,626)Billerica, 11 mi away24/7
5High Ground Service Pros - Plumbers Electricians & HVAC Technicians914.9★ (2,303)Manchester, 16 mi away24/7
6Heritage Home Service904.8★ (3,352)Wilmington, 16 mi away24/7
7Northeast Heating & Cooling905.0★ (449)Haverhill, 10 mi away24/7
8128 Plumbing, Heating, Cooling & Electric905.0★ (562)North Andover, 13 mi away24/7
9Central Cooling & Heating904.9★ (3,169)Woburn, 21 mi away24/7
10Wilson Brothers Heating & Air Conditioning, Inc.904.9★ (1,275)Fitchburg, 16 mi away24/7

Call an emergency HVAC contractor in Windham 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 Windham, 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 754 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.

Top 50 of 754 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 Windham, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Denommee Plumbing, HVAC & Electric884.7★ (427)12 mi
27Ferris Plumbing, Heating & Air884.9★ (320)15 mi
28Bill Trombly Plumbing - Heating - Cooling - Electric884.7★ (598)14 mi
29Morris Plumbing, Heating & Air Conditioning885.0★ (582)21 mi
30Excel Mechanical884.8★ (444)16 mi
31YurTek - Heating and Cooling885.0★ (86)10 mi
32Ferris Plumbing, Heating & Air874.9★ (77)8 mi
33Addario's Plumbing, Heating, Cooling & Electrical Services874.6★ (2,076)20 mi
34Brookside Heating & Cooling (fka Brookside Mechanical, Inc.)874.9★ (167)13 mi
35American Air HVAC874.8★ (223)13 mi
36Druziako HVAC Inc.874.8★ (185)12 mi
37Absolute Precision Plumbing, Heating & Cooling874.9★ (491)21 mi
38R.H. Young Cooling and Heating, Inc.874.8★ (265)15 mi
39Hunter & Sons AC & Cooling874.9★ (94)12 mi
40Cooling Unlimited, Inc.874.8★ (741)22 mi
41Key Heating & Air Conditioning874.8★ (692)21 mi
42HomeServe of New England864.7★ (872)22 mi
43NextGen Aire864.8★ (271)18 mi
44Modern Temperature Control864.9★ (96)15 mi
45Pilot Plumbing, Heating and Cooling | Plumber, Tankless Water Heater Repair & Installation | Heating & AC Repair Sandown, NH865.0★ (51)13 mi
46Hunter & Sons AC Heating & Cooling864.8★ (71)12 mi
47LHR Plumbing, Heating & AC Repair864.9★ (128)17 mi
48Home Service Doctors Plumbing & HVAC864.7★ (56)10 mi
49Traditional Oil Heating Services865.0★ (33)11 mi
50Danerik Mechanical, LLC.865.0★ (45)13 mi

How we ranked emergency HVAC contractors in Windham

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 Windham: questions

Which HVAC contractors in Windham are open 24/7?

25 on this list post 24/7 hours, including Heritage Home Service, MillTown Plumbing, Heating, Cooling and Electrical, Walley's Heating & Air, A. Fagundes Plumbing & Heating Inc. and High Ground Service Pros - Plumbers Electricians & HVAC Technicians.

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

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

How are emergency HVAC contractors in Windham 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 Windham

  1. October 2026: CR Scores recalculated for 754 hvac contractors serving Windham.
  2. October 2026: 9 duplicate listings merged.

More emergency and heating and cooling pages