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Emergency HVAC Contractors in Derry, NH (2026)

Top 50 of 603 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 Derry: 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 Derry at a glance

Top emergency HVAC contractors in Derry at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Heritage Home Service674.8★ (7,956)Auburn, 6 mi away24/7
2High Ground Service Pros - Plumbers Electricians & HVAC Technicians644.9★ (2,303)Manchester, 11 mi away24/7
3Southern New Hampshire Plumbing and Heating644.8★ (433)Londonderry, 2 mi away24/7
4Derry Plumbing & Heating634.8★ (176)Derry24/7
5Walley's Heating & Air624.9★ (793)Nashua, 11 mi away24/7
6A.J. LeBlanc Heating, A/C, Plumbing & Electrical624.8★ (683)Bedford, 10 mi away24/7
7MillTown Plumbing, Heating, Cooling and Electrical624.8★ (2,927)Chelmsford, 18 mi away24/7
8Patriot Oil Burner Service625.0★ (263)Chester, 7 mi away24/7
9LHR Plumbing Heating Cooling and Electric624.9★ (454)Manchester, 9 mi away24/7
10A. Fagundes Plumbing & Heating Inc.624.8★ (1,626)Billerica, 15 mi away24/7

Call an emergency HVAC contractor in Derry 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 Derry, 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 603 is on the HVAC contractors page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  13. #13 Heritage Home Service

    Based in Wilmington, 22 mi away

    61/100CR Score

    Ranked #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
    View profile for Heritage Home Service(978) 254-4602

  17. #17 Fuel NRG

    Based in Derry

    61/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.5★ from 94 Google reviews, listed on Google as “Heating contractor”.

    • 4.5★ from 94 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Fuel NRG(603) 890-7051

  21. #21 MVP Home Services

    Based in Haverhill, 15 mi away

    60/100CR Score

    Ranked #21 because of its Google rating and trade focus: 4.7★ from 545 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 545 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    72 S Kimball St, Haverhill, MA 01835
    View profile for MVP Home Services(978) 228-1904

Top 50 of 603 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 Derry, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Key Heating & Air Conditioning604.8★ (692)20 mi
27Triumph Home Services604.9★ (539)20 mi
28Denommee Plumbing, HVAC & Electric604.7★ (427)16 mi
29LHR Plumbing, Heating & AC Repair604.9★ (128)12 mi
30Patriot Heating & Cooling, LLC604.8★ (174)13 mi
31Danerik Mechanical, LLC.595.0★ (45)8 mi
32Clear All Cooling & Heating595.0★ (54)9 mi
33Kingdom Cooling594.5★ (15)In Derry
34J. Griffin Heating & Plumbing Inc595.0★ (643)24 mi
35City Fuel594.6★ (101)9 mi
36Cool-Rite Mechanical Inc.594.9★ (183)17 mi
37Done right plumbing heating cooling595.0★ (46)9 mi
38Ferris Plumbing, Heating & Air594.9★ (77)12 mi
39Georges Heating and Cooling594.3★ (82)6 mi
40Pilot Plumbing, Heating and Cooling | Plumber, Tankless Water Heater Repair & Installation | Heating & AC Repair Sandown, NH595.0★ (51)10 mi
41Morris Plumbing, Heating & Air Conditioning595.0★ (582)25 mi
42Haverhill HVAC595.0★ (16)4 mi
43Excel Mechanical594.8★ (444)22 mi
44NextGen Aire594.8★ (271)19 mi
45Druziako HVAC Inc.584.8★ (185)18 mi
46American Air HVAC584.8★ (223)19 mi
47YurTek - Heating and Cooling585.0★ (86)16 mi
48Audette Mechanical585.0★ (5)In Derry
49Modern Temperature Control584.9★ (96)16 mi
50R.H. Young Cooling and Heating, Inc.584.8★ (265)21 mi

How we ranked emergency HVAC contractors in Derry

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. 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
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency HVAC contractors in Derry: questions

Which HVAC contractors in Derry are open 24/7?

25 on this list post 24/7 hours, including Heritage Home Service, High Ground Service Pros - Plumbers Electricians & HVAC Technicians, Southern New Hampshire Plumbing and Heating, Derry Plumbing & Heating and Walley's Heating & Air.

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

Heritage Home Service is #1, with a CR Score of 67 out of 100 on emergency weights.

How are emergency HVAC contractors in Derry ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. 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 Derry

  1. October 2026: CR Scores recalculated for 603 hvac contractors serving Derry.
  2. October 2026: 9 duplicate listings merged.

More emergency and heating and cooling pages