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Emergency HVAC Contractors in Norwich, CT (2026)

Top 50 of 158 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

24 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 Norwich: Kneeland heating & Cooling LLC, 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 Norwich at a glance

Top emergency HVAC contractors in Norwich at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Kneeland heating & Cooling LLC614.6★ (169)Groton, 7 mi away24/7
2HVAC Restorations LLC.615.0★ (33)Norwich24/7
3DTS Oil & Gas Service & Solutions LLC615.0★ (150)Hebron, 13 mi away24/7
4CNM Heating Cooling Piping LLC605.0★ (186)Storrs, 19 mi away24/7
5C&M Heating and Cooling, LLC594.6★ (28)Ledyard, 4 mi away24/7
6Connecticut HVAC Services llc594.6★ (107)Guilford, 13 mi away24/7
7Corbett HVAC Services LLC584.4★ (80)Willimantic, 15 mi away24/7
8Carnot Heating574.6★ (9)Groton, 6 mi away24/7
9Russ Energy575.0★ (8)East Haddam, 6 mi away24/7
10Sprague Heating & Cooling LLC575.0★ (8)Windham, 6 mi away24/7

Call an emergency HVAC contractor in Norwich 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 Norwich, 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 158 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.

  8. #8 Carnot Heating

    Based in Groton, 6 mi away

    57/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “HVAC contractor”.

    • 4.6★ from 9 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Carnot Heating(860) 917-5879

  9. #9 Russ Energy

    Based in East Haddam, 6 mi away

    57/100CR Score

    Ranked #9 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 8 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Russ Energy(860) 800-4737

  12. #12 Air Pro Services LLC

    Based in Plainfield, 10 mi away

    56/100CR Score

    Ranked #12 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “HVAC contractor”.

    • 4.6★ from 9 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    54 Woodchuck Hill Rd, Canterbury, CT 06331
    View profile for Air Pro Services LLC(860) 334-3031

  13. #13 Air Guarden

    Based in Norwich

    56/100CR Score

    Ranked #13 because of its Google rating and review volume: 5.0★ from 59 Google reviews.

    • 5.0★ from 59 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1 Hilltop Rd, Norwich, CT 06360
    View profile for Air Guarden(860) 222-1605

  15. #15 Best Energy

    Based in Pawcatuck, 16 mi away

    55/100CR Score

    Ranked #15 because of its Google rating and trade focus: 3.8★ from 32 Google reviews, listed on Google as “HVAC contractor”.

    • 3.8★ from 32 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4 Mechanic St, Pawcatuck, CT 06379
    View profile for Best Energy(860) 599-1920

  24. #24 KSB Electric

    Based in Glastonbury Center, 25 mi away

    53/100CR Score

    Ranked #24 because of its Google rating and review volume: 5.0★ from 245 Google reviews.

    • 5.0★ from 245 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    59 Loomis Rd, Bolton, CT 06043
    View profile for KSB Electric(860) 854-3772

Top 50 of 158 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 Norwich, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Rapid Service LLC504.4★ (74)19 mi
27BTW Plumbing, Heating, and Cooling LLC495.0★ (8)In Norwich
2872 Degrees Air Conditioning & Heating474.2★ (16)7 mi
29MDK Mechancial LLC475.0★ (3)In Norwich
30MIDKNIGHT OIL COMPANY464.6★ (9)9 mi
31TNT Heating & Cooling LLC465.0★ (9)11 mi
32Muscarella Plumbing & Heating Inc454.0★ (4)10 mi
33Rich's Heating454.2★ (5)11 mi
34Broad Brook Heating & Cooling Inc444.9★ (175)4 mi
35W F Lebeau Plumbing & Heating444.6★ (7)15 mi
36South Shore Heating & Cooling Inc434.9★ (564)15 mi
37Eastern Connecticut Heating434.5★ (26)24 mi
38Eric Sabo Plumbing Heating & Cooling, LLC.434.9★ (264)10 mi
39DDLC Energy434.7★ (422)12 mi
40Villa & Sons434.0★ (4)15 mi
41Control/Temp433.3★ (4)15 mi
42Densmore Oil Company434.9★ (283)14 mi
43E W Leonard Inc434.7★ (6)19 mi
44Northeast Temperature Control425.0★ (3)17 mi
45Duncklee Cooling & Heating Inc424.7★ (256)13 mi
46Norwich Discount Oil424.1★ (60)In Norwich
47Brunelli Energy424.6★ (30)In Norwich
48Carboni Plumbing & Heating414.4★ (28)In Norwich
49Service Solutions LLC414.4★ (25)In Norwich
50Heating and Cooling Solutions, LLC414.2★ (26)In Norwich

How we ranked emergency HVAC contractors in Norwich

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 Norwich: questions

Which HVAC contractors in Norwich are open 24/7?

24 on this list post 24/7 hours, including Kneeland heating & Cooling LLC, HVAC Restorations LLC., DTS Oil & Gas Service & Solutions LLC, CNM Heating Cooling Piping LLC and C&M Heating and Cooling, LLC.

Who is ranked #1 for emergency heating and cooling in Norwich, CT?

Kneeland heating & Cooling LLC is #1, with a CR Score of 61 out of 100 on emergency weights.

How are emergency HVAC contractors in Norwich 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 Norwich

  1. October 2026: CR Scores recalculated for 158 hvac contractors serving Norwich.
  2. October 2026: 3 duplicate listings merged.

More emergency and heating and cooling pages