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ContractorsRanked

Best HVAC Contractors in New London, CT (2026)

131 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in New London: Kneeland heating & Cooling LLC, CR Score 63/100; 4.6★ from 169 Google reviews; open 24/7.

  2. 3

    Best for emergencies (open 24/7): Connecticut HVAC Services llc, posts 24/7 hours; ranked #3 of 131.

  3. 5

    Most-reviewed: South Shore Heating & Cooling Inc, 564 Google reviews at 4.9★, the most of 131 ranked; ranked #5.

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

131 New London HVAC contractors are ranked here by CR Score, from ten published factors. 21 are open 24/7, 37 open Saturdays and 29 open Sundays, based on posted hours. The median Google rating is 4.6★ across 131 rated businesses.

Top 10 HVAC contractors in New London at a glance

Top 10 HVAC contractors in New London at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Kneeland heating & Cooling LLC634.6★ (169)Groton, 5 mi away24/7Overall
2DDLC Energy614.7★ (422)New London——
3Connecticut HVAC Services llc614.6★ (107)Guilford, 8 mi away24/7Emergencies
4DTS Oil & Gas Service & Solutions LLC615.0★ (150)Hebron, 21 mi away24/7—
5South Shore Heating & Cooling Inc604.9★ (564)Pawcatuck, 12 mi away—Most reviews
6Densmore Oil Company594.9★ (283)Groton, 8 mi away——
7HVAC Restorations LLC.595.0★ (33)Norwich, 13 mi away24/7—
8Scotti Mechanical Heating and Cooling594.6★ (35)Waterford, 3 mi awaySat · Sun—
9Irie Energy Heating & Cooling, LLC595.0★ (67)New London——
10Broad Brook Heating & Cooling Inc584.9★ (175)Ledyard, 8 mi away——

The 131 best HVAC contractors in New London, 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.

  2. #2 DDLC Energy

    Based in New London

    61/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.7★ from 422 Google reviews, listed on Google as “Air conditioning contractor”.

    • 4.7★ from 422 Google reviews
    Hours
    Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
    Address
    410 Bank St, New London, CT 06320
    View profile for DDLC Energy(866) 395-7220

  6. #6 Densmore Oil Company

    Based in Groton, 8 mi away

    59/100CR Score

    Ranked #6 because of its Google rating and trade focus: 4.9★ from 283 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 283 Google reviews
    Hours
    Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
    Address
    26 Old Stonington Rd, Stonington, CT 06378
    View profile for Densmore Oil Company(860) 536-7927

  12. #12 Wilcox Energy

    Based in Guilford, 19 mi away

    58/100CR Score

    Ranked #12 because of its Google rating and trade focus: 5.0★ from 467 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 467 Google reviews
    Hours
    Mon–Fri 7:30 AM–4 PM · Sat–Sun closed
    Address
    1179 Boston Post Rd, Westbrook, CT 06498
    View profile for Wilcox Energy(860) 399-6218

  13. #13 Benvenuti Oil Co Inc

    Based in Waterford, 1 mi away

    58/100CR Score

    Ranked #13 because of its Google rating and trade focus: 4.6★ from 118 Google reviews, listed on Google as “HVAC contractor”.

    • 4.6★ from 118 Google reviews
    Hours
    Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
    Address
    17 Boston Post Rd # R, Waterford, CT 06385
    View profile for Benvenuti Oil Co Inc(860) 443-6115

  15. #15 Russ Energy

    Based in East Haddam, 6 mi away

    57/100CR Score

    Ranked #15 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

  18. #18 Carnot Heating

    Based in Groton, 10 mi away

    56/100CR Score

    Ranked #18 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

  22. #22 Best Energy

    Based in Pawcatuck, 14 mi away

    56/100CR Score

    Ranked #22 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

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 131 ranked HVAC contractors here; the rest are on their profiles.

HVAC contractors in New London, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26CMC Sheet Metal LLC555.0★ (12)13 mi
27D&V Mechanical INC555.0★ (44)17 mi
28Rich's Heating554.2★ (5)In New London
29Benedetto Heating & AC LLC554.9★ (74)16 mi
30Controlled Mechanicals545.0★ (8)19 mi
31Redstar Plumbing & Heating545.0★ (10)In New London
32Lamphere Plumbing & Heating543.0★ (8)6 mi
33MIDKNIGHT OIL COMPANY544.6★ (9)7 mi
34Service Solutions LLC544.4★ (25)18 mi
35Brodeur's Oil Service, Inc.544.3★ (14)In New London
36Advanced Heating Oil543.8★ (46)1 mi
37Bartol Heating and Cooling544.2★ (15)In New London
38Valley Heating & Cooling Inc543.9★ (56)24 mi
39All-Star Plumbing, Heating & Cooling, Inc.545.0★ (64)19 mi
40Brunelli Energy544.6★ (30)15 mi
41Spicer Propane543.6★ (106)1 mi
42B & H Bugbee Plumbing & Heating544.8★ (21)8 mi
43Muscarella Plumbing & Heating Inc544.0★ (4)3 mi
44Air Guarden535.0★ (59)15 mi
45Air Pro Services LLC534.6★ (9)21 mi
46Uncasville Oil534.5★ (27)7 mi
47Marlborough Heating & AC534.2★ (5)18 mi
48Tomaszek & Sons Plumbing534.8★ (18)9 mi
49Cool Boats LLC534.4★ (20)7 mi
50SLS HEATING LLC- 24 HOUR EMERGENCY SERVICE533.4★ (62)6 mi

Also serving New London

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.

Unranked HVAC contractors serving New London
BusinessGoogle ratingDistance
Action Air Inc.3.8★ (16)24 mi
All Seasons Heating & Cooling5.0★ (2)23 mi
American Air Mechanical LLC3.9★ (17)24 mi
Brayman Heating & Cooling, Inc3.0★ (2)16 mi
Chimney Works4.0★ (2)8 mi
D J Mc Carthy Plumbing & Heating5.0★ (2)4 mi
Duncklee Cooling & Heating5.0★ (1)10 mi
E W Leonard Inc4.7★ (6)21 mi
Fitzpatrick Heating & Air Conditioning5.0★ (2)23 mi
Fresh Air Mechanical5.0★ (1)8 mi
Hank's Plumbing & Heating Services5.0★ (2)15 mi
JDS Unlimited1.0★ (1)1 mi
MDK Mechancial LLC5.0★ (3)18 mi
Mystic Plumbing & Heating5.0★ (2)5 mi
Norwich Plumbing & Heating5.0★ (1)14 mi
Rainville Plumbing & Heating5.0★ (4)15 mi
RC Mechanical5.0★ (1)11 mi
Suburban Plumbing & Heating4.0★ (4)In New London
TNT Heating & Cooling LLC5.0★ (9)18 mi
Walter Electric LLC4.9★ (329)In New London

How much do HVAC contractors cost in New London?

National price ranges in USD, not adjusted for New London. Each row names its basis and the month we checked it.

How much do HVAC contractors cost in New London?
JobLowTypicalHighBasisChecked
AC replacement$3,887$5,978$8,073Per system, installed (unit plus labor); typical range of customer-reported jobs. US national rangeOctober 2026
Furnace replacement$2,823$4,814$6,896Per system, installed; typical range of customer-reported jobs. US national rangeOctober 2026

How to check an HVAC contractor's license in Connecticut

In Connecticut, Connecticut Department of Consumer Protection licenses Heating, piping, cooling and sheet metal licenses.

  1. Search the business name or license number on the Connecticut Department of Consumer Protection license lookup.
  2. Check that the status is active and the name matches the contract or truck.
  3. Ask for proof of insurance before work starts.

No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.

Guide checked October 2026. How we verify licenses

When to hire an HVAC contractor in Connecticut

In Connecticut, 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 New London HVAC contractors

We scored 131 New London 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn New London data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Credentials15%Active state license, bond and workers’ comp on fileNot yet collected
Review volume10%Number of Google reviews, compared with the most-reviewed business on the listMeasured
Recency5%Share of reviews from the last 12 monthsNot yet collected
Availability5%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%How clearly the business does this trade (its Google category and name)Measured
Proximity5%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)Measured
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodicallyMeasured
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there areMeasured

HVAC contractors in New London: frequently asked questions

Who is the best HVAC contractor in New London?

By CR Score, the highest-ranked HVAC contractor in New London, CT is Kneeland heating & Cooling LLC with a CR Score of 63/100. It has 4.6★ from 169 Google reviews. It is open 24/7. DDLC Energy (#2) and Connecticut HVAC Services llc (#3) follow. We ranked 131 HVAC contractors on ten factors, last updated October 22, 2026.

How many HVAC contractors are there in New London?

ContractorsRanked ranks 131 HVAC contractors serving New London, CT. 7 of them are based in New London; 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 New London are open 24/7?

21 ranked HVAC contractors in New London post 24/7 hours. The highest-ranked are Kneeland heating & Cooling LLC (#1), Connecticut HVAC Services llc (#3) and DTS Oil & Gas Service & Solutions LLC (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in New London work on weekends?

37 of 131 ranked HVAC contractors post Saturday hours and 29 post Sunday hours. The highest-ranked open Saturdays are Kneeland heating & Cooling LLC (#1), Connecticut HVAC Services llc (#3) and DTS Oil & Gas Service & Solutions LLC (#4). Posted hours are office hours; crews may book weekend jobs separately.

How do I check an HVAC contractor's license in Connecticut?

In Connecticut, Connecticut Department of Consumer Protection handles licensing and covers Heating, piping, cooling and sheet metal licenses. Search the business or license number at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx.

How much does ac replacement cost in New London?

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 New London. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do New London HVAC contractors have?

The median Google rating among 131 rated HVAC contractors in New London is 4.6★, with a median of 17 reviews. South Shore Heating & Cooling Inc has the most, 564 reviews, and ranks #5. 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 New London?

In Connecticut, 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.

Update log for New London

  1. October 2026: CR Scores recalculated for 131 hvac contractors serving New London.
  2. October 2026: 3 duplicate listings merged.

More HVAC contractors and New London pages

Other trades in New London