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Emergency HVAC Contractors in Williston, VT (2026)

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

7 of the 46 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 Williston: Call The Whale (Plumbing Heating Air Electrical), 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 Williston at a glance

Top emergency HVAC contractors in Williston at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Call The Whale (Plumbing Heating Air Electrical)674.7★ (372)Williston24/7
2Falcon Plumbing Service Inc614.2★ (63)Burlington, 5 mi away24/7
3Greg's Gas Heating & Home Inspections LLC595.0★ (13)Essex Junction, 5 mi away24/7
4Red Rock Mechanical, LLC593.9★ (81)Colchester, 13 mi away24/7
5O'Neal Mechanical LLC594.6★ (7)Burlington, 1 mi away24/7
6Vapor Stone Rail Systems554.2★ (25)Plattsburgh, 24 mi away24/7
7Peak Mechanical543.8★ (6)Colchester, 18 mi away24/7
8Green Heat485.0★ (476)Burlington, 7 mi away—
9Ciarletta Services474.4★ (9)Burlington, 8 mi away—
10J R's Plumbing & Heating473.4★ (5)Essex Junction, 4 mi away—

Call an emergency HVAC contractor in Williston 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 46 emergency HVAC contractors in Williston, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights.

  4. #4 Red Rock Mechanical, LLC

    Based in Colchester, 13 mi away

    59/100CR Score

    Ranked #4 because of its Google rating and trade focus: 3.9★ from 81 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.9★ from 81 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    339 Red Rock Rd, Colchester, VT 05446
    View profile for Red Rock Mechanical, LLC(802) 893-9992

  5. #5 O'Neal Mechanical LLC

    Based in Burlington, 1 mi away

    59/100CR Score

    Ranked #5 because of its Google rating and trade focus: 4.6★ from 7 Google reviews, listed on Google as “Heating contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.6★ from 7 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for O'Neal Mechanical LLC(802) 598-8629

  6. #6 Vapor Stone Rail Systems

    Based in Plattsburgh, 24 mi away

    55/100CR Score

    Ranked #6 because of its Google rating and trade focus: 4.2★ from 25 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.2★ from 25 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    72 Arizona Ave, Plattsburgh, NY 12903
    View profile for Vapor Stone Rail Systems(518) 561-0044

  7. #7 Peak Mechanical

    Based in Colchester, 18 mi away

    54/100CR Score

    Ranked #7 because of its Google rating and trade focus: 3.8★ from 6 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.8★ from 6 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    80 Commercial Dr, Waterbury, VT 05676
    View profile for Peak Mechanical(888) 771-8881

  8. #8 Green Heat

    Based in Burlington, 7 mi away

    48/100CR Score

    Ranked #8 because of its Google rating and review volume: 5.0★ from 476 Google reviews.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 476 Google reviews
    Hours
    Mon–Thu 8 AM–4 PM · Fri–Sun closed
    Address
    38 Pinehurst Dr, Jericho, VT 05465
    View profile for Green Heat(802) 858-9740

  9. #9 Ciarletta Services

    Based in Burlington, 8 mi away

    47/100CR Score

    Ranked #9 because of its Google rating and trade focus: 4.4★ from 9 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 4.4★ from 9 Google reviews
    Address
    16 Johnson St Suite 33, Burlington, VT 05401
    View profile for Ciarletta Services

  10. #10 J R's Plumbing & Heating

    Based in Essex Junction, 4 mi away

    47/100CR Score

    Ranked #10 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “Heating contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 3.4★ from 5 Google reviews
    Address
    28 Maple St, Essex Junction, VT 05452
    View profile for J R's Plumbing & Heating(802) 324-3322

  11. #11 Vermont Energy Contracting

    Based in Williston

    46/100CR Score

    Ranked #11 because of its Google rating and trade focus: 4.6★ from 115 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.6★ from 115 Google reviews
    Hours
    Mon–Fri 8 AM–4 PM · Sat–Sun closed
    Address
    188 Krupp Dr, Williston, VT 05495
    View profile for Vermont Energy Contracting(802) 658-6055

  13. #13 A Cooper Mechanical, Inc.

    Based in Williston

    44/100CR Score

    Ranked #13 because of its Google rating and trade focus: 5.0★ from 38 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 38 Google reviews
    Hours
    Mon–Fri 7 AM–3:30 PM · Sat–Sun closed
    Address
    171 Leroy Rd, Williston, VT 05495
    View profile for A Cooper Mechanical, Inc.(802) 655-9191

  15. #15 Climate Systems

    Based in Williston

    42/100CR Score

    Ranked #15 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 15 Google reviews
    Hours
    Mon–Fri 7 AM–4 PM · Sat–Sun closed
    Address
    177 Avenue C #110, Williston, VT 05495
    View profile for Climate Systems(802) 660-9969

  17. #17 Air Systems Inc

    Based in South Burlington, 4 mi away

    42/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.7★ from 24 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.7★ from 24 Google reviews
    Hours
    Mon–Fri 7:30 AM–8 PM · Sat–Sun 9 AM–7 PM
    Address
    1 Green Tree Dr, South Burlington, VT 05403
    View profile for Air Systems Inc

  18. #18 Energy Co-op of Vermont

    Based in Colchester, 11 mi away

    41/100CR Score

    Ranked #18 because of its Google rating and trade focus: 4.4★ from 65 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.4★ from 65 Google reviews
    Hours
    Mon–Fri 8 AM–4 PM · Sat–Sun closed
    Address
    73 Prim Rd, Colchester, VT 05446
    View profile for Energy Co-op of Vermont(802) 860-4090

  20. #20 Jay Mechanical

    Based in Essex Junction, 6 mi away

    41/100CR Score

    Ranked #20 because of its Google rating and trade focus: 4.1★ from 40 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.1★ from 40 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    24 New England Dr Suite 30, Essex Junction, VT 05452
    View profile for Jay Mechanical(802) 327-7939

  21. #21 E & M Mechanical Inc

    Based in South Burlington, 5 mi away

    41/100CR Score

    Ranked #21 because of its Google rating and trade focus: 4.4★ from 26 Google reviews, listed on Google as “Heating contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.4★ from 26 Google reviews
    Hours
    Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
    Address
    41 Commerce Ave, South Burlington, VT 05403
    View profile for E & M Mechanical Inc(802) 658-1222

  23. #23 Long Trail Mechanical

    Based in Williston

    40/100CR Score

    Ranked #23 because of its Google rating and trade focus: 3.1★ from 9 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.1★ from 9 Google reviews
    Hours
    Mon–Sun 7 AM–5 PM
    Address
    2073 N Rd, Hinesburg, VT 05461
    View profile for Long Trail Mechanical(802) 528-6131

  24. #24 Chuck's Heating & A/C, Inc

    Based in Colchester, 7 mi away

    40/100CR Score

    Ranked #24 because of its Google rating and trade focus: 3.2★ from 77 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.2★ from 77 Google reviews
    Hours
    Mon–Fri 7 AM–5 PM · Sat–Sun closed
    Address
    416 Roosevelt Hwy, Colchester, VT 05446
    View profile for Chuck's Heating & A/C, Inc(802) 655-1489

  25. #25 Vermont Mechanical

    Based in Williston

    39/100CR Score

    Ranked #25 because of its Google rating and trade focus: 3.7★ from 6 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.7★ from 6 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    211 Blair Park Rd, Williston, VT 05495
    View profile for Vermont Mechanical(802) 862-5900

All 46 HVAC contractors by emergency score

#1 to #25 are shown in full above. Here are #26 to #46, in CR Score order; each links to its profile.

HVAC contractors in Williston, ranks 26 to 46
RankBusinessCR ScoreGoogle ratingDistance
26VHV Company - Full Service HVAC/R & Plumbing Construction and Service Repair394.2★ (15)8 mi
27all seasons mechanical394.8★ (5)1 mi
28Maheux Heating & Refrigeration395.0★ (9)6 mi
29Control Technologies Inc.393.8★ (5)In Williston
30New England Air Systems LLC395.0★ (4)In Williston
31Yankee Plumbing & Heating Inc393.4★ (16)7 mi
32Williamson Plumbing & Heating, Inc.395.0★ (3)In Williston
33Homans Associates394.0★ (3)In Williston
34Fischer's Heating & Gas383.6★ (7)5 mi
35Shae Plumbing & Heating384.9★ (30)7 mi
36Burlington Heating & Air Conditioning384.6★ (5)7 mi
37Northeast Air Solutions Inc.384.8★ (4)6 mi
38Champ Mechanical373.6★ (5)7 mi
39Bourne's Energy373.5★ (11)13 mi
40Jack's HVAC374.4★ (7)13 mi
41Mitchell Sheet Metal Inc375.0★ (3)8 mi
42B.C. Carrier Plumbing & Heating365.0★ (4)11 mi
43Kirk Mechanical365.0★ (7)17 mi
44Bourne's Energy363.8★ (37)25 mi
45Pinnacle Air Systems LLC355.0★ (3)15 mi
46Helios HVAC335.0★ (5)25 mi

How we ranked emergency HVAC contractors in Williston

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 Williston: questions

Which HVAC contractors in Williston are open 24/7?

7 on this list post 24/7 hours, including Call The Whale (Plumbing Heating Air Electrical), Falcon Plumbing Service Inc, Greg's Gas Heating & Home Inspections LLC, Red Rock Mechanical, LLC and O'Neal Mechanical LLC.

Who is ranked #1 for emergency heating and cooling in Williston, VT?

Call The Whale (Plumbing Heating Air Electrical) is #1, with a CR Score of 67 out of 100 on emergency weights.

How are emergency HVAC contractors in Williston 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?

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

Update log for Williston

  1. October 2026: CR Scores recalculated for 46 hvac contractors serving Williston.

More emergency and heating and cooling pages