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Emergency HVAC Contractors in Welland, ON (2026)

Top 50 of 224 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 Welland: Reliance Heating, Air Conditioning & Plumbing, 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 Welland at a glance

Top emergency HVAC contractors in Welland at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Reliance Heating, Air Conditioning & Plumbing634.8★ (2,986)St. Catharines, 21 km away24/7
2Mr. Furnace Heating and Air Conditioning634.8★ (2,672)St. Catharines, 21 km away24/7
3Enercare624.6★ (2,788)St. Catharines, 21 km away24/7
4Reimer Heating, Cooling & Plumbing624.9★ (8,360)Cheektowaga, 39 km away24/7
5Roy's Plumbing, Heating, Cooling & Electrical624.8★ (3,074)Tonawanda, 28 km away24/7
6Zenner & Ritter Home Services624.9★ (5,592)Buffalo, 36 km away24/7
7T-Mark Plumbing, Heating & Cooling- Buffalo624.9★ (3,978)Buffalo, 33 km away24/7
8Evans Heating & Cooling624.8★ (822)Niagara Falls, 20 km away24/7
9MacKay Heating & Cooling614.8★ (349)St. Catharines, 16 km away24/7
10Just Right Heating & Cooling615.0★ (384)Grand Island, 23 km away24/7

Call an emergency HVAC contractor in Welland 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 Welland, 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 224 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.

  3. #3 Enercare

    Based in St. Catharines, 21 km away

    62/100CR Score

    Ranked #3 because of its Google rating and trade focus: 4.6★ from 2,788 Google reviews, listed on Google as “HVAC contractor”.

    • 4.6★ from 2,788 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    30 Hannover Dr, St. Catharines, ON L2W 1A3
    View profile for Enercare(905) 225-1107

  17. #17 Niagara Home Heating

    Based in Niagara Falls, 16 km away

    60/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.8★ from 123 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 123 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4436 Shuttleworth Dr, Niagara Falls, ON L2G 0X5
    View profile for Niagara Home Heating(289) 228-2688

  19. #19 GORDON HOME SERVICES

    Based in Port Colborne, 9 km away

    59/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.8★ from 34 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 34 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    201 Omer Ave, Port Colborne, ON L3K 3Y7
    View profile for GORDON HOME SERVICES(289) 783-9553

Top 50 of 224 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 Welland, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Hvac Twenty One INC.595.0★ (7)In Welland
27James Pare Heating584.8★ (6)In Welland
28O'Donnell Heating & Air Conditioning Inc - Buffalo584.7★ (430)35 km
29Superior Plumbing & Heating of St. Catharines584.9★ (60)22 km
30Evolution Heating & Air Conditioning585.0★ (103)30 km
31Air In Motion HVAC Systems584.2★ (5)In Welland
32Holley Home Comfort585.0★ (53)24 km
33Superior Plumbing & Heating of Welland584.7★ (87)In Welland
34HOT WATER GUY584.0★ (4)In Welland
35Erie Niagara Heating and Cooling575.0★ (38)23 km
36Ideal Plumbing & Heating574.3★ (39)16 km
37Lane Refrigeration • Niagara Region575.0★ (11)12 km
38TP Gas Heating And Service575.0★ (28)21 km
39Superior Plumbing & Heating of Port Colborne575.0★ (8)11 km
40Sure-Fix Service Group Inc.573.7★ (53)13 km
41Delta P Plumbing Heating and Air Conditioning Inc574.9★ (108)34 km
42The Enviro-Niagara Group574.3★ (96)24 km
43H.W. Bryk and Sons574.3★ (75)24 km
44The Cool Factory Heating & Cooling575.0★ (91)37 km
45R. J. Dippold HomeWorks INC Heating and Air574.9★ (63)32 km
46Carlton 5 Mechanical Services564.1★ (13)15 km
47Cellino Plumbing, Heating, Cooling & Electric564.9★ (1,036)35 km
48Military Mechanical, Plumbing - Heating - Cooling564.9★ (50)31 km
49Repairus Commercial Refrigeration Services Niagara Inc564.6★ (20)22 km
50Superior Plumbing & Heating of Fort Erie564.6★ (43)28 km

How we ranked emergency HVAC contractors in Welland

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 Welland: questions

Which HVAC contractors in Welland are open 24/7?

25 on this list post 24/7 hours, including Reliance Heating, Air Conditioning & Plumbing, Mr. Furnace Heating and Air Conditioning, Enercare, Reimer Heating, Cooling & Plumbing and Roy's Plumbing, Heating, Cooling & Electrical.

Who is ranked #1 for emergency heating and cooling in Welland, ON?

Reliance Heating, Air Conditioning & Plumbing is #1, with a CR Score of 63 out of 100 on emergency weights.

How are emergency HVAC contractors in Welland 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 Welland

  1. October 2026: CR Scores recalculated for 224 hvac contractors serving Welland.

More emergency and heating and cooling pages