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Emergency HVAC Contractors in Guelph, ON (2026)

Top 50 of 291 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 Guelph: Oosterveld Heating & Air Conditioning, 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 Guelph at a glance

Top emergency HVAC contractors in Guelph at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Oosterveld Heating & Air Conditioning664.8★ (1,575)Guelph24/7
2Reliance Heating, Air Conditioning & Plumbing654.7★ (9,230)Cambridge, 15 km away24/7
3Aire One Heating & Cooling KW654.8★ (9,448)Kitchener, 19 km away24/7
4Aido Climate Solutions Inc.644.9★ (529)Guelph24/7
5Aire One Heating & Cooling Cambridge644.9★ (2,155)Cambridge, 15 km away24/7
6Hy-Mark Home Comfort644.8★ (450)Guelph24/7
7Able Air Conditioning & Heating635.0★ (1,247)Kitchener, 17 km away24/7
8Boehmers/Cronin Emery Home Services by Enercare634.8★ (1,534)Cambridge, 17 km away24/7
9Local Own Comfort635.0★ (113)Guelph24/7
10Guelph ClimateCare624.7★ (164)Guelph24/7

Call an emergency HVAC contractor in Guelph 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 Guelph, 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 291 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.

  9. #9 Local Own Comfort

    Based in Guelph

    63/100CR Score

    Ranked #9 because of its Google rating and trade focus: 5.0★ from 113 Google reviews, listed on Google as “Heating contractor”.

    • 5.0★ from 113 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3 Watson Rd S Unit 4, Guelph, ON N1E 6Y9
    View profile for Local Own Comfort(519) 500-5353

  10. #10 Guelph ClimateCare

    Based in Guelph

    62/100CR Score

    Ranked #10 because of its Google rating and trade focus: 4.7★ from 164 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 164 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3, 5551 Hwy 6 N, Guelph, ON N1H 6J2
    View profile for Guelph ClimateCare(519) 829-3666

  12. #12 Total Aire Care Inc.

    Based in Kitchener, 22 km away

    62/100CR Score

    Ranked #12 because of its Google rating and trade focus: 5.0★ from 857 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 857 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    299 Manitou Dr A, Kitchener, ON N2C 1L5
    View profile for Total Aire Care Inc.(226) 894-1000

  17. #17 LG Home Comfort KWC

    Based in Kitchener, 22 km away

    61/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.9★ from 674 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 674 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    20 Hanson Ave, Kitchener, ON N2C 2E2
    View profile for LG Home Comfort KWC(226) 289-1301

Top 50 of 291 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 Guelph, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Local Heating And Cooling615.0★ (397)24 km
27City Heating and Cooling604.8★ (273)21 km
28Priority Heating, Cooling & Plumbing604.9★ (593)31 km
29Total Home Energy Systems604.9★ (268)24 km
30Brooks Heating & Air604.9★ (537)31 km
31Unique Air604.9★ (187)22 km
32Air and Water Care595.0★ (203)26 km
33The HVAC Service595.0★ (14)In Guelph
34Valley Mechanical595.0★ (54)13 km
35Jambreeze Heating And Cooling595.0★ (115)21 km
36Tri City Heating and Cooling Inc594.9★ (109)20 km
37Flashe Gas595.0★ (567)38 km
38Regional Air | Furnace Repair - Service - Installation594.9★ (132)23 km
39Frozen Flame Canada595.0★ (8)In Guelph
40Air Expert Home Comfort Inc584.6★ (155)22 km
41Medeiros Mechanical Services585.0★ (30)14 km
42Arthur's Heating & Cooling584.9★ (120)26 km
43Adaptive Mechanical Inc584.8★ (89)22 km
44All Year Heating and Cooling Inc.585.0★ (59)23 km
45ELEVATE AIR585.0★ (48)21 km
46AirTemp HVAC Furnace and Air Conditioner of Burlington585.0★ (285)38 km
47Platinum Home Comfort585.0★ (36)19 km
48AirCon Inc.584.7★ (27)14 km
49Constant Home Comfort Waterloo584.7★ (81)23 km
50Air Pro Services584.8★ (29)17 km

How we ranked emergency HVAC contractors in Guelph

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 Guelph: questions

Which HVAC contractors in Guelph are open 24/7?

25 on this list post 24/7 hours, including Oosterveld Heating & Air Conditioning, Reliance Heating, Air Conditioning & Plumbing, Aire One Heating & Cooling KW, Aido Climate Solutions Inc. and Aire One Heating & Cooling Cambridge.

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

Oosterveld Heating & Air Conditioning is #1, with a CR Score of 66 out of 100 on emergency weights.

How are emergency HVAC contractors in Guelph 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 Guelph

  1. October 2026: CR Scores recalculated for 291 hvac contractors serving Guelph.
  2. October 2026: 1 duplicate listing merged.

More emergency and heating and cooling pages