Skip to content
ContractorsRanked

Emergency HVAC Contractors in Alliston, ON (2026)

Top 50 of 217 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 Alliston: Reliance Yanch 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 Alliston at a glance

Top emergency HVAC contractors in Alliston at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Reliance Yanch Heating, Air Conditioning & Plumbing924.8★ (5,937)Barrie, 26 km away24/7
2Affordable Comfort914.9★ (2,540)Barrie, 24 km away24/7
3Don's Heating and Cooling Ltd.904.8★ (139)Alliston24/7
4Enercare894.7★ (2,051)Barrie, 26 km away24/7
5Custom Comfort ClimateCare894.9★ (738)Barrie, 27 km away24/7
6Climate Air Heating & Air Conditioning894.8★ (841)Barrie, 25 km away24/7
7Don's Heating and Cooling Ltd.894.8★ (1,048)Orangeville, 29 km away24/7
8Summers and Smith Cooling & Heating Limited894.9★ (1,559)Aurora, 37 km away24/7
9Air Source Home Comfort884.9★ (554)Barrie, 28 km away24/7
10ClimateCo Mechanical885.0★ (24)Alliston24/7

Call an emergency HVAC contractor in Alliston 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 Alliston, 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 217 is on the HVAC contractors page.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  4. #4 Enercare

    Based in Barrie, 26 km away

    89/100CR Score

    Ranked #4 because of its Google rating and availability: 4.7★ from 2,051 Google reviews, open 24/7.

    • 4.7★ from 2,051 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    680 Huronia Rd, Barrie, ON L4N 6C6
    View profile for Enercare(705) 408-1098

  12. #12 Black Forest

    Based in East Gwillimbury, 31 km away

    87/100CR Score

    Ranked #12 because of its Google rating and availability: 4.8★ from 532 Google reviews, open 24/7.

    • 4.8★ from 532 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    16 Mt Albert Rd, East Gwillimbury, ON L9N 1K4
    View profile for Black Forest(905) 252-9994

  15. #15 Central Heating

    Based in Barrie, 26 km away

    87/100CR Score

    Ranked #15 because of its Google rating and availability: 4.8★ from 306 Google reviews, open 24/7.

    • 4.8★ from 306 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    647 Welham Rd Unit #2, Barrie, ON L4N 0B7
    View profile for Central Heating(705) 315-8822

  17. #17 CORH

    Based in Barrie, 23 km away

    87/100CR Score

    Ranked #17 because of its Google rating and availability: 4.9★ from 126 Google reviews, open 24/7.

    • 4.9★ from 126 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    322 King St Unit #3, Barrie, ON L4N 6L2
    View profile for CORH(705) 517-0174

  22. #22 Black Forest

    Based in Barrie, 30 km away

    86/100CR Score

    Ranked #22 because of its Google rating and availability: 4.9★ from 132 Google reviews, open 24/7.

    • 4.9★ from 132 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    49 High St 3rd floor, Barrie, ON L4N 5J4
    View profile for Black Forest(705) 707-1116

  23. #23 Smile HVAC

    Based in Barrie, 31 km away

    86/100CR Score

    Ranked #23 because of its Google rating and availability: 5.0★ from 113 Google reviews, open 24/7.

    • 5.0★ from 113 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    39 Maple Crown Terrace, Barrie, ON L4M 7H4
    View profile for Smile HVAC(437) 777-4555

Top 50 of 217 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 Alliston, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26LaFontaine Mechanical854.9★ (108)31 km
27Mcgillvrays HVAC855.0★ (10)In Alliston
28DC Comfort Air855.0★ (145)38 km
29JLN HVAC Solutions Inc.854.9★ (233)39 km
30Zeeco Services Ltd854.6★ (140)26 km
31North Wind HVAC854.8★ (128)32 km
32Eclipse Temperature Solutions855.0★ (7)In Alliston
33Superior Plumbing & Heating of Barrie854.7★ (68)25 km
34Simcoe Refrigeration and Air Ltd.854.9★ (25)20 km
35Barrie Heating & Air Conditioning844.8★ (88)32 km
36RK Air Systems845.0★ (38)30 km
37Hyde-Whipp Heating & Air Conditioning844.9★ (83)37 km
38705 HVAC845.0★ (27)28 km
39Canadian HVAC and Gas845.0★ (20)25 km
40Garry Mechanical inc845.0★ (27)28 km
41Tristar Mechanical Services834.8★ (22)25 km
42Mr. Song Heating & Cooling Inc.834.6★ (44)28 km
43Climax Heating & Air Conditioning & Condo HVAC Service834.9★ (40)33 km
44Trade Army Inc.834.9★ (55)29 km
45Biznest Canada Inc835.0★ (23)31 km
46Blu Hvac Inc835.0★ (32)34 km
47Sabbouh Mechanical835.0★ (32)34 km
48Anything Gas Heating & AC834.6★ (31)29 km
49HVAC Mechanical Systems834.8★ (73)40 km
50Superior Plumbing & Heating of Newmarket834.8★ (38)35 km

How we ranked emergency HVAC contractors in Alliston

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. 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
Reputation25%Bayesian-adjusted Google star rating
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2
Review volume10%log10(reviews + 1) against the list maximum
Recency10%Share of reviews from the last 12 months
Availability20%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radius
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)

Emergency HVAC contractors in Alliston: questions

Which HVAC contractors in Alliston are open 24/7?

25 on this list post 24/7 hours, including Reliance Yanch Heating, Air Conditioning & Plumbing, Affordable Comfort, Don's Heating and Cooling Ltd., Enercare and Custom Comfort ClimateCare.

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

Reliance Yanch Heating, Air Conditioning & Plumbing is #1, with a CR Score of 92 out of 100 on emergency weights.

How are emergency HVAC contractors in Alliston ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. 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 Alliston

  1. October 2026: CR Scores recalculated for 217 hvac contractors serving Alliston.

More emergency and heating and cooling pages