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ContractorsRanked

Emergency HVAC Contractors in Ancaster, ON (2026)

Top 50 of 370 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 Ancaster: 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 Ancaster at a glance

Top emergency HVAC contractors in Ancaster at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Reliance Heating, Air Conditioning & Plumbing924.8★ (27,515)Burlington, 22 km away24/7
2Boonstra Heating and Air Conditioning914.7★ (4,641)Hamilton, 12 km away24/7
3Guest Plumbing & HVAC Ancaster & Hamilton- Commercial & Residential Services914.8★ (452)Ancaster24/7
4Dynamic Heating & Cooling915.0★ (742)Hamilton, 12 km away24/7
5Spurr Heating & Air Conditioning914.9★ (1,184)Hamilton, 12 km away24/7
6AirPro Heating & Cooling905.0★ (139)Ancaster24/7
7Reliance Heating, Air Conditioning & Plumbing904.8★ (4,116)Brantford, 22 km away24/7
8Creature Comforts HVAC905.0★ (941)Burlington, 19 km away24/7
9HAMCO Heating and Cooling Ltd.894.8★ (624)Hamilton, 10 km away24/7
10Shipton's Heating & Cooling Ltd894.8★ (2,204)Burlington, 21 km away24/7

Call an emergency HVAC contractor in Ancaster 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 Ancaster, 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 370 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.

  13. #13 Enercare

    Based in Burlington, 18 km away

    89/100CR Score

    Ranked #13 because of its Google rating and availability: 4.7★ from 1,905 Google reviews, open 24/7.

    • 4.7★ from 1,905 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Enercare(905) 538-1102

  14. #14 Flashe Gas

    Based in Burlington, 22 km away

    89/100CR Score

    Ranked #14 because of its Google rating and availability: 5.0★ from 567 Google reviews, open 24/7.

    • 5.0★ from 567 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Flashe Gas(289) 244-2084

Top 50 of 370 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 Ancaster, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26MY HVAC Guy875.0★ (66)12 km
27Canadian Heating and Air Conditioning Inc.874.6★ (269)13 km
28Family HVAC Inc874.9★ (136)17 km
29KBS Heating and Cooling Services875.0★ (40)In Ancaster
30A1 Air Conditioning & Heating874.9★ (1,749)39 km
31Archie Horn & Son874.6★ (292)14 km
32D.A.D. HVAC875.0★ (55)12 km
33Hamilton Home Comfort874.8★ (353)23 km
34PRO Wave Solutions Inc.875.0★ (44)10 km
35Superior Plumbing & Heating of Hamilton864.9★ (67)14 km
36Precision HVAC Mech Inc864.9★ (429)30 km
37Adam's Air Systems - Heating and Air Conditioning864.7★ (170)16 km
38Elevate HVAC864.7★ (37)6 km
39Sada Air Heating and Cooling865.0★ (21)6 km
40Boehmers/Cronin Emery Home Services by Enercare864.8★ (1,534)39 km
41KMC Heating and Cooling Services Inc. Ontario, Canada865.0★ (118)24 km
42Infinite Home Comfort865.0★ (148)27 km
43Mak refrigeration LTD865.0★ (53)18 km
44Superior Plumbing & Heating of Burlington864.9★ (74)18 km
45Tabreed Thermal Control865.0★ (24)10 km
46Falcons Heating & Cooling855.0★ (114)27 km
47Wilson Air Ltd854.4★ (50)7 km
48City Heating and Cooling854.8★ (273)29 km
49Hy-Mark Home Comfort854.8★ (450)34 km
50Superior Plumbing & Heating of Brantford854.7★ (129)22 km

How we ranked emergency HVAC contractors in Ancaster

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 Ancaster: questions

Which HVAC contractors in Ancaster are open 24/7?

25 on this list post 24/7 hours, including Reliance Heating, Air Conditioning & Plumbing, Boonstra Heating and Air Conditioning, Guest Plumbing & HVAC Ancaster & Hamilton- Commercial & Residential Services, Dynamic Heating & Cooling and Spurr Heating & Air Conditioning.

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

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

How are emergency HVAC contractors in Ancaster 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 Ancaster

  1. October 2026: CR Scores recalculated for 370 hvac contractors serving Ancaster.
  2. October 2026: 1 duplicate listing merged.

More emergency and heating and cooling pages