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Emergency HVAC Contractors in Clarence-Rockland, ON (2026)

Top 50 of 102 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 Clarence-Rockland: Reliance Holmes Ottawa 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 Clarence-Rockland at a glance

Top emergency HVAC contractors in Clarence-Rockland at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Reliance Holmes Ottawa Heating, Air Conditioning & Plumbing634.7★ (8,352)Ottawa, 30 km away24/7
2Anchor Home Comfort634.9★ (3,646)Ottawa, 30 km away24/7
3Jeff’s HVAC services635.0★ (113)Clarence-Rockland24/7
4CoolHeat Comfort Systems624.7★ (186)Clarence-Rockland24/7
5Enercare624.7★ (5,672)Ottawa, 32 km away24/7
6P & P HVAC614.9★ (60)Clarence-Rockland24/7
7Advanced HVAC Inc.614.8★ (708)Ottawa, 25 km away24/7
8JD Swallow Heating & Cooling604.9★ (1,311)Ottawa, 36 km away24/7
9Peak Comfort & Reno605.0★ (21)Clarence-Rockland24/7
10Parent Heating & Cooling604.8★ (329)Ottawa, 25 km away24/7

Call an emergency HVAC contractor in Clarence-Rockland 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 Clarence-Rockland, 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 102 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.

  2. #2 Anchor Home Comfort

    Based in Ottawa, 30 km away

    63/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.9★ from 3,646 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 3,646 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1181 Parisien St, Ottawa, ON K1B 4W4
    View profile for Anchor Home Comfort(613) 704-4180

  5. #5 Enercare

    Based in Ottawa, 32 km away

    62/100CR Score

    Ranked #5 because of its Google rating and trade focus: 4.7★ from 5,672 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 5,672 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2160 Thurston Dr, Ottawa, ON K1G 6E1
    View profile for Enercare(613) 216-0023

  6. #6 P & P HVAC

    Based in Clarence-Rockland

    61/100CR Score

    Ranked #6 because of its Google rating and trade focus: 4.9★ from 60 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 60 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1547 Sequoia Dr, Cumberland, ON K4C 1C2
    View profile for P & P HVAC(613) 606-9798

  7. #7 Advanced HVAC Inc.

    Based in Ottawa, 25 km away

    61/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.8★ from 708 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 708 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5450 Canotek Rd #65, Gloucester, ON K1J 9G5
    View profile for Advanced HVAC Inc.(613) 833-9963

  11. #11 S.M HVAC inc

    Based in Clarence-Rockland

    59/100CR Score

    Ranked #11 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Heating contractor”.

    • 5.0★ from 14 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    174 Herbert St, Limoges, ON K0A 2M0
    View profile for S.M HVAC inc(613) 697-0960

  13. #13 APEX CVAC

    Based in Ottawa, 9 km away

    58/100CR Score

    Ranked #13 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 18 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for APEX CVAC(613) 777-5787

  15. #15 Pro Duct Solutions

    Based in Ottawa, 33 km away

    58/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.7★ from 295 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 295 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    385 Besserer St #41, Ottawa, ON K1N 6B6
    View profile for Pro Duct Solutions(613) 617-7874

  16. #16 Apple HVAC

    Based in Ottawa, 40 km away

    57/100CR Score

    Ranked #16 because of its Google rating and trade focus: 5.0★ from 220 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 220 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1468 Chatelain Ave, Ottawa, ON K1Z 8B1
    View profile for Apple HVAC(613) 315-7325

  17. #17 Zenith Eco Energy

    Based in Ottawa, 32 km away

    57/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.9★ from 123 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 123 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2100 Thurston Dr #13, Ottawa, ON K1G 4K8
    View profile for Zenith Eco Energy(613) 800-9022

  19. #19 Tempzone Hvac

    Based in Ottawa, 37 km away

    57/100CR Score

    Ranked #19 because of its Google rating and trade focus: 5.0★ from 100 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 100 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3399b McCarthy Rd, Ottawa, ON K1V 9G6
    View profile for Tempzone Hvac(613) 862-5551

  23. #23 The Energy Centre

    Based in Ottawa, 30 km away

    56/100CR Score

    Ranked #23 because of its Google rating and trade focus: 4.2★ from 146 Google reviews, listed on Google as “HVAC contractor”.

    • 4.2★ from 146 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1181 Newmarket St, Ottawa, ON K1B 4L1
    View profile for The Energy Centre(613) 706-1545

  25. #25 Cosenzo Mechanical

    Based in Queenswood Heights, 22 km away

    56/100CR Score

    Ranked #25 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 13 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6096 Buttonfield Pl, Orléans, ON K1W 1C1
    View profile for Cosenzo Mechanical(613) 261-6081

Top 50 of 102 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 Clarence-Rockland, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26ServicePlus Heating and Cooling564.9★ (37)33 km
27Ottawa Furnace Parts554.9★ (34)32 km
28Peak Comfort HVAC555.0★ (18)31 km
29ServicePlus Heating and Cooling554.8★ (19)32 km
30Eco Green Home Comfort544.9★ (21)35 km
31ServicePlus Heating and Cooling545.0★ (13)35 km
32Central Hvac Inc545.0★ (14)37 km
33ServicePlus Heating and Cooling545.0★ (21)40 km
34Canada Plumbing535.0★ (177)25 km
35DT HVAC Services Inc.535.0★ (7)36 km
36DH Plumbing & Heating524.9★ (110)39 km
37Quality HVAC525.0★ (6)37 km
38HVAC Trust - Heating & Cooling525.0★ (5)37 km
39Renova525.0★ (5)37 km
40Reggie's Services525.0★ (8)In Clarence-Rockland
41Superior Plumbing & Heating of Gatineau524.6★ (67)33 km
42MDM Combustion inc525.0★ (6)In Clarence-Rockland
43Novie Mechanical525.0★ (5)In Clarence-Rockland
44eSmartLive Ltd. (明智冷暖)525.0★ (5)40 km
45Platinum FloXpress Plumbing and Heating525.0★ (36)35 km
46TPH Plumbing & Heating Inc513.9★ (36)30 km
47Superior Plumbing & Heating of Ottawa504.6★ (14)31 km
48Gratton Home Comfort Inc.504.8★ (17)In Clarence-Rockland
49Caron Heating & Cooling Inc.505.0★ (63)16 km
50Cundell Plumbing & Heating LTD503.4★ (55)32 km

How we ranked emergency HVAC contractors in Clarence-Rockland

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 Clarence-Rockland: questions

Which HVAC contractors in Clarence-Rockland are open 24/7?

25 on this list post 24/7 hours, including Reliance Holmes Ottawa Heating, Air Conditioning & Plumbing, Anchor Home Comfort, Jeff’s HVAC services, CoolHeat Comfort Systems and Enercare.

Who is ranked #1 for emergency heating and cooling in Clarence-Rockland, ON?

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

How are emergency HVAC contractors in Clarence-Rockland 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 Clarence-Rockland

  1. October 2026: CR Scores recalculated for 102 hvac contractors serving Clarence-Rockland.

More emergency and heating and cooling pages