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Emergency HVAC Contractors in Thunder Bay, ON (2026)

22 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank

11 of the 22 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 Thunder Bay: 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 Thunder Bay at a glance

Top emergency HVAC contractors in Thunder Bay at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Reliance Heating, Air Conditioning & Plumbing674.6★ (1,614)Thunder Bay24/7
2Duct Cleaning Power Vac Services634.9★ (82)Thunder Bay24/7
3Allam Heating & Cooling ltd625.0★ (41)Thunder Bay24/7
4LDR Heating & Cooling614.9★ (38)Thunder Bay24/7
5Thermal Mechanical Systems Inc.593.7★ (22)Thunder Bay24/7
6Keenan Sheet Metal & Heating Ltd594.3★ (13)Thunder Bay24/7
7Adduono's Sheet Metal & Heating Ltd593.2★ (30)Thunder Bay24/7
8Economy Heating Svc584.1★ (9)Thunder Bay24/7
9Kemp Mechanical Inc.585.0★ (5)Thunder Bay24/7
10Dollar Contracting Ltd.575.0★ (4)Thunder Bay24/7

Call an emergency HVAC contractor in Thunder Bay 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 22 emergency HVAC contractors in Thunder Bay, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights.

  3. #3 Allam Heating & Cooling ltd

    Based in Thunder Bay

    62/100CR Score

    Ranked #3 because of its Google rating and trade focus: 5.0★ from 41 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 41 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2717 Government Rd, Thunder Bay, ON P7G 1V4
    View profile for Allam Heating & Cooling ltd(807) 251-3585

  4. #4 LDR Heating & Cooling

    Based in Thunder Bay

    61/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.9★ from 38 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.9★ from 38 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    306 Sillesdale Crescent, Thunder Bay, ON P7C 1S6
    View profile for LDR Heating & Cooling(807) 476-6109

  8. #8 Economy Heating Svc

    Based in Thunder Bay

    58/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.1★ from 9 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.1★ from 9 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1600 Frederica St W, Thunder Bay, ON P7E 3Z2
    View profile for Economy Heating Svc(807) 623-4328

  9. #9 Kemp Mechanical Inc.

    Based in Thunder Bay

    58/100CR Score

    Ranked #9 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 5 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    180 Belview Rd, Thunder Bay, ON P7G 1L6
    View profile for Kemp Mechanical Inc.(807) 473-7999

  10. #10 Dollar Contracting Ltd.

    Based in Thunder Bay

    57/100CR Score

    Ranked #10 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 4 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    48 Carl Ave, Thunder Bay, ON P7B 4Z2
    View profile for Dollar Contracting Ltd.(807) 709-7997

  13. #13 Prestige Home Comfort

    Based in Thunder Bay

    51/100CR Score

    Ranked #13 because of its Google rating and trade focus: 4.4★ from 37 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 4.4★ from 37 Google reviews
    Address
    755 Tungsten St, Thunder Bay, ON P7B 6T1
    View profile for Prestige Home Comfort(807) 346-4353

  15. #15 D.Peppard Mechanical Inc

    Based in Thunder Bay

    45/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.9★ from 119 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.9★ from 119 Google reviews
    Hours
    Mon–Fri 8 AM–4 PM · Sat–Sun closed
    Address
    321 Cumberland St N, Thunder Bay, ON P7A 4P1
    View profile for D.Peppard Mechanical Inc(807) 577-4760

  16. #16 Ldr Heating & Cooling

    Based in Thunder Bay

    42/100CR Score

    Ranked #16 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “General contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 5.0★ from 3 Google reviews
    Address
    125 Hardisty St N, Thunder Bay, ON P7E 1A1
    View profile for Ldr Heating & Cooling(807) 476-6109

  17. #17 Klīmit Mechanical Ltd

    Based in Thunder Bay

    41/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.4★ from 29 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.4★ from 29 Google reviews
    Hours
    Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
    Address
    127 Algoma St S, Thunder Bay, ON P7B 3B7
    View profile for Klīmit Mechanical Ltd(807) 345-1205

  18. #18 Lakehead Burner Service Ltd

    Based in Thunder Bay

    40/100CR Score

    Ranked #18 because of its Google rating and trade focus: 4.1★ from 14 Google reviews, listed on Google as “Heating contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.1★ from 14 Google reviews
    Hours
    Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
    Address
    626 Waterloo St S, Thunder Bay, ON P7E 2C5
    View profile for Lakehead Burner Service Ltd(807) 473-1890

  19. #19 Control HVAC & Refrigeration Ltd.

    Based in Thunder Bay

    39/100CR Score

    Ranked #19 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 6 Google reviews
    Hours
    Mon–Thu 9 AM–4:30 PM · Fri 9 AM–3:30 PM · Sat–Sun closed
    Address
    1519 Donald St E, Thunder Bay, ON P7E 5W3
    View profile for Control HVAC & Refrigeration Ltd.(807) 473-0734

  20. #20 North West Industries Inc.

    Based in Thunder Bay

    39/100CR Score

    Ranked #20 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 4 Google reviews
    Hours
    Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
    Address
    170 Beck St, Thunder Bay, ON P7A 2J8
    View profile for North West Industries Inc.(807) 345-0262

  21. #21 Ward's Heating & Mechanical

    Based in Thunder Bay

    38/100CR Score

    Ranked #21 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.4★ from 5 Google reviews
    Hours
    Mon–Fri 8:30 AM–5 PM · Sat closed · Sun 8:30 AM–5 PM
    Address
    319B North, May St N, Thunder Bay, ON P7C 3R1
    View profile for Ward's Heating & Mechanical(807) 768-9779

How we ranked emergency HVAC contractors in Thunder Bay

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 Thunder Bay: questions

Which HVAC contractors in Thunder Bay are open 24/7?

11 on this list post 24/7 hours, including Reliance Heating, Air Conditioning & Plumbing, Duct Cleaning Power Vac Services, Allam Heating & Cooling ltd, LDR Heating & Cooling and Thermal Mechanical Systems Inc..

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

Reliance Heating, Air Conditioning & Plumbing is #1, with a CR Score of 67 out of 100 on emergency weights.

How are emergency HVAC contractors in Thunder Bay 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?

22 of the 22 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Thunder Bay

  1. October 2026: CR Scores recalculated for 22 hvac contractors serving Thunder Bay.

More emergency and heating and cooling pages