22 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Thunder Bay: Reliance Heating, Air Conditioning & Plumbing, CR Score 94/100; 4.6★ from 1,614 Google reviews; open 24/7.
Best for emergencies (open 24/7): Duct Cleaning Power Vac Services, posts 24/7 hours; ranked #2 of 22.
Most-reviewed: D.Peppard Mechanical Inc, 119 Google reviews at 4.9★, the most of 22 ranked after Reliance Heating, Air Conditioning & Plumbing; ranked #13.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
22 Thunder Bay HVAC contractors are ranked here by CR Score, from 8 published factors. 11 are open 24/7, 11 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.5★ across 22 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Reliance Heating, Air Conditioning & Plumbing | 94 | 4.6★ (1,614) | Thunder Bay | 24/7 | Overall |
| 2 | Duct Cleaning Power Vac Services | 90 | 4.9★ (82) | Thunder Bay | 24/7 | Emergencies |
| 3 | LDR Heating & Cooling | 88 | 4.9★ (38) | Thunder Bay | 24/7 | — |
| 4 | Allam Heating & Cooling ltd | 85 | 5.0★ (41) | Thunder Bay | 24/7 | — |
| 5 | Keenan Sheet Metal & Heating Ltd | 84 | 4.3★ (13) | Thunder Bay | 24/7 | — |
| 6 | Economy Heating Svc | 83 | 4.1★ (9) | Thunder Bay | 24/7 | — |
| 7 | Thermal Mechanical Systems Inc. | 83 | 3.7★ (22) | Thunder Bay | 24/7 | — |
| 8 | Beebe Mechanical Systems Limited | 82 | 3.4★ (5) | Thunder Bay | 24/7 | — |
| 9 | Kemp Mechanical Inc. | 82 | 5.0★ (5) | Thunder Bay | 24/7 | — |
| 10 | Dollar Contracting Ltd. | 82 | 5.0★ (4) | Thunder Bay | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.6★ from 1,614 Google reviews, the most Google reviews on this list (1,614).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #2 because of its Google rating and availability: 4.9★ from 82 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #3 because of its Google rating and availability: 4.9★ from 38 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #4 because of its Google rating and trade focus: 5.0★ from 41 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #5 because of its Google rating and availability: 4.3★ from 13 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #6 because of its Google rating and availability: 4.1★ from 9 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #7 because of its Google rating and availability: 3.7★ from 22 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #8 because of its Google rating and availability: 3.4★ from 5 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #9 because of its Google rating and availability: 5.0★ from 5 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #10 because of its Google rating and availability: 5.0★ from 4 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #11 because of its Google rating and availability: 3.2★ from 30 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #12 because of its Google rating and trade focus: 4.4★ from 37 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Thunder Bay
Ranked #13 because of its Google rating and trade focus: 4.9★ from 119 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #14 because of its Google rating and trade focus: 3.9★ from 114 Google reviews, listed on Google as “HVAC contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Thunder Bay
Ranked #15 because of its Google rating and trade focus: 3.7★ from 6 Google reviews, listed on Google as “HVAC contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Thunder Bay
Ranked #16 because of its Google rating and trade focus: 4.4★ from 29 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #17 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “General contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Thunder Bay
Ranked #18 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #19 because of its Google rating and trade focus: 4.1★ from 14 Google reviews, listed on Google as “Heating contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #20 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #21 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #22 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
20 more HVAC contractors within 40 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| A Villeneuve Mechanical Ltd | 4.7★ (36) | In Thunder Bay |
| A-TECH Engineering Ltd | In Thunder Bay | |
| ACR Mechanical Ltd | 5.0★ (2) | In Thunder Bay |
| Andrew Preston HVAC | In Thunder Bay | |
| Aqua North Plumbing & Heating | In Thunder Bay | |
| B. Gibson Mechanical | 4.2★ (52) | In Thunder Bay |
| Climatech Services | 5.0★ (1) | In Thunder Bay |
| Clow Darling Limited | 4.1★ (70) | In Thunder Bay |
| EH Price Thunder Bay | In Thunder Bay | |
| GAL Power Systems | 5.0★ (1) | In Thunder Bay |
| Honeywell | In Thunder Bay | |
| Keating Inc. | 5.0★ (4) | In Thunder Bay |
| Keenan Sheet Metal & Heating | In Thunder Bay | |
| Lakehead Insulation Inc | 5.0★ (2) | In Thunder Bay |
| Polar Mechanical | 1.0★ (2) | In Thunder Bay |
| Savitar Solar Heating | 4.0★ (2) | In Thunder Bay |
| Smart Comfort Heating & Cooling | 5.0★ (2) | In Thunder Bay |
| Sterling HVAC | In Thunder Bay | |
| Thunder bay Furnace and AC Service | In Thunder Bay | |
| Thunder Bay Insulations Limited | 4.6★ (16) | In Thunder Bay |
US national ranges converted to CAD, not adjusted for Thunder Bay. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | CA$5,460 | CA$8,400 | CA$11,350 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
| Furnace replacement | CA$3,970 | CA$6,770 | CA$9,690 | Per system, installed; typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
In Ontario, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.
We scored 22 Thunder Bay HVAC contractors on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Thunder Bay data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |