224 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Welland: Reliance Heating, Air Conditioning & Plumbing, CR Score 90/100; 4.8★ from 2,986 Google reviews; open 24/7.
Best for emergencies (open 24/7): Mr. Furnace Heating and Air Conditioning, posts 24/7 hours; ranked #2 of 224.
Most-reviewed: Reimer Heating, Cooling & Plumbing, 8,360 Google reviews at 4.9★, the most of 224 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
224 Welland HVAC contractors are ranked here by CR Score, from 8 published factors. 95 are open 24/7, 145 open Saturdays and 119 open Sundays, based on posted hours. The median Google rating is 4.8★ across 224 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Reliance Heating, Air Conditioning & Plumbing | 90 | 4.8★ (2,986) | St. Catharines, 21 km away | 24/7 | Overall |
| 2 | Mr. Furnace Heating and Air Conditioning | 90 | 4.8★ (2,672) | St. Catharines, 21 km away | 24/7 | Emergencies |
| 3 | Reimer Heating, Cooling & Plumbing | 90 | 4.9★ (8,360) | Cheektowaga, 39 km away | 24/7 | Most reviews |
| 4 | Zenner & Ritter Home Services | 90 | 4.9★ (5,592) | Buffalo, 36 km away | 24/7 | — |
| 5 | T-Mark Plumbing, Heating & Cooling- Buffalo | 90 | 4.9★ (3,978) | Buffalo, 33 km away | 24/7 | — |
| 6 | Roy's Plumbing, Heating, Cooling & Electrical | 89 | 4.8★ (3,074) | Tonawanda, 28 km away | 24/7 | — |
| 7 | Williams Kool Heat | 89 | 4.9★ (560) | Welland | Sat · Sun · Evenings | — |
| 8 | Just Right Heating & Cooling | 89 | 5.0★ (384) | Grand Island, 23 km away | 24/7 | — |
| 9 | Evans Heating & Cooling | 89 | 4.8★ (822) | Niagara Falls, 20 km away | 24/7 | — |
| 10 | Enercare | 89 | 4.6★ (2,788) | St. Catharines, 21 km away | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 in Welland
Based in St. Catharines, 21 km away
Ranked #1 because of its Google rating and availability: 4.8★ from 2,986 Google reviews, open 24/7.
Based in St. Catharines, 21 km away
Ranked #2 because of its Google rating and availability: 4.8★ from 2,672 Google reviews, open 24/7.
Based in Cheektowaga, 39 km away
Ranked #3 because of its Google rating and review volume: 4.9★ from 8,360 Google reviews, the most Google reviews on this list (8,360).
Based in Buffalo, 36 km away
Ranked #4 because of its Google rating and availability: 4.9★ from 5,592 Google reviews, open 24/7.
Based in Buffalo, 33 km away
Ranked #5 because of its Google rating and availability: 4.9★ from 3,978 Google reviews, open 24/7.
Based in Tonawanda, 28 km away
Ranked #6 because of its Google rating and availability: 4.8★ from 3,074 Google reviews, open 24/7.
Based in Welland
Ranked #7 because of its Google rating and trade focus: 4.9★ from 560 Google reviews, listed on Google as “HVAC contractor”.
Based in Grand Island, 23 km away
Ranked #8 because of its Google rating and availability: 5.0★ from 384 Google reviews, open 24/7.
Based in Niagara Falls, 20 km away
Ranked #9 because of its Google rating and availability: 4.8★ from 822 Google reviews, open 24/7.
Based in St. Catharines, 21 km away
Ranked #10 because of its Google rating and availability: 4.6★ from 2,788 Google reviews, open 24/7.
Based in St. Catharines, 16 km away
Ranked #11 because of its Google rating and availability: 4.8★ from 349 Google reviews, open 24/7.
Based in Niagara Falls, 23 km away
Ranked #12 because of its Google rating and availability: 4.9★ from 405 Google reviews, open 24/7.
Based in Welland
Ranked #13 because of its Google rating and availability: 5.0★ from 27 Google reviews, open 24/7.
Based in Amherst, 37 km away
Ranked #14 because of its Google rating and availability: 4.9★ from 1,236 Google reviews, open 24/7.
Based in Welland
Ranked #15 because of its Google rating and availability: 4.6★ from 56 Google reviews, open 24/7.
Based in Welland
Ranked #16 because of its Google rating and availability: 5.0★ from 17 Google reviews, open 24/7.
Based in St. Catharines, 23 km away
Ranked #17 because of its Google rating and availability: 5.0★ from 114 Google reviews, open 24/7.
Based in Niagara Falls, 16 km away
Ranked #18 because of its Google rating and availability: 4.8★ from 123 Google reviews, open 24/7.
Based in Niagara Falls, 15 km away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 336 Google reviews, listed on Google as “HVAC contractor”.
Based in Welland
Ranked #20 because of its Google rating and availability: 5.0★ from 12 Google reviews, open 24/7.
Based in Port Colborne, 13 km away
Ranked #21 because of its Google rating and availability: 5.0★ from 38 Google reviews, open 24/7.
Based in Kenmore, 29 km away
Ranked #22 because of its Google rating and availability: 4.7★ from 796 Google reviews, open 24/7.
Based in Port Colborne, 9 km away
Ranked #23 because of its Google rating and availability: 4.8★ from 34 Google reviews, open 24/7.
Based in Welland
Ranked #24 because of its Google rating and availability: 4.9★ from 121 Google reviews, open 24/7.
Based in Welland
Ranked #25 because of its Google rating and trade focus: 4.9★ from 88 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 224 ranked HVAC contractors here; the rest are on their profiles.
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 |
|---|---|---|
| Affordable HVAC 716 | 5.0★ (2) | 27 km |
| AIR 1 HEATING AND COOLING | 5.0★ (1) | 12 km |
| Air In Motion | 5.0★ (1) | 16 km |
| All Star Mechanical | 1.0★ (1) | 18 km |
| Bronson Heating and Air Conditioning | 3.0★ (2) | 26 km |
| Call Associates Heating & Air Conditioning | 3.0★ (2) | 34 km |
| Carlton 5 Mechanical Services | 4.1★ (13) | 15 km |
| Climate Diagnostics | 5.0★ (66) | 39 km |
| EAS Heating & Air Cond | 2.5★ (2) | 22 km |
| H.W. Bryk and Sons | 4.3★ (75) | 24 km |
| Heatech Mechanical | 3.0★ (2) | 18 km |
| JKJ Heating | 5.0★ (1) | In Welland |
| John Lock Air Conditioning & Heating Service Inc. | 4.7★ (140) | 40 km |
| Kee Energy Niagara In-Floor Heating | In Welland | |
| Lennox | 4.0★ (2) | 35 km |
| Pro Desk at RONA | 4.5★ (2) | In Welland |
| Red Seal Mechanical | 5.0★ (1) | 14 km |
| Regional Mechanical (Niagara) Inc. | 5.0★ (1) | 18 km |
| Simple Furnace Solutions | 5.0★ (1) | 15 km |
| The Enviro-Niagara Group | 4.3★ (96) | 24 km |
US national ranges converted to CAD, not adjusted for Welland. 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 224 Welland 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 Welland 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 |