48 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Saint Marys: Lochard HVAC, Plumbing and Service, CR Score 63/100; 4.9★ from 357 Google reviews; open 24/7.
Best for emergencies (open 24/7): Quality Mechanical Services, posts 24/7 hours; ranked #2 of 48.
Most-reviewed: Quality Mechanical Services, 168 Google reviews at 4.1★, the most of 48 ranked after Lochard HVAC, Plumbing and Service; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
48 Saint Marys HVAC contractors are ranked here by CR Score, from ten published factors. 8 are open 24/7, 10 open Saturdays and 9 open Sundays, based on posted hours. The median Google rating is 4.4★ across 48 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Lochard HVAC, Plumbing and Service | 63 | 4.9★ (357) | Sidney, 21 mi away | 24/7 | Overall |
| 2 | Quality Mechanical Services | 57 | 4.1★ (168) | Lima, 21 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Teamwork Heating & Cooling | 57 | 4.8★ (44) | Sidney, 20 mi away | 24/7 | — |
| 4 | American Heating & Air Conditioning | 56 | 4.4★ (73) | Lima, 21 mi away | 24/7 | — |
| 5 | Peterson Mechanical Repair LLC | 56 | 5.0★ (11) | Bright, 2 mi away | Sat · Sun · Evenings | — |
| 6 | Spartan Mechanical Services LLC | 55 | 5.0★ (26) | Sidney, 21 mi away | 24/7 | — |
| 7 | Kogge Inc Plumbing Heating | 55 | 4.1★ (74) | Saint Marys | — | — |
| 8 | Midwest Services | 54 | 5.0★ (3) | Celina, 5 mi away | 24/7 | — |
| 9 | Consolidated-Hunter Heating | 54 | 4.7★ (47) | Celina, 10 mi away | — | — |
| 10 | Riesen Plumbing & Heating Inc | 54 | 4.7★ (37) | Celina, 8 mi away | — | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.9★ from 357 Google reviews, the most in Saint Marys.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lima, 21 mi away
Ranked #2 because of its Google rating and trade focus: 4.1★ from 168 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sidney, 20 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 44 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lima, 21 mi away
Ranked #4 because of its Google rating and trade focus: 4.4★ from 73 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bright, 2 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sidney, 21 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Marys
Ranked #7 because of its Google rating and trade focus: 4.1★ from 74 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Celina, 5 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Celina, 10 mi away
Ranked #9 because of its Google rating and trade focus: 4.7★ from 47 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Celina, 8 mi away
Ranked #10 because of its Google rating and trade focus: 4.7★ from 37 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Delphos, 21 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 68 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Marys
Ranked #12 because of its Google rating and trade focus: 4.2★ from 16 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wapakoneta, 11 mi away
Ranked #13 because of its Google rating and trade focus: 4.1★ from 59 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Celina, 10 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 23 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lima, 18 mi away
Ranked #15 because of its Google rating and trade focus: 4.5★ from 66 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sidney, 21 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 23 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lima, 20 mi away
Ranked #17 because of its Google rating and trade focus: 4.5★ from 50 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wapakoneta, 11 mi away
Ranked #18 because of its Google rating and trade focus: 4.5★ from 16 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lima, 20 mi away
Ranked #19 because of its Google rating and trade focus: 3.2★ from 6 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wapakoneta, 11 mi away
Ranked #20 because of its Google rating and trade focus: 4.0★ from 8 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Van Wert, 25 mi away
Ranked #21 because of its Google rating and trade focus: 4.5★ from 70 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sidney, 20 mi away
Ranked #22 because of its Google rating and trade focus: 4.4★ from 34 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lima, 22 mi away
Ranked #23 because of its Google rating and trade focus: 3.9★ from 107 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Delphos, 19 mi away
Ranked #24 because of its Google rating and trade focus: 4.5★ from 27 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sidney, 22 mi away
Ranked #25 because of its Google rating and trade focus: 4.3★ from 15 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#1 to #25 are shown in full above. Here are #26 to #48, in CR Score order; each links to its profile.
18 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| All Temp Refrigeration | 5.0★ (2) | 22 mi |
| Area Heating & Cooling | 20 mi | |
| Carrier Heating & Cooling | 3.0★ (2) | 21 mi |
| Cleaves Mechanical Services | 5.0★ (2) | 17 mi |
| Dean Howell Plumbing Heating & AC | 10 mi | |
| DT CONSTRUCTION | 12 mi | |
| Eisert Plumbing & Heating | 4.0★ (1) | 12 mi |
| Enervise | 20 mi | |
| Frank Kingseed Plumbing & Heat | 2.5★ (2) | 22 mi |
| GEM Energy | 19 mi | |
| Houston Elec. Plb. Htg, inc. | 5.0★ (1) | 11 mi |
| HVAC Heroes | 5.0★ (1) | 21 mi |
| Masters Heating & Cooling | 20 mi | |
| MCL Chimney repairs & Chimney inspection Wapakoneta, OH | 10 mi | |
| Rm Heating & Air Conditioning | 1.0★ (1) | In Saint Marys |
| Sears Heating and Air Conditioning | In Saint Marys | |
| Smartway AC & Heating | 20 mi | |
| TDK Leasing | 20 mi |
National price ranges in USD, not adjusted for Saint Marys. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In Ohio, Ohio Construction Industry Licensing Board licenses Commercial HVAC and refrigeration contractor licenses.
No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.
Guide checked October 2026. How we verify licenses
In Ohio, 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 48 Saint Marys HVAC contractors on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, 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 Saint Marys data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |