12 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in St Johnsbury: Trombly Plumbing & Heating LLC, CR Score 85/100; 3.8★ from 22 Google reviews.
Best for emergencies (open 24/7): Murrays Heating and Cooling, posts 24/7 hours; ranked #2 of 12.
Most-reviewed: Roland C Abbott Plumbing & Heating, LLC, 37 Google reviews at 4.2★, the most of 12 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
12 St Johnsbury HVAC contractors are ranked here by CR Score, from 8 published factors. 1 is open 24/7, 2 open Saturdays and 1 open Sundays, based on posted hours. The median Google rating is 4.5★ across 12 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Trombly Plumbing & Heating LLC | 85 | 3.8★ (22) | St Johnsbury | — | Overall |
| 2 | Murrays Heating and Cooling | 80 | 5.0★ (17) | Lyndon, 13 mi away | 24/7 | Emergencies |
| 3 | Johnson's Heating & Plumbing | 80 | 4.2★ (9) | Lyndon, 8 mi away | Sat · Sun · Evenings | — |
| 4 | Cornell Plumbing & Heating Inc | 78 | 5.0★ (7) | Lyndon, 11 mi away | — | — |
| 5 | Jeff MacKay Mechanical | 78 | 4.9★ (32) | Saint Johnsbury, 14 mi away | — | — |
| 6 | Roland C Abbott Plumbing & Heating, LLC | 76 | 4.2★ (37) | Saint Johnsbury, 15 mi away | — | Most reviews |
| 7 | Harris Plumbing & Heating | 73 | 4.5★ (26) | Lyndon, 7 mi away | — | — |
| 8 | Bourne's Energy | 72 | 3.2★ (10) | Lyndon, 8 mi away | — | — |
| 9 | Harris Plumbing & Heating Inc | 71 | 4.4★ (21) | Lyndon, 8 mi away | — | — |
| 10 | Brien's Heating & Plumbing | 71 | 4.2★ (5) | Saint Johnsbury, 13 mi away | — | — |
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 trade focus: 3.8★ from 22 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Lyndon, 13 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lyndon, 8 mi away
Ranked #3 because of its Google rating and trade focus: 4.2★ from 9 Google reviews, listed on Google as “Heating contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lyndon, 11 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Heating contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Saint Johnsbury, 14 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 32 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Saint Johnsbury, 15 mi away
Ranked #6 because of its Google rating and review volume: 4.2★ from 37 Google reviews, the most Google reviews on this list (37).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lyndon, 7 mi away
Ranked #7 because of its Google rating and review volume: 4.5★ from 26 Google reviews, 26 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lyndon, 8 mi away
Ranked #8 because of its Google rating and trade focus: 3.2★ from 10 Google reviews, listed on Google as “Heating contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lyndon, 8 mi away
Ranked #9 because of its Google rating and review volume: 4.4★ from 21 Google reviews, 21 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Saint Johnsbury, 13 mi away
Ranked #10 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Saint Johnsbury, 7 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Lyndon, 15 mi away
Ranked #12 because of its Google rating and availability: 5.0★ from 4 Google reviews, open Saturdays until 9:30 PM.
Based on 6 of 8 factors; credentials and recency not yet collected.
6 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 |
|---|---|---|
| Green Mountain Heating CO | 8 mi | |
| Greenwood's Plumbing & Heating | 3.0★ (2) | In St Johnsbury |
| Kevin's Heating | 9 mi | |
| Northeast Propane Services | 5.0★ (1) | In St Johnsbury |
| Pellets Now | 5.0★ (1) | In St Johnsbury |
| TLC Dryer Vent Cleaning Services Saint Johnsbury, VT | In St Johnsbury |
National price ranges in USD, not adjusted for St Johnsbury. 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 Vermont, 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 12 St Johnsbury 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 St Johnsbury 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 |