30 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Ottawa: Lanphierd Heating and Cooling, CR Score 92/100; 5.0★ from 70 Google reviews; open 24/7.
Best for emergencies (open 24/7): Triple Service Inc., posts 24/7 hours; ranked #2 of 30.
Most-reviewed: Just In Time Heating, Air Conditioning & Plumbing Services, 1,048 Google reviews at 4.9★, the most of 30 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
30 Ottawa HVAC contractors are ranked here by CR Score, from 8 published factors. 10 are open 24/7, 11 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.8★ across 30 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Lanphierd Heating and Cooling | 92 | 5.0★ (70) | Ottawa | 24/7 | Overall |
| 2 | Triple Service Inc. | 89 | 4.8★ (699) | Mendota, 20 mi away | 24/7 | Emergencies |
| 3 | Hometown Heating & Cooling Co | 89 | 4.8★ (34) | Ottawa | 24/7 | — |
| 4 | EZ-Air Heating & Cooling | 88 | 5.0★ (230) | Morris, 23 mi away | 24/7 | — |
| 5 | Advanced Heating & Air Of Illinois, Inc. | 87 | 5.0★ (10) | Ottawa | 24/7 | — |
| 6 | Starved Rock Heating & Cooling | 87 | 4.5★ (15) | Ottawa | 24/7 | — |
| 7 | Just In Time Heating, Air Conditioning & Plumbing Services | 87 | 4.9★ (1,048) | Sandwich, 25 mi away | Sat · Sun · Evenings | Most reviews |
| 8 | John's Service and Sales, Inc. | 86 | 4.5★ (82) | Peru, 12 mi away | 24/7 | — |
| 9 | One Stop Heating & Cooling | 84 | 5.0★ (31) | Mendota, 21 mi away | 24/7 | — |
| 10 | Correa Heating & Air Conditioning | 83 | 5.0★ (20) | Mendota, 21 mi away | 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 availability: 5.0★ from 70 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Mendota, 20 mi away
Ranked #2 because of its Google rating and availability: 4.8★ from 699 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ottawa
Ranked #3 because of its Google rating and availability: 4.8★ from 34 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Morris, 23 mi away
Ranked #4 because of its Google rating and availability: 5.0★ from 230 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ottawa
Ranked #5 because of its Google rating and availability: 5.0★ from 10 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ottawa
Ranked #6 because of its Google rating and availability: 4.5★ from 15 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sandwich, 25 mi away
Ranked #7 because of its Google rating and review volume: 4.9★ from 1,048 Google reviews, the most Google reviews on this list (1,048).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Peru, 12 mi away
Ranked #8 because of its Google rating and availability: 4.5★ from 82 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Mendota, 21 mi away
Ranked #9 because of its Google rating and availability: 5.0★ from 31 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Mendota, 21 mi away
Ranked #10 because of its Google rating and availability: 5.0★ from 20 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Peru, 17 mi away
Ranked #11 because of its Google rating and availability: 5.0★ from 16 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ottawa
Ranked #12 because of its Google rating and trade focus: 3.3★ from 4 Google reviews, listed on Google as “Heating contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Ottawa
Ranked #13 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “HVAC contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Spring Valley, 19 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 155 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sandwich, 23 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 106 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sandwich, 21 mi away
Ranked #16 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 Morris, 22 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 100 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Peru, 16 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 38 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ottawa
Ranked #19 because of its Google rating and trade focus: 3.2★ from 5 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Ottawa
Ranked #20 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Streator, 15 mi away
Ranked #21 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Morris, 22 mi away
Ranked #22 because of its Google rating and trade focus: 4.4★ from 31 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Streator, 14 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Plano, 15 mi away
Ranked #24 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Heating contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sandwich, 25 mi away
Ranked #25 because of its Google rating and trade focus: 4.3★ from 15 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #30, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Illinois Valley Plumbing Heating | 68 | 3.7★ (12) | In Ottawa |
| 27 | Family Repair Service LLC | 67 | 4.5★ (8) | 22 mi |
| 28 | Metcalf Martin Plumbing-Heating Inc | 67 | 4.2★ (26) | 16 mi |
| 29 | Barry Plumbing & Heating Inc | 64 | 4.6★ (11) | 23 mi |
| 30 | Transco Products Inc. | 61 | 4.3★ (3) | 17 mi |
11 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 |
|---|---|---|
| Am-Pm Heating Air Conditioning Inc | 5.0★ (1) | 22 mi |
| BUK Mechanical | 24 mi | |
| Busy Bee Electric | In Ottawa | |
| Campbell Plumbing & Heating | 21 mi | |
| Harper Heating and Cooling | 5.0★ (1) | 24 mi |
| Mendez General Contractor | 5.0★ (2) | 18 mi |
| Senica Cooling & Heating | 10 mi | |
| Service Pros | 14 mi | |
| Specialist Air Duct Clean | 5.0★ (1) | 21 mi |
| Turbaire one of Sandwich | 5.0★ (2) | 21 mi |
| Vitality HVAC/DUCT Cleaning | 5.0★ (1) | 19 mi |
National price ranges in USD, not adjusted for Ottawa. 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 Illinois, 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 30 Ottawa 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 Ottawa 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 |