Top 50 of 425 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank
25 of the 50 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.
#1 for emergency heating and cooling in Dacula: Casteel Heating, Cooling, Plumbing & Electrical, open 24/7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
| Rank | Business | CR Score | Google rating | Based in | Hours |
|---|---|---|---|---|---|
| 1 | Casteel Heating, Cooling, Plumbing & Electrical | 67 | 4.9★ (6,399) | Lawrenceville, 4 mi away | 24/7 |
| 2 | Coolray Heating & Air Conditioning | 65 | 4.8★ (6,685) | Suwanee, 10 mi away | 24/7 |
| 3 | Peachtree Service Experts | 65 | 4.9★ (6,700) | Duluth, 12 mi away | 24/7 |
| 4 | Service 1st Pros Heating & Air Conditioning | 65 | 4.8★ (2,078) | Auburn, 4 mi away | 24/7 |
| 5 | Reliable Heating & Air, Plumbing and Electrical - Grayson | 65 | 4.8★ (3,335) | Snellville, 7 mi away | 24/7 |
| 6 | Keep Smiling Plumbing Electric Heating and Cooling | 64 | 4.9★ (3,664) | Loganville, 10 mi away | 24/7 |
| 7 | Henson Mechanical Heating Air and Plumbing | 63 | 4.9★ (1,653) | Loganville, 10 mi away | 24/7 |
| 8 | Climate Heroes Air Conditioning | 63 | 4.9★ (1,117) | Suwanee, 9 mi away | 24/7 |
| 9 | Techmazing Heating and Cooling | 63 | 5.0★ (898) | Loganville, 9 mi away | 24/7 |
| 10 | Bardi Heating, Cooling, Plumbing, Electrical | 63 | 4.7★ (7,525) | Norcross, 17 mi away | 24/7 |
24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.
#1Casteel Heating, Cooling, Plumbing & Electrical
Open 24/7 · 4.9 from 6,399 Google reviews
#2Coolray Heating & Air Conditioning
Open 24/7 · 4.8 from 6,685 Google reviews
Open 24/7 · 4.9 from 6,700 Google reviews
#4Service 1st Pros Heating & Air Conditioning
Open 24/7 · 4.8 from 2,078 Google reviews
#5Reliable Heating & Air, Plumbing and Electrical - Grayson
Open 24/7 · 4.8 from 3,335 Google reviews
#6Keep Smiling Plumbing Electric Heating and Cooling
Open 24/7 · 4.9 from 3,664 Google reviews
#7Henson Mechanical Heating Air and Plumbing
Open 24/7 · 4.9 from 1,653 Google reviews
#8Climate Heroes Air Conditioning
Open 24/7 · 4.9 from 1,117 Google reviews
24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 425 is on the HVAC contractors page.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 in Dacula
Based in Lawrenceville, 4 mi away
Ranked #1 because of its Google rating and trade focus: 4.9★ from 6,399 Google reviews, listed on Google as “HVAC contractor”.
Based in Suwanee, 10 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 6,685 Google reviews, listed on Google as “HVAC contractor”.
Based in Duluth, 12 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 6,700 Google reviews, listed on Google as “HVAC contractor”.
Based in Auburn, 4 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 2,078 Google reviews, listed on Google as “HVAC contractor”.
Based in Snellville, 7 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 3,335 Google reviews, listed on Google as “HVAC contractor”.
Based in Loganville, 10 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 3,664 Google reviews, listed on Google as “HVAC contractor”.
Based in Loganville, 10 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 1,653 Google reviews, listed on Google as “HVAC contractor”.
Based in Suwanee, 9 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 1,117 Google reviews, listed on Google as “HVAC contractor”.
Based in Loganville, 9 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 898 Google reviews, listed on Google as “Heating contractor”.
Based in Norcross, 17 mi away
Ranked #10 because of its Google rating and trade focus: 4.7★ from 7,525 Google reviews, listed on Google as “HVAC contractor”.
Based in Loganville, 12 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 1,409 Google reviews, listed on Google as “HVAC contractor”.
Based in Flowery Branch, 15 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 3,162 Google reviews, listed on Google as “HVAC contractor”.
Based in Buford, 10 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 615 Google reviews, listed on Google as “HVAC contractor”.
Based in Monroe, 8 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 497 Google reviews, listed on Google as “Furnace repair service”.
Based in Winder, 9 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 438 Google reviews, listed on Google as “HVAC contractor”.
Based in Norcross, 15 mi away
Ranked #16 because of its Google rating and trade focus: 4.4★ from 4,353 Google reviews, listed on Google as “HVAC contractor”.
Based in Winder, 4 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 149 Google reviews, listed on Google as “HVAC contractor”.
Based in Buford, 11 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 426 Google reviews, listed on Google as “HVAC contractor”.
Based in Alpharetta, 19 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 1,955 Google reviews, listed on Google as “HVAC contractor”.
Based in Loganville, 11 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 538 Google reviews, listed on Google as “HVAC contractor”.
Based in Winder, 11 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 260 Google reviews, listed on Google as “HVAC contractor”.
Based in Norcross, 18 mi away
Ranked #22 because of its Google rating and trade focus: 4.6★ from 3,109 Google reviews, listed on Google as “HVAC contractor”.
Based in Commerce, 3 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 80 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Monroe, 17 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 435 Google reviews, listed on Google as “HVAC contractor”.
Based in Canton, 25 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 2,157 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.
Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.
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 |
|---|---|---|
| Reputation | 15% | Google star rating, adjusted for how many reviews back it |
| Credentials | 15% | Active state license, bond and workers’ comp on file |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list |
| Recency | 5% | Share of reviews from the last 12 months |
| Availability | 15% | Weekly open hours, Saturday, Sunday, 24/7 or same-day |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) |
| Proximity | 5% | Based in the city scores highest, less the farther away it is |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are |