54 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Darlington: Alliance Heating and Cooling, CR Score 66/100; 5.0★ from 186 Google reviews; open 24/7.
Best for emergencies (open 24/7): Swift Services Heating, Cooling & Electrical, posts 24/7 hours; ranked #3 of 54.
Most-reviewed: Quality Service Company, 801 Google reviews at 4.9★, the most of 54 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
54 Darlington HVAC contractors are ranked here by CR Score, from ten published factors. 13 are open 24/7, 30 open Saturdays and 22 open Sundays, based on posted hours. The median Google rating is 4.6★ across 54 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Alliance Heating and Cooling | 66 | 5.0★ (186) | Darlington | 24/7 | Overall |
| 2 | Quality Service Company | 65 | 4.9★ (801) | Florence, 5 mi away | Sat · Sun | Most reviews |
| 3 | Swift Services Heating, Cooling & Electrical | 63 | 4.8★ (560) | Florence, 14 mi away | 24/7 | Emergencies |
| 4 | Air Solutions Heating and Cooling | 62 | 4.8★ (332) | Florence, 7 mi away | Sat · Sun · Evenings | — |
| 5 | Hill's Heating & Air Conditioning Services | 61 | 4.9★ (65) | Florence, 8 mi away | 24/7 | — |
| 6 | Mechanical Doctor, Inc | 61 | 4.8★ (29) | Rock Hill, 1 mi away | 24/7 | — |
| 7 | 1st Impressions Heating and Air | 61 | 5.0★ (20) | Monroe, 1 mi away | 24/7 | — |
| 8 | Synergy Climate Control Experts Darlington | 59 | 4.7★ (26) | Darlington | Sat · Sun · Evenings | — |
| 9 | Cook Comfort Systems LLC | 59 | 4.9★ (61) | Florence, 10 mi away | Sat · Sun | — |
| 10 | Allens Cooling and Heating | 59 | 5.0★ (248) | Florence, 21 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 trade focus: 5.0★ from 186 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 5 mi away
Ranked #2 because of its Google rating and review volume: 4.9★ from 801 Google reviews, the most in Darlington.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 14 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 560 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 7 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 332 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 8 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 65 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rock Hill, 1 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 29 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Monroe, 1 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darlington
Ranked #8 because of its Google rating and trade focus: 4.7★ from 26 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 10 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 61 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 21 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 248 Google reviews, listed on Google as “HVAC contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Florence, 10 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 6 mi away
Ranked #12 because of its Google rating and trade focus: 4.0★ from 32 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 12 mi away
Ranked #13 because of its Google rating and trade focus: 4.6★ from 32 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Indian Trail, 1 mi away
Ranked #14 because of its Google rating and trade focus: 4.4★ from 5 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darlington
Ranked #15 because of its Google rating and trade focus: 4.9★ from 23 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 9 mi away
Ranked #16 because of its Google rating and trade focus: 4.6★ from 171 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster, 1 mi away
Ranked #17 because of its Google rating and trade focus: 4.0★ from 27 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hartsville, 12 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 114 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 7 mi away
Ranked #19 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Greer, 1 mi away
Ranked #20 because of its Google rating and trade focus: 4.6★ from 33 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florence, 13 mi away
Ranked #21 because of its Google rating and trade focus: 3.7★ from 25 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sumter, 1 mi away
Ranked #22 because of its Google rating and trade focus: 3.9★ from 16 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darlington
Ranked #23 because of its Google rating and trade focus: 4.9★ from 17 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Indian Trail, 1 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 6 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darlington
Ranked #25 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Heating 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 #50, in CR Score order; each links to its profile. We publish the top 50 of 54 ranked HVAC contractors here; the rest are on their profiles.
20 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 |
|---|---|---|
| Accu-tech HVAC Services LLC | 4.0★ (2) | 1 mi |
| Ace Mechanical Heating & Cooling LLC | 5.0★ (1) | 1 mi |
| Advanced Air Systems | 1.4★ (11) | 10 mi |
| AirPure Technologies, LLC | 5.0★ (14) | 24 mi |
| Asheville Heating & AC | 1 mi | |
| Basic Heat and Air | 1.0★ (1) | 18 mi |
| BOLDER SERVICE COMPANY | 1.4★ (30) | 1 mi |
| C&S Heating and Air | 2.0★ (1) | 1 mi |
| Custom Mechanical Services, LLC | 5.0★ (2) | 1 mi |
| Easler hvac services | 1 mi | |
| Florence HVAC Experts | 5.0★ (2) | 18 mi |
| High Tech Heating & Air | 6 mi | |
| Huggins Heating & Cooling Inc | In Darlington | |
| Mccalls Sheet Metal | 1 mi | |
| Partee Heating and Air LLC | In Darlington | |
| Partee Heating and Air, LLC | 3.5★ (2) | 11 mi |
| RL Griffin Heating & Air Co. | 1 mi | |
| Rock Hill Heating & Air Conditioning | 1 mi | |
| Stanley Steemer | 4.9★ (1,189) | In Darlington |
| Trane Commercial Sales Office | 5.0★ (1) | 7 mi |
National price ranges in USD, not adjusted for Darlington. 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 South Carolina, South Carolina Contractor’s Licensing Board (LLR) licenses Mechanical contractor licenses for commercial work; residential specialty contractors register with the Residential Builders Commission.
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 South Carolina, air conditioning calls peak in the hottest summer months. Spring is the easiest time to book a tune-up or replacement, before the first heat wave.
We scored 54 Darlington 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 Darlington 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 |