692 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Lake Ronkonkoma: Cool Power LLC, CR Score 64/100; 4.9★ from 630 Google reviews; open 24/7.
Best for emergencies (open 24/7): Energywise Inc, posts 24/7 hours; ranked #2 of 692.
Most-reviewed: Universe Home Services, 6,771 Google reviews at 4.8★, the most of 692 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
692 Lake Ronkonkoma HVAC contractors are ranked here by CR Score, from ten published factors. 224 are open 24/7, 433 open Saturdays and 301 open Sundays, based on posted hours. The median Google rating is 4.8★ across 692 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Cool Power LLC | 64 | 4.9★ (630) | Ronkonkoma, 4 mi away | 24/7 | Overall |
| 2 | Energywise Inc | 64 | 4.9★ (514) | Ronkonkoma, 3 mi away | 24/7 | Emergencies |
| 3 | Universe Home Services | 64 | 4.8★ (6,771) | Farmingdale, 16 mi away | 24/7 | Most reviews |
| 4 | Kintech Heating, Cooling & Plumbing | 64 | 5.0★ (633) | Port Jefferson Station, 7 mi away | 24/7 | — |
| 5 | Apple Air Heating Cooling Electric and Plumbing | 63 | 4.8★ (4,690) | Farmingdale, 17 mi away | 24/7 | — |
| 6 | Tragar Home Services | 62 | 4.9★ (3,757) | Hicksville, 20 mi away | 24/7 | — |
| 7 | US Air Conditioning & Heating | 62 | 4.8★ (582) | Port Jefferson Station, 7 mi away | 24/7 | — |
| 8 | Varsity Home Service | 62 | 4.7★ (1,230) | Bohemia, 4 mi away | 24/7 | — |
| 9 | Dashing Dan's Plumbing & Heating Inc. | 62 | 4.9★ (764) | West Islip, 13 mi away | 24/7 | — |
| 10 | Sunray Services - Air Conditioning and Heating | 62 | 4.5★ (494) | Nesconset, 2 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
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 because of its Google rating and trade focus: 4.9★ from 630 Google reviews, listed on Google as “HVAC contractor”.
Based in Ronkonkoma, 3 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 514 Google reviews, listed on Google as “HVAC contractor”.
Based in Farmingdale, 16 mi away
Ranked #3 because of its Google rating and review volume: 4.8★ from 6,771 Google reviews, the most in Lake Ronkonkoma.
Based in Port Jefferson Station, 7 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 633 Google reviews, listed on Google as “HVAC contractor”.
Based in Farmingdale, 17 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 4,690 Google reviews, listed on Google as “HVAC contractor”.
Based in Hicksville, 20 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 3,757 Google reviews, listed on Google as “HVAC contractor”.
Based in Port Jefferson Station, 7 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 582 Google reviews, listed on Google as “HVAC contractor”.
Based in Bohemia, 4 mi away
Ranked #8 because of its Google rating and trade focus: 4.7★ from 1,230 Google reviews, listed on Google as “Air conditioning contractor”.
Based in West Islip, 13 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 764 Google reviews, listed on Google as “HVAC contractor”.
Based in Nesconset, 2 mi away
Ranked #10 because of its Google rating and trade focus: 4.5★ from 494 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Bohemia, 4 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 138 Google reviews, listed on Google as “HVAC contractor”.
Based in Ronkonkoma, 3 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 117 Google reviews, listed on Google as “HVAC contractor”.
Based in Coram, 14 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 439 Google reviews, listed on Google as “HVAC contractor”.
Based in Bohemia, 5 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 135 Google reviews, listed on Google as “HVAC contractor”.
Based in Bay Shore, 11 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 258 Google reviews, listed on Google as “HVAC contractor”.
Based in Farmingville, 3 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 228 Google reviews, listed on Google as “HVAC contractor”.
Based in West Babylon, 14 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 406 Google reviews, listed on Google as “HVAC contractor”.
Based in Holtsville, 5 mi away
Ranked #18 because of its Google rating and trade focus: 4.7★ from 191 Google reviews, listed on Google as “HVAC contractor”.
Based in Amityville, 18 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 797 Google reviews, listed on Google as “Heating contractor”.
Based in Lake Ronkonkoma
Ranked #20 because of its Google rating and trade focus: 4.9★ from 46 Google reviews, listed on Google as “HVAC contractor”.
Based in Coram, 7 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 125 Google reviews, listed on Google as “HVAC contractor”.
Based in East Farmingdale, 7 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 107 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Middle Island, 9 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 2,447 Google reviews, listed on Google as “Heating contractor”.
Based in Brentwood, 6 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 114 Google reviews, listed on Google as “HVAC contractor”.
Based in Deer Park, 12 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 328 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. We publish the top 50 of 692 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 |
|---|---|---|
| Ace Climate Enterprises | 1.0★ (2) | 3 mi |
| Ace HVAC Service, Inc. | 5.0★ (2) | 4 mi |
| Action Air Refrigeration | 1.0★ (2) | 4 mi |
| All Service Heating and Conditioning Inc. | 4.2★ (88) | 7 mi |
| Best Climate Control Corporation | 5.0★ (2) | 3 mi |
| Celco Heating & Air Conditioning | 4.7★ (861) | 25 mi |
| Crestivew Plumbing & Heating | 5.0★ (2) | 6 mi |
| EXIT777 - Renovation and maintenance service | 5.0★ (2) | 4 mi |
| Ferme & Son Energy Corporation. | 5.0★ (2) | 5 mi |
| Five Aces Plumbing Heating Corp | 5.0★ (2) | 3 mi |
| Island Air Heating and Cooling | 4.4★ (49) | 5 mi |
| Jet Air Co- Best Ventilation, Plumbing, Heating & Air Conditioning HVAC Contractor, Boiler installation Long Island, New York | 4.6★ (83) | 6 mi |
| Johnson Controls | 3.5★ (2) | 6 mi |
| Just Rite Heating & Cooling | 3.0★ (2) | 3 mi |
| Lechner Electric Inc | 5.0★ (2) | 5 mi |
| Madison & East Mechanical Corp | 5.0★ (2) | 4 mi |
| Michael James Industries, Inc. | 3.0★ (2) | 3 mi |
| One Hour Heating & Air Conditioning® | 4.5★ (210) | 12 mi |
| Storm Hvac Services Inc. | 2.5★ (2) | 4 mi |
| Sunset Refrigeration & AC | 5.0★ (2) | 3 mi |
National price ranges in USD, not adjusted for Lake Ronkonkoma. 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 New York, 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 692 Lake Ronkonkoma 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 Lake Ronkonkoma 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 |