65/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 6,771 Google reviews, the most in Islip.
- 4.8★ from 6,771 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 260 Smith St, Farmingdale, NY 11735
Best HVAC Contractors in Islip, NY (2026)
747 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Islip: Universe Home Services, CR Score 65/100; 4.8★ from 6,771 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Apple Air Heating Cooling Electric and Plumbing, posts 24/7 hours; ranked #2 of 747.
- 2
Most-reviewed: Apple Air Heating Cooling Electric and Plumbing, 4,690 Google reviews at 4.8★, the most of 747 ranked after Universe Home Services; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
747 Islip HVAC contractors are ranked here by CR Score, from ten published factors. 245 are open 24/7, 467 open Saturdays and 326 open Sundays, based on posted hours. The median Google rating is 4.8★ across 747 rated businesses.
Top 10 HVAC contractors in Islip at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Universe Home Services | 65 | 4.8★ (6,771) | Farmingdale, 11 mi away | 24/7 | Overall |
| 2 | Apple Air Heating Cooling Electric and Plumbing | 64 | 4.8★ (4,690) | Farmingdale, 11 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Dashing Dan's Plumbing & Heating Inc. | 64 | 4.9★ (764) | West Islip, 5 mi away | 24/7 | — |
| 4 | Tragar Home Services | 63 | 4.9★ (3,757) | Hicksville, 16 mi away | 24/7 | — |
| 5 | Cool Power LLC | 63 | 4.9★ (630) | Ronkonkoma, 7 mi away | 24/7 | — |
| 6 | Energywise Inc | 63 | 4.9★ (514) | Ronkonkoma, 6 mi away | 24/7 | — |
| 7 | Wilson's Plumbing Heating HVAC & Electric | 63 | 5.0★ (258) | Bay Shore, 5 mi away | 24/7 | — |
| 8 | Suffolk Plumbing Inc | 62 | 4.9★ (797) | Amityville, 11 mi away | 24/7 | — |
| 9 | GallettAir Inc. Heating & Air Conditioning | 62 | 4.9★ (406) | West Babylon, 8 mi away | 24/7 | — |
| 10 | HomeServe of Long Island | 61 | 4.6★ (1,573) | Farmingdale, 11 mi away | 24/7 | — |
The 747 best HVAC contractors in Islip, ranked
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.
Based in Farmingdale, 11 mi away
64/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 4,690 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 4,690 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 700 Broadhollow Rd, Farmingdale, NY 11735
Based in West Islip, 5 mi away
64/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 764 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 764 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 258 Higbie Ln, West Islip, NY 11795
Based in Hicksville, 16 mi away
63/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 3,757 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 3,757 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3 Washington Pkwy, Hicksville, NY 11801
Based in Ronkonkoma, 7 mi away
63/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 630 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 630 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 75 Air Park Dr, Ronkonkoma, NY 11779
Based in Ronkonkoma, 6 mi away
63/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 514 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 514 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2231 5th Ave Suite 26, Ronkonkoma, NY 11779
Based in Bay Shore, 5 mi away
63/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 258 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 258 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1062 Udall Rd, Bay Shore, NY 11706
Based in Amityville, 11 mi away
62/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 797 Google reviews, listed on Google as “Heating contractor”.
- 4.9★ from 797 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 76 Montauk Hwy, Amityville, NY 11701
Based in West Babylon, 8 mi away
62/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 406 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 406 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 860 Little East Neck Rd North, West Babylon, NY 11704
Based in Farmingdale, 11 mi away
61/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.6★ from 1,573 Google reviews, listed on Google as “HVAC contractor”.
- 4.6★ from 1,573 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 500 Bi County Blvd, Farmingdale, NY 11735
Based in Port Jefferson Station, 16 mi away
61/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 633 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 633 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 585 N Bicycle Path # 6, Port Jefferson Station, NY 11776
Based in Bohemia, 6 mi away
61/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.7★ from 1,230 Google reviews, listed on Google as “Air conditioning contractor”.
- 4.7★ from 1,230 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1610 Ocean Ave, Bohemia, NY 11716
Based in Deer Park, 7 mi away
61/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 328 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 328 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 561 Acorn St unit d, Deer Park, NY 11729
Based in Lindenhurst, 9 mi away
61/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 194 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 194 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- Madison Ave, Lindenhurst, NY 11757
Based in Bay Shore, 3 mi away
61/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 112 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 112 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1557 5th Ave, Bay Shore, NY 11706
Based in Copiague, 10 mi away
61/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.8★ from 407 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 407 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 35 Court St, Copiague, NY 11726
Based in Massapequa, 12 mi away
61/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ from 590 Google reviews, listed on Google as “Heating contractor”.
- 4.8★ from 590 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5620 Old Sunrise Hwy, Massapequa, NY 11758
Based in West Babylon, 9 mi away
61/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.8★ from 321 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 321 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 40 Field St, West Babylon, NY 11704
#19 Jen Air Inc
Based in Bohemia, 6 mi away
61/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.9★ from 138 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 138 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1507 Smithtown Ave #17, Bohemia, NY 11716
Based in Brentwood, 4 mi away
61/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.8★ from 114 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 114 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1158 Suffolk Ave C, Brentwood, NY 11717
Based in Bay Shore, 2 mi away
61/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 56 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 56 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Ronkonkoma, 6 mi away
61/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 117 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 117 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 154-1 Remington Blvd, Ronkonkoma, NY 11779
Based in Bohemia, 7 mi away
61/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.9★ from 135 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 135 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 481 Johnson Ave suite e, Bohemia, NY 11716
Based in Massapequa, 12 mi away
60/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.9★ from 283 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 283 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5788 Merrick Rd Suite 203, Massapequa, NY 11758
Based in Copiague, 10 mi away
60/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.7★ from 398 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 398 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1265D Montauk Hwy, Copiague, NY 11726
HVAC contractors ranked #26 to #50
#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 747 ranked HVAC contractors here; the rest are on their profiles.
Also serving Islip
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) | 6 mi |
| All Service Heating and Conditioning Inc. | 4.2★ (88) | 2 mi |
| Apollo Hvac Corp | 3.0★ (2) | 5 mi |
| Best Climate Control Corporation | 5.0★ (2) | 6 mi |
| Commercial Instrumentation Services | 2.0★ (2) | 6 mi |
| D&L Plumbing & Heating Service | 5.0★ (2) | 6 mi |
| Erol's Plumbing, Heating & A/C Inc. | 4.5★ (51) | 1 mi |
| Ferme & Son Energy Corporation. | 5.0★ (2) | 4 mi |
| Five Aces Plumbing Heating Corp | 5.0★ (2) | 5 mi |
| GVA Mechanical LLC | 5.0★ (2) | 6 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 Chillin HVACR LLC | 5.0★ (2) | 7 mi |
| Ljv mechanical | 5.0★ (104) | 9 mi |
| Madison & East Mechanical Corp | 5.0★ (2) | 5 mi |
| Michael James Industries, Inc. | 3.0★ (2) | 7 mi |
| Moimoi & Odeen | 1.0★ (2) | 6 mi |
| Proven HVAC Corp | 5.0★ (1) | In Islip |
| Schillco Mechanical | In Islip | |
| Tom Siegfried Plumbing & Heating Co | In Islip |
How much do HVAC contractors cost in Islip?
National price ranges in USD, not adjusted for Islip. 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 |
When to hire an HVAC contractor in New York
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.
How we ranked Islip HVAC contractors
We scored 747 Islip 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 Islip 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 |
HVAC contractors in Islip: frequently asked questions
Who is the best HVAC contractor in Islip?
By CR Score, the highest-ranked HVAC contractor in Islip, NY is Universe Home Services with a CR Score of 65/100. It has 4.8★ from 6,771 Google reviews. It is open 24/7. Apple Air Heating Cooling Electric and Plumbing (#2) and Dashing Dan's Plumbing & Heating Inc. (#3) follow. We ranked 747 HVAC contractors on ten factors, last updated October 22, 2026.
How many HVAC contractors are there in Islip?
ContractorsRanked ranks 747 HVAC contractors serving Islip, NY. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in Islip are open 24/7?
245 ranked HVAC contractors in Islip post 24/7 hours. The highest-ranked are Universe Home Services (#1), Apple Air Heating Cooling Electric and Plumbing (#2) and Dashing Dan's Plumbing & Heating Inc. (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Islip work on weekends?
467 of 747 ranked HVAC contractors post Saturday hours and 326 post Sunday hours. The highest-ranked open Saturdays are Universe Home Services (#1), Apple Air Heating Cooling Electric and Plumbing (#2) and Dashing Dan's Plumbing & Heating Inc. (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does ac replacement cost in Islip?
AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Islip. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Islip HVAC contractors have?
The median Google rating among 747 rated HVAC contractors in Islip is 4.8★, with a median of 17 reviews. Universe Home Services has the most, 6,771 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
When is the best time to hire an HVAC contractor in Islip?
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.
How does ContractorsRanked rank HVAC contractors?
Each HVAC contractor gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Update log for Islip
- October 2026: CR Scores recalculated for 747 hvac contractors serving Islip.
- October 2026: 2 duplicate listings merged.
More HVAC contractors and Islip pages
HVAC contractors near Islip
- HVAC contractors in East Islip, NY696 ranked
- HVAC contractors in Islip Terrace, NY704 ranked
- HVAC contractors in Bay Shore, NY800 ranked
- HVAC contractors in North Bay Shore, NY824 ranked
- HVAC contractors in Brentwood, NY844 ranked
- HVAC contractors in Central Islip, NY737 ranked
- HVAC contractors in Bay Wood, NY888 ranked
- HVAC contractors in West Islip, NY867 ranked
- HVAC contractors in Bohemia, NY617 ranked
- HVAC contractors in North Babylon, NY880 ranked
Other trades in Islip
- Roofers in Islip1434 ranked
- Plumbers in Islip499 ranked
- Electricians in Islip329 ranked
- General contractors in Islip923 ranked
- Painters in Islip182 ranked
- Landscapers in Islip296 ranked
- Handymen in Islip62 ranked
- Kitchen remodelers in Islip476 ranked
- Bathroom remodelers in Islip411 ranked
- Flooring contractors in Islip287 ranked
- Tile installers in Islip65 ranked
- Drywall contractors in Islip19 ranked
- Concrete contractors in Islip193 ranked
- Fence contractors in Islip138 ranked
- Deck builders in Islip168 ranked
- Siding contractors in Islip629 ranked
- Window installers in Islip540 ranked
- Gutter installers in Islip205 ranked
- Insulation contractors in Islip47 ranked
- Solar installers in Islip134 ranked
- Garage door repair companies in Islip106 ranked
- Foundation repair companies in Islip308 ranked
- Tree services in Islip273 ranked
- Masonry contractors in Islip515 ranked
- Water damage restoration companies in Islip864 ranked
- Home builders in Islip508 ranked
- Demolition contractors in Islip119 ranked
- All contractors in Islip