36 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Big Flats: Isaac Heating & Air Conditioning, CR Score 68/100; 4.8★ from 1,532 Google reviews; open 24/7.
Best for emergencies (open 24/7): Allen's Plumbing, Heating & A/C Inc., posts 24/7 hours; ranked #2 of 36.
Most-reviewed: Chalk's Heating & Air Conditioning, LLC, 149 Google reviews at 4.9★, the most of 36 ranked after Isaac Heating & Air Conditioning; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
36 Big Flats HVAC contractors are ranked here by CR Score, from ten published factors. 12 are open 24/7, 13 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.5★ across 36 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Isaac Heating & Air Conditioning | 68 | 4.8★ (1,532) | Big Flats | 24/7 | Overall |
| 2 | Allen's Plumbing, Heating & A/C Inc. | 60 | 4.7★ (89) | Elmira, 6 mi away | 24/7 | Emergencies |
| 3 | Pioneer Plumbing & HVAC | 60 | 5.0★ (42) | Elmira, 7 mi away | 24/7 | — |
| 4 | SplitClean, Mini Split & HVAC Coil Cleaning | 59 | 5.0★ (85) | Brooklyn, 17 mi away | 24/7 | — |
| 5 | Finger Lakes HVAC & R Inc | 58 | 5.0★ (5) | Big Flats | 24/7 | — |
| 6 | Chalk's Heating & Air Conditioning, LLC | 57 | 4.9★ (149) | Horseheads, 6 mi away | — | Most reviews |
| 7 | Ambient Heating and Air Conditioning | 57 | 4.9★ (95) | Corning, 2 mi away | — | — |
| 8 | Bill's Plumbing Heating & Air | 57 | 4.4★ (42) | Horseheads, 13 mi away | 24/7 | — |
| 9 | Bohart Heating Plumbing & Air Conditioning | 55 | 5.0★ (10) | Southport, 13 mi away | 24/7 | — |
| 10 | Aaron’s Heating and Air Conditioning, Inc. | 55 | 4.7★ (77) | Corning, 6 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 review volume: 4.8★ from 1,532 Google reviews, the most in Big Flats.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elmira, 6 mi away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 89 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elmira, 7 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 42 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brooklyn, 17 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 85 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Big Flats
Ranked #5 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Horseheads, 6 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 149 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Corning, 2 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 95 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Horseheads, 13 mi away
Ranked #8 because of its Google rating and trade focus: 4.4★ from 42 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Southport, 13 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Corning, 6 mi away
Ranked #10 because of its Google rating and trade focus: 4.7★ from 77 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elmira, 7 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 16 Google reviews, listed on Google as “HVAC contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Ithaca, 21 mi away
Ranked #12 because of its Google rating and trade focus: 4.5★ from 38 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Berkley, 2 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Big Flats
Ranked #14 because of its Google rating and trade focus: 3.5★ from 36 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elmira, 7 mi away
Ranked #15 because of its Google rating and trade focus: 4.7★ from 50 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Big Flats
Ranked #16 because of its Google rating and trade focus: 4.2★ from 33 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Corning, 5 mi away
Ranked #17 because of its Google rating and trade focus: 4.4★ from 8 Google reviews, listed on Google as “Heating contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Horseheads, 6 mi away
Ranked #18 because of its Google rating and trade focus: 4.0★ from 3 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Big Flats
Ranked #19 because of its Google rating and trade focus: 3.9★ from 29 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elmira, 6 mi away
Ranked #20 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Heating contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Elmira, 8 mi away
Ranked #21 because of its Google rating and trade focus: 4.6★ from 28 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bath, 20 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elmira, 7 mi away
Ranked #23 because of its Google rating and trade focus: 3.6★ from 27 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elmira, 6 mi away
Ranked #24 because of its Google rating and trade focus: 4.0★ from 28 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Corning, 6 mi away
Ranked #25 because of its Google rating and trade focus: 2.0★ 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 #27 to #27, in CR Score order; each links to its profile. We publish the top 27 of 36 ranked HVAC contractors here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 27 | Struble Plumbing & Heating | 50 | 3.0★ (11) | 6 mi |
National price ranges in USD, not adjusted for Big Flats. 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 36 Big Flats 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 Big Flats 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 |