The Best HVAC Contractors in Indiana
We graded 10 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
From 113,436 Google reviews of 103 top-rated HVAC contractors nationwide; 10 of them in Indiana. Updated October 28, 2026.
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Best HVAC contractors in Indiana for thermostat installation
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Howald Heating, Air Conditioning & PlumbingHow Job match is calculatedBuilt only from reviews Google tagged “Thermostat installation”:Stars on this job 55%5.00★Number of such jobs 25%15Overall Experts Score 20%96Job match= 95Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.95
LCS Heating and CoolingHow Job match is calculatedBuilt only from reviews Google tagged “Thermostat installation”:Stars on this job 55%4.94★Number of such jobs 25%18Overall Experts Score 20%95Job match= 94Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.94
Action AirHow Job match is calculatedBuilt only from reviews Google tagged “Thermostat installation”:Stars on this job 55%5.00★Number of such jobs 25%3Overall Experts Score 20%89Job match= 79Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.79
Godby Heating Plumbing ElectricalHow Job match is calculatedBuilt only from reviews Google tagged “Thermostat installation”:Stars on this job 55%5.00★Number of such jobs 25%3Overall Experts Score 20%86Job match= 78Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.78
Appel Heating & Air ConditioningHow Job match is calculatedBuilt only from reviews Google tagged “Thermostat installation”:Stars on this job 55%4.67★Number of such jobs 25%12Overall Experts Score 20%82Job match= 74Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.74Job match = this company’s ★ on reviews Google tagged “Thermostat installation” (shrunk toward the category average when there are few), how many such jobs it has done, and its overall Experts Score.
What customers said about thermostat installation
Appel Heating & Air ConditioningHad a great experience. They came out when they said they would, good price, neat, didn’t try to oversell me and I feel like I was important to them. More importantly the guys working there really like the owner of the company and said so. Something you rarely hear these days. You always work harder and take care…
Howald Heating, Air Conditioning …Couldn’t be happier with the work that Joe Davis did in Servicing our furnace and air conditioner. He explained everything thoroughly, was on time and very friendly. Thank you Howald Heating and Air
LCS Heating and CoolingTop quality work and great system options. They removed our 20+ year old geothermal heat pump and installed a new high efficiency, cold weather heat pump. Sales rep and installers were all amazing!
Appel Heating & Air ConditioningI have been with Appel since June 2021 and they are amazing; the whole team is responsive and informative. The maintenance packages are affordable, and the technicians are respectful, knowledgeable and kind! My husband and I highly recommend them!
Appel Heating & Air ConditioningThe Appel team was great! Highly knowledgeable, on time, and affordable. I would recommend Appel to anyone.
LCS Heating and CoolingInstallation went smoothly, and my new system is up and running. LCS technicians are alway the kindest and most personable people.
Overall ratings
Experts Score 0–100Experts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. and a letter grade per factor (A = top 20% of HVAC contractors).
| # | Company | ScoreExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. | FactorsFactor grades, in orderSatisfaction (54%): Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Reliability (24%): How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Craft & service (0%): Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Value (14%): Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Momentum (0%): Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Replies to reviews (7%): How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.One letter per factor score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = below 20. | ★Google star rating as shown on Google Maps. | Typical billMedian bill customers of this company reported in their reviews (needs 3+ priced reviews). |
|---|---|---|---|---|---|
| 1 |  Good Guys Home ServicesCarmel, IN | A 96How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%96+52.4Reliability 24%95+23Value 14%100+14.1Replies to reviews 7%99+7Craft & service penalty94−0.6Experts Score= 96Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.95 | $239 |
| 2 | Howald Heating, Air Conditioning & PlumbingCarmel, IN | A 96How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%96+52.4Reliability 24%96+23.3Value 14%99+14Replies to reviews 7%100+7.1Craft & service penalty96−0.4Experts Score= 96Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.95 | $251 |
| 3 |  Sloderbeck Heating & Cooling, LLCCarmel, IN | A 95How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%96+52.4Reliability 24%96+23.3Value 14%100+14.1Replies to reviews 7%100+7.1Craft & service penalty81−1.9Experts Score= 95Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.95 | — |
| 4 | LCS Heating and CoolingCarmel, IN | A 95How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%94+51.3Reliability 24%94+22.8Value 14%100+14.1Replies to reviews 7%100+7.1Craft & service penalty99−0.1Experts Score= 95Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.94 | $166 |
| 5 |  Jons AirCarmel, IN | A 93How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%94+55.2Reliability 26%86+22.4Value 15%100+15.2Experts Score= 93Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AA– | 4.96 | $447 |
| 6 |  Peterman Brothers Heating, Cooling, Plumbing, and ElectricalCarmel, IN | A 92How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%95+55.8Reliability 26%94+24.5Value 15%80+12.2Experts Score= 92Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AA– | 4.96 | $196 |
| 7 |  Precision Comfort SystemsCarmel, IN | A 90How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%92+50.2Reliability 24%91+22.1Value 14%87+12.3Replies to reviews 7%90+6.4Craft & service penalty93−0.7Experts Score= 90Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.90 | $292 |
| 8 | Action AirCarmel, IN | A 89How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%90+49.1Reliability 24%86+20.8Value 14%100+14.1Replies to reviews 7%86+6.1Craft & service penalty89−1.1Experts Score= 89Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.89 | $142 |
| 9 | Godby Heating Plumbing ElectricalCarmel, IN | A 86How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%87+47.5Reliability 24%86+20.8Value 14%96+13.6Replies to reviews 7%81+5.7Craft & service penalty80−2Experts Score= 86Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.86 | $429 |
| 10 | Appel Heating & Air ConditioningCarmel, IN | A 82How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%84+45.8Reliability 24%79+19.2Value 14%100+14.1Replies to reviews 7%96+6.8Craft & service penalty88−1.2Momentum penalty74−2.6Experts Score= 82Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | ABAABA | 4.85 | $171 |
What jobs cost
What customers paid, from the price Google asks reviewers to report.
| Job | Low25th percentile: 1 in 4 customers paid less than this. | TypicalMedian of the bill customers reported in their Google review (Google asks reviewers for a price range; we use the middle of each range). | High75th percentile: 1 in 4 customers paid more than this. | FairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”. |
|---|---|---|---|---|
| HVAC system maintenance | $37 | $135 | $295 | 98% |
| A/C system maintenance | $39 | $192 | $393 | 98% |
| HVAC system repair | $205 | $393 | $933 | 96% |
| A/C system repair | $209 | $383 | $786 | 97% |
| Install AC | $1.4k | $2.1k | $3.2k | 98% |
| Heating system maintenance | $39 | $135 | $251 | 98% |
| Heating system installation | $1.4k | $1.9k | $2.8k | 97% |
| Repair HVAC | $216 | $353 | $495 | 97% |
| Heating system repair | $166 | $453 | $1.2k | 97% |
| Installation | $1.1k | $1.9k | $2.8k | 99% |
| Install thermostat | $35 | $124 | $329 | 98% |
| HVAC duct & vent installation | $1.1k | $1.9k | $2.8k | 95% |
HVAC Contractors in Indiana at a glance
How the 10 HVAC contractors we rated in Indiana compare, and what customers praise most.
Experts Score grades
A = score 80+, F = below 20.
- Grade A10100%
- Grade B00%
- Grade C00%
- Grade D00%
- Grade F00%
Google ratings
Average stars per company.
- 4.90★ and up770%
- 4.80–4.89★330%
- 4.60–4.79★00%
- Below 4.60★00%
What customers praise
Share of Google review highlights.
- Quality21,41020%
- Professionalism26,36724%
- Responsiveness22,39421%
- Punctuality22,05620%
- Value16,05215%
Was the price fair?
All price verdicts left with reviews.
- Great price6,12233%
- Reasonable10,20956%
- Overpriced5763%
- Not sure1,4518%
Price verdicts by year
Share calling it great / reasonable / overpriced.
How we grade
Satisfaction (54%) — Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.
Reliability (24%) — How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.
Craft & service (penalty, up to −10) — Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.
Value (14%) — Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.
Momentum (penalty, up to −10) — Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.
Replies to reviews (7%) — How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.