How 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%94+22.8Value 14%100+14.1Replies to reviews 7%58+4.1Experts Score= 93Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.93SCOREMaertin Heating & Cooling
Joliet, IL · Grade ALetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20. · #7Position by Experts Score among all companies we track in this category. of 10 boiler installers · 5.0★ from 351 Google reviews
Report card
Percentile vs other boiler installers (100 = best)Each factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: craft & service and value; weakest: replies to reviews.
Reviews for your job
Customers hired Maertin Heating & Cooling for 8 kinds of job.
Maertin Heating & Cooling for install AC
Clear ✕All 25 Google reviews tagged “Install AC” · showing 20
Everyone is very professional. They gave us several choices to choose from for both the AC and Furnace. We added an air scrubber which is amazing. They explained all the options and once it was installed they made sure we totally understood everything and answered all questions. They keep everything so clean you…
I’ve used Maertin several times over the years and have never been dissatisfied. Always professional, prompt and thorough. Pricing is good. Would definitely recommend for both maintenance and trouble shooting of ac and heating. The last week of June of 2026 my 22 yr old plus AC failed. Couldn’t have been worse…
Whole team was very professional, prompt, knowledgeable, and thorough. They did an excellent job and followed up the next day. I got exactly what I wanted and strongly recommend utilizing their services.
Called Martin Heating and Cooling for service and as always prompt service. They are great. Scott and his team are very trustworthy and knowledgeable. We have been working with them for as far as I can remember (years) and do not ever think to call anyone else with HVAC issues. Ended up replacing both furnaces…
Detailed professional installation and explanation of how the units operate
Great work installing AC & Furnace. Professional job and cleaned up like they were never there.
Scott and his team from the office to the field are very professional and organized. The project was completed on time and was a seamless installation.
I was a skeptic that our house that has terrible ductwork would ever be comfortable in the summer and winter time. We were told we needed new ductwork to see any improvement, which was financially overwhelming. However, Scott from Maertin told us that zoning and replacing our old a/c and furnance would help…
We have been doing business with Maertin Heating for many years. They have always been very professional and responsive to our needs. When our old AC died, they were able to install a good quality product for us in a timely manner. Brett H. was knowledgeable and efficient. We are very happy with Maertin Heating.
From start to finish the company crushed the HVAC replacement in my home. Techs were very professional and cleaned up everything when they were done. If your looked for new installs or servicing of equipment now this is the company to use!!!!!
I have been a customer of Maertin Heating & Cooling for several years now. A couple years ago I had a new furnace/AC unit installed. I have them come out twice a year to have my unit cleaned and check to make sure everything is work as it should. Scott and his team are the best. Everyone in the office is great,…
Great to deal with, timely service with excellent results!
Both Steve and Alec were wonderful. They explained everything to us, arrived on time, did the work on a timely basis
We only use Maertin Heating & Cooling and we cannot say enough about how happy we are with their service. They come out when they promise to be there so there is no guessing. The office staff and Scott helped us understand the details of the various options on their quote. In addition Scott patiently explained…
Polite, competent, professional they did a replacement of a 30 year old unit with out making a mess. After they left you could not see any thing out of place or any dirt left behind. I would recommend them to my family and friends.
Maertin is the best choice for HVAC needs in the Mokena, Frankfort, New Lenox area, by far. They are real and personable people that treat your house as their own and they have been the best for the 35 years that we've lived in the area. It goes back to our first experience on a very cold winter night when the…
Scott Maertin and his crew did an excellent job of installing a new furnace and air conditioner in our home. Their pricing was very competitive, they arrived on time along with being extremely thorough in their detailed explanation of how our new system works. We couldn’t be happier with our Maertin He Heating & Air Conditioning experience. Bob Hurley
So helpful from start to finish! Knowledgeable & very responsive! The work was done on time. They left no mess and were very efficient. Would highly recommend.
Service has everything to do with who you choose for your heating and air-conditioning. Scott and his team are like family to us, they have come to the rescue quite a few times over the years. Scott has always gone out of his way to help us with advice, making adjustments, and servicing our HVAC systems.
I have used this company for many years and I am completely satisified with their excellent customer service and relations, on time for call, highly knowledgably about my system and its history!
Price
Bar = middle half of what customers paid · gold mark = category median.
Price verdictsGoogle asks reviewers whether the price was great, reasonable or overpriced; these are their answers.
Jobs customers hired them for
| Job | Reviews | Category typical |
|---|---|---|
| HVAC system maintenance | 41 | $37–$264 |
| A/C system maintenance | 40 | $39–$318 |
| Heating system maintenance | 31 | $37–$317 |
| Heating system installation | 29 | $1.4k–$2.8k |
| Heating system repair | 29 | $78–$745 |
| A/C system repair | 25 | $216–$611 |
| Install AC | 24 | $1.6k–$3.2k |
| Install thermostat | 16 | — |
