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%95+51.8Reliability 24%93+22.5Value 14%100+14.1Replies to reviews 7%100+7.1Experts Score= 96Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.96SCOREComfort Zone Service
Joliet, IL · Grade ALetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20. · #4Position by Experts Score among all companies we track in this category. of 10 boiler installers · 5.0★ from 394 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: reliability.
Reviews for your job
Customers hired Comfort Zone Service for 8 kinds of job.
Comfort Zone Service for heating system maintenance
Clear ✕All 31 Google reviews tagged “Heating system maintenance”
What a fantastic job Josh did with joining the annual maintenance for my furnace. He answered all my questions and informed me of all the work he did. I would use Comfort Zone in the future for my household needs. Thank you Josh Joanne
Great experience every time when called upon! Great experience again w/Comfort Zone. Josh came out, answered questions and handled the service check like a champ.
Have been a customer customer for a few years. From the office staff to the techs, have always received stellar service!
Josh came out fixed are thermostat cleaned furnace, gave us some suggestions for future ease. We love comfort Zone always friendly courteous and professional.
Great friendly service provided by Josh. On time and described every step of the service. Josh was out again in April ‘26 to do a tune-up on the A/C. He recommended a surge protector on the A/C. Josh is very friendly and thorough. He did a great job once again. We had another great service with Jordan this time…
Josh provided excellent customer service
Josh was curtious and informative. Answered all my questions and got the furnance cleaned and checked out the vitals to see if within specs. Great job Josh.
Great Job!, Josh did a Great job! He came in and reconnected my phone to my Ecobee thermostat. I lost my cell phone and had to buy a new phone, I was afraid I'd screw something up, so he had it fixed in 5 minuntes. His main reason for coming was for the annual furnace check up. I belong to the maintenance program…
Been dealing with Comfort Zone for quite sometime. Always a great service experience. Josh is great. Very professional, friendly, and knowledgeable. Highly recommend them!!!
The company was great! They actually were running ahead of schedule and called me first thing to make sure I was ok with them coming earlier. Josh was detailed and explained everything to me. He worked efficiently and fast. He sold me on continued business and I would recommend them to anyone.
Josh did another great job with the routine maintenance required for the upcoming air conditioning season today! Josh is friendly, professional, and explains everything he is doing. I trust only Comfort Zone for both regular maintenance and emergency repair work. They are always timely, professional, and accurate…
I have used Comfort Zone for about 5 years and have never looked back. They are the perfect combination of professionalism, friendliness, expertise and reliability. Highly recommend! Josh maintained the tradition of great service!
Jacob did a great job! We needed heating system maintenance, and he was very professional. Thank you so much Comfort Zone for your excellent service!
Paul was very forward with everything he did for us and what he had to fix. Great costumer service! Very very nice guy.
I have used Comfort Zone for over 15 years for maintenance, repair, installation etc... Great service, professional, courteous, always responsive, never leave a mess and good value. All the techs I’ve had experience with are very professional , the owner Glenn is always very helpful. He has responded on very short…
Brendan is super friendly and knowledgeable. Identified my problem immediately and had it fixed right away. He gave the unit a thorough check while he was here and made sure I understood the issue.
Great company. I used them for both AC and heating maintenance and repairs. Easy to schedule the appointment; the repair tech is there on time, and every time they fix the issue the same day. I definitely would recommend them
Chad is so trustworthy and polite. We have used this family owned business for 4 years and would never consider changing. Always honest and fair. Always on time and prompt. Never any surprises. They never try and sell us something we don’t need.
Brenden and Marco installed a new high efficiency Carrier furnace, Aprilaire Humidifier and a Respicaire Air Sanitizer. The dual stage furnace, Aprilaire with its own blower and the Air Sanitizer work perfectly. A beautiful installation. Top quality professionals. Comfort Zone has been our HVAC EXPERTS for several years. Emil and Jill thank you!
Comfort Zone continually keeps you updated as to when the appointment is and when the technician is on the way! Chad was professional and attentive to the issues we were having. Fixed our heating issues that had been going on 2 years! So glad to have his help in the low temps we are experiencing currently and…
I have used them multiple times in the last two years for general maintenance and replacement of an AC unit. They have always been kind, responsive, professional, and trustworthy. They truly set the standard for exceptional customer service. Chad and Glen have both been to our homes to do various maintenance. Each…
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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 | 105 | $37–$264 |
| A/C system maintenance | 48 | $39–$318 |
| HVAC system repair | 42 | $145–$618 |
| Heating system maintenance | 31 | $37–$317 |
| Heating system installation | 27 | $1.4k–$2.8k |
| Heating system repair | 17 | $78–$745 |
| Cleaning | 17 | $135–$484 |
| Install AC | 17 | $1.6k–$3.2k |
