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%97+52.9Reliability 24%96+23.3Value 14%100+14.1Replies to reviews 7%100+7.1Experts Score= 97Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.97SCOREZark Heating & Cooling Inc.
Joliet, IL · Grade ALetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20. · #2Position by Experts Score among all companies we track in this category. of 10 boiler installers · 5.0★ from 891 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 Zark Heating & Cooling Inc. for 8 kinds of job.
Zark Heating & Cooling Inc. for a/c system repair
Clear ✕All 45 Google reviews tagged “A/C system repair”
Honest and professional work! They've done a water heater replacement, AC repair, and furnace maintenance for us. Can't recommend them enough! Same great service on 9/10/26, they were able to get our shop AC up and running quickly! Bill was knowledgeable and through. Excellent job again.
They over charge, do not do a good job with their diagnoses, the one guy they kept sending had a condescending attitude. Whatever they did when they installed our very expensive ac unit lead to all sorts of issues they didn’t want to fix then it became a problem for them when we called another company that found the…
They were quick and got it fixed same day. Also appointment very next day 10/10 recommend
I'm so happy I followed a friend's recommendation to try Zark Heating & Cooling for my AC repair. My technician,Zack, was professional, competent, & efficient. Everything was completed to my satisfaction!
I cannot say enough good things about Zark Heating & Cooling. Rob, the owner, personally met us at our business and was involved every step of the way. From the beginning, he and his entire crew were extremely responsive, punctual, and professional. Our business was in a very difficult situation, and Zark came in,…
I couldn’t be more pleased with the installation of our new furnace and a/c unit. Zark Heating was absolutely wonderful to work with. Very responsive to my questions and their communication with me was outstanding!!! Dan was always very responsive and informative, no matter how busy he was. It is such a relief to…
5 ⭐️ service from beginning to end. We had 4 different quotes for an AC/Furnace and water heater replacement and Zark provided the best price along with warranty and professionalism that makes a stressful situation feel so much better. We worked with Bill, Rob and Zach and they made sure my wife and I felt…
We've been using Zark Heating & Cooling for our primary residence and rental property for multiple years. They provide professional, quality, and timely service at affordable prices. I'd highly recommend signing up for their maintenance plan which will keep your HVAC equipment running smoothly! (A few times…
I have had bad experiences with HVAC companies in the past. I looked in our towns Facebook group for recommendations when our A/C was not cooling. 80% of the people recommended Zark so I called them.They were out the next day, on time and fixed my issue! Zach the technician even tweaked a few other things that the…
This company is tops in customer service, timely installation and repair and fair pricing. The labor they provide is highly skilled and very impressive. Don’t bother comparing, they are the BEST!!
Awesome company to do business with. The team at Zark treats you like family and always looks out for your best interest. Recently had a new AC installed and their team did a fantastic job.
Dan and Keith did a great job today. Top quality professional work and they answered all my questions. I highly recommend Zark and I will use them again for all my HVAC needs.
Update: Zark is absolutely the best value around. I am not sure if everyone gets the same great deal we did, but I am sure glad I've used Zark in the past for repairs. Rob and Zach were at my door at 7am and done installing my new furnace and air conditioner by noon. Zark Heating and Cooling was the lowest of 3 bids…
Top notch service and communication. Highly recommend.
Zark Is my family’s Number one company that we turn to for our heating and cooling needs. No matter what they have always been there for us, even if it’s just a response to resolve a quick problem through Facebook messenger! We have used them in the past and will definitely be using them again in the future whenever an issue arises with our aging systems.
Pedro. S from Zark is the best! My AC went out during an extremely hot day, and he provided excellent service and fixed our problem efficiently and quick. He was very respectful, kind, and worked hard to help solve the issue. I would recommend Pedro to anyone needing service from Zark!
Our AC went out with the hottest week of summer coming. I called them before they opened and very nice guy took my call, scheduled a service visit for the same morning and I got my AC fixed. Call them! You won't regret it!
All of our questions were answered, Pedro was professional, courteous, and had our house cooled down in no time. Thank you Pedro and Zark.
Awesome service, honest company! My A/C went out on July 5th. I called Zark and they quickly came out. The unit couldn't be repaired but they did their best to get it working until a replacement could be installed. The replacement day came and it was POURING rain. The Zark technicians worked in the pouring rain…
I have used Zark Heating & Cooling a few times over the last few years. They are always quick to respond. The service is always great and prices are reasonable.
My husband and I have been very happy with this company. We’ve used them for a few years now, and we’ve always been satisfied with their service. One technician in particular has been very helpful. Last time he was out at our house he spent over an hour with us, just answering all of our questions about the heating…
I had a great experience using Zark. They were knowledgeable and honest when it came to my repairs and why it made sense to replace my a/c unit after refilling the coolant didn't work. Price was very fair and significantly less than the major HVAC company in the area.
I've been a customer for many years and can't say enough about the professionalism and quality.
Zark is great to do business with. We use them all the time. Even walked me through a quick fix when I had an issue.
Great to work with. Very professional from start to finish. Excellent communication!! Highly recommend this company.
I've been using Zark for over 15 years and recommend the company all the time. There is no one better.
Thank you so much for your quick response on a very hot day. Keith was great and solved our problem right away. Will definitely contact you when it is time to replace our system.
We had a great experience with Zark today! Dan was a huge help and quickly got our a/c back working!
We have used ZARK every time we have had any HVAC needs. We have also referred them to family and friends. They have never disappointed. They go above and beyond for their customers especially when there is an HVAC problem during severe weather. They are a family owned business who are trustworthy and fair. All around great people who do great work!
My A/C went out last night on a nice humid night out of nowhere.. I Called Zark in the middle of the night to see if they could get it fixed.. To say they were responsive would be an understatement, they woke me up with their reply asking when I'd like them to come.out. I corresponded with Rob the owner, he was so…
Very professional from start to finish. Great communication throughout. They were able to install my AC unit without any issues. They were also very knowledgeable and explained what they were doing throughout the process. They were more than fair in their pricing and I would not hesitate to use them for any of my AC…
Been using Zarks for a few years for my heat and AC. All techs are professional, trustworthy, patient, clean and on time. No job is too small or too big.
I have always been very happy with the service I receive from Zark. Always very friendly and quick to squeeze me in when I have a problem. Danny came out to fix a problem with my furnace. He was very professional and explained everything he did.
I've used Zark for the past few years and have been very happy with each time they either did maintenance or came out to fix something that was broken. The technicians work very cleanly and are super professional. Recommend 100%.
Unreal! These guys are spot on. Great work and flexible. Big shouts to Rob and his crew!
Very professional! Quick response to inquiries. Great service and great rates. Highly recommend Zark.
We have been using Zark Heating and Cooling for the last few years. 100% Happy with their service. Today they put in a new central air, furnace, humidifier and water heater. Dan Leja did a Great job installing everything. I would totally recommend their business.
I paid $440.00 to have coils cleaned and coolant topped off. I was told when I made appointment that service tech would call when available. Never received call. I called twice afterwords to ask questions and nobody returned my call
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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 | 144 | $37–$264 |
| HVAC system repair | 93 | $145–$618 |
| Heating system installation | 75 | $1.4k–$2.8k |
| Install AC | 73 | $1.6k–$3.2k |
| Heating system maintenance | 67 | $37–$317 |
| A/C system maintenance | 66 | $39–$318 |
| Heating system repair | 63 | $78–$745 |
| A/C system repair | 45 | $216–$611 |
