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 maintenance
Clear ✕All 66 Google reviews tagged “A/C system maintenance” · showing 60
Pedro was courteous and explained all maintenance procedures/processes that were completed. I felt confident that I was in good hands. I am always confident that Zark is keeping my HVAC running smoothly.
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 are very professional. Quality work and equipment. They clean up nicely when done. I will recommend them to everyone.
Again, A very satisfied customer here! Thank you, Bill J. for another great appointment, top notch customer service and valuable advice. I really appreciate the booties. I wish every company have their employees wear booties when entering a customer's home. It's common courtesy.
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…
Big thanks to Zark heating & Cooling! Replaced the A Coil and got our A/C up and running! So appreciate the fast and professional service! Your maintenance program is the best, always on top of problems!! Highly recommend Zark Heating and Cooling Inc...They are there when you need them!
Zark is the only HVAC company I use. The service and friendly personnel keep me as a satisfied customer. Having their annual maintenance contract gives me peace of mind.
We woke up this morning - February 6th - and we had no heat. I called several HVAC companies but all were on vm. I looked on the internet and found ZARK. I called and got Christy on the line. She said she could have a serviceman out within the hour and quoted a price of $129.00 because it was Saturday but said…
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…
We have been using Zark for the last couple years. They are the best.
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!!
Rob and his men have been keeping my 50+ A/C unit running and have never tried to sell me a new one. They see pride in keeping this one running efficiently! They are trustworthy, dependable and their pricing is fair and they have a good service contract.
Detailed, friendly, punctual and Zark presents high quality units at affordable prices. What more can we ask for?
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.
Very good on services.
Honest, fair and fast. Can’t ask for much more. My go-to HVAC company for business and residential.
If you want top notch service, then call Zark. Professional, efficient and reasonable.
Zark is reliable, efficient, honest and trustworthy and friendly. We have always received top notch service from them. Recommend them 100%.
Just had my fall furnace tune up. Alex did a terrific job. He was friendly, polite and very efficient. Being on Zark's maintenance plan really saves money too! 2 more years of great service as of April 2024. They're the best around
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!
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.
Rob and crew were prompt and professional
We've been using Zark for a few years now and we are so glad we switched. Professional employees who treat you with respect.
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.
Always great service in a timely manner. Everything from maintenance, emergencies to new duct work. Zark has done it all for us and we’ve always been pleased!
I've been using Zark for over 15 years and recommend the company all the time. There is no one better.
We use Zark at our home and office. They are always friend and do great work! They have done many different things, from installing a hot water heater to put in a house humidifier.
We first used Zark in Gardner for a furnace tune-up and vent repair. It's an old house and had some special challenges, but they handled it all like a champ. Then we signed up for the annual maintenance plan to have regular checkups for the furnace and A/C. Each technician who came out to the house was…
Rob also installed a new hot water tank and disposed the old one for me...First class company from top to bottom...Very fair pricing...Zark is and will be my only heating repair company...Rob is an awesome person to do business with...
Zark Heating and Cooling has maintained my furnace and AC for a number of years and have been able to update my water heater when it started to leak. By handling my furnace maintenance they were able to foresee when I was in need of a new furnace and humidifier. I recommend them to my family and friends. Their associates are friendly and knowledgeable.
Always on time. Honest, reliable service. And their phone response is friendly and always willing to work with your schedule. Highly recommend!
Zark is a very dependable, affordable, prompt and supportive Heating and A/C service provider. They replaced our outside unit , did maintenance on new unit, and trouble shot wiring/ thermostat issues. The scheduling was timely, they worked around my schedule, and they gave upfront and affordable quotes for all…
Zark is fantastic! We are always very satisfied with our service from them. Dan was out yesterday to check on an issue with our furnace and we were so happy with the work he provided. We ended up needing a new furnace, and they were able to get us in the next day. Everything today with the install went great and was…
Was able to schedule a very reasonable service time. Their representative/technician called prior to arrival which was right on time according to their estimate. He quickly diagnosed the problem and made necessary adjustments. In addition, he checked the outside unit, determined that it was low on Freon and…
Keith was phenomenal. He educated us on the issue we had with our unit and gave us future tips to keep our house cool. We will always continue to call him with our future heating and cooling issues. You’re the man, Keith!
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!
Not only is rob the owner of the company amazing but his wife Christy who is the manager she takes the calls and makes sure the guys who are going To your house are squared away. As a police officer I trust them to take care of my heating and ac that makes my family comfortable. Great company.
Reliable and professional. Responds promptly and great communication. Highly recommended. Thank you!
Family owned business! Friendly honest business!! Best HVAC company anywhere!!!
Dan solved my problem and was very helpful. He went above and beyond to help me. I will definitely call Dan with Zark whenever I need help with anything with my ac and heating. I was very satisfied.
Very professional and helpful! My AC was on the fritz yet again and they suggested a total replacement due to the amount of repairs already done on the unit. After arriving they worked very quickly and before I knew it my house was chilly as can be again! Absolutely recommend them!
Prompt and professional. I’d call them over and over for all my heating and air concerns. You won’t be disappointed.
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'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%.
Rob, Dan, and the office crew are all top-notch. Always responsive, great troubleshooters, prompt and fast service, and always do great work. The community is fortunate to have Zark here to serve us.
Have used Zark a few times for different services. Fair, honest pricing and good follow-up. Willing to repair instead of rushing to replace. Helped us get a few more years out of our AC unit. Highly recommend, good people to do business with.
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.
Zark was great and helped diagnose what was wrong with our heating quickly. I was glad to see that we only needed a cleaning. Dan was very professional and was gone within an hour and had our house warming up pretty quickly. I signed up to be maintenance client with them to have them come clean my heat and AC unit…
Our AC went out on a very hot weekend. We called them and they came out in just a couple of hours and fixed it . Quick, efficient and reasonably priced. Great job!
Great business that responds quickly and professionally but treats customers like family.
Excellent service, great pricing and friendly people. Been using him for many years after being burned by a large local HVAC vendor.
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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 |
