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 20
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.
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 |
