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 install AC
Clear ✕All 73 Google reviews tagged “Install AC” · showing 20
They arrived on time they checked my furnace found a slight problem said they would order the part. All is good. When I called they scheduled a date to replace the inducer. Now installed
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.
PHENOMENAL CUSTOMER SERVICE & JOB WELL DONE!! Rob & company were extremely prompt to respond to my emails, texts & calls even on a Sunday!!! I would HIGHLY recommend Zark Heating & Cooling for all your HVAC needs!!! We utilized their services after Rob was able to send me a quote almost immediately after sending…
Zark was recommended to me by a relative when my air conditioner wasn’t working. They came out the next day. Unfortunately my 30 yr old unit was not worth fixing. They were not pushy at all in selling you another. They sent an email with the price list with several options depending on what you want to spend. They…
They are very professional. Quality work and equipment. They clean up nicely when done. I will recommend them to everyone.
Zark is the best! For several years now since moving to Manhattan Zark HVAC has been servicing my heating and AC systems with ease and care. Family owned and operated, knowledgeable, reliable technicians. Easy, honest communication and fast reliable service. My new AC works beautifully and I’m all set with…
The technician was outstanding and very professional
Very quick to get out, super friendly, and great prices
ZARK HVAC was excellent. Extremely professional, friendly and did excellent work. Highly recommend them!
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…
Been using Zark for the last couple of years for routine maintenance. The time came to have to replace the furnace and AC, and there was no other choice for me. Zark is an exceptional company! They hit high marks in every area. They care about their customers, offer great pricing, and their customer service is…
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…
1/7/26 Update: still a fantastic company to work with! I always recommend Zark Zark has become our Go-To for all HVAC needs. Our very first experience with them, came when our AC went out, during the hottest weekend of the year. They were prompt to come out and significantly competitive to other, well…
Great customer service, very friendly and easy to work with. They did a fantastic job with the installation of our A/C and furnace. We would definitely recommend Zark! Thank you.
I’ve been using Zark since I moved to the area. They are reasonably priced , do clean work, and honest. I won’t use anyone else.
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.
I have used Zark Heating and Cooling multiple times. They have always been professional, provide high quality work and they stand behind all that they do. I would not use anyone else but Zark for all my HVAC needs. I would highly recommend Zark to anyone looking for a fair price, quality work and prompt, friendly service.
I was introduced to the owner through a client and have been using and recommending Zark Heating & Cooling for years. They've always been very responsive and honest. I never feel like I'm being upsold.
Top notch service and communication. Highly recommend.
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 |
