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 40
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.
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.
Job for Helen Vaia in New Lenox - Your technicians Alex, Luis and Zach were awesome! Very clean & professional job!
From Bill, the man that came to my house to measure everything, to Rob, who provided the estimate and all the guys that were here during the installation of my air/furnace and hot water heater - they were all so professional, knowledgeable and nice. Kristy was amazing at getting all the last minute paperwork to…
I honestly cannot say enough about Zark. They were here ahead of time however they did wait until the appointment time to ring the doorbell which I extremely appreciate. They were shoe covers and placed drop cloths down from the front door down to my basement. Everything was extremely clean and organized and very…
From beginning to end, five star company!
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.
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.
Excellent customer service, quality work & product! I would use Zark again in a heartbeat! Can’t say 1 negative thing.
Zark was great! I needed new AC and furnace. A tech was here within days, quote was received quickly and I was able to schedule for a time/date that was MY choice. I got several other quotes.....and even scheduling them was tiresome. This company was priced RIGHT!, professional and a pleasure to do business with.
We couldn’t be happier with the service we received when we needed to have our AC replaced. Definitely will use them again if needed.
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…
Very impressed with Zark’s team that they sent out. Dan who was the lead installer took his time on installing the new furnace and A/C system and everything came out looking great and professional. Great experience. Highly recommend!
From start to finish, Zark was great to work with on getting a new HVAC system and water heater. Bill Jacobs was patient and thorough in answering our questions. Rob Bogda was great in setting up a quick install. We especially appreciated the advice, thoroughness and care that Dan Leja provided when doing our installation. His work was outstanding!
Prompt in communication and availability, professional and fairly priced. I found Zark on a town Facebook page and decided to go with them based on being highly recommended by many people. Definitely will be using them again in the future.
Zark did an excellent job at the best price around of installing a new a/c unit! The crew was on time and finished earlier than expected. Rob was very responsive to questions and accommodating about pricing. The job was done neatly and effectively. Only negative (which wasn’t Zark’s fault) was our inability to…
Hands down the best heating and cooling company around. Everything was handled with professionalism and in a very timely manner. Won’t use anyone else for my heating and cooling.
Very professional, thank you Dan and Keith. They did a great job. Everything was perfect. I would recommend them to everyone. Thank you.
Zark Heating and Cooling installed a new furnace, new A/C system and a tankless hot water heater. The job was done flawlessly and professionally! I highly recommend Zark!
We’re happy with our new HVAC system. Our old unit was 30 years old and not keeping the full house cool too well. It was a full day install and the crew were great and walked us through the new system. Will use Zark again.
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 |
