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 heating system installation
Clear ✕All 75 Google reviews tagged “Heating system installation” · showing 60
The guys were here just before 7 o’clock as I said, and went to work quickly. They worked continuously to install both units and an air filter and humidifier and now I’m sitting in a nice warm house again. Rob said if I have any problems with it to let him know, fingers crossed I don’t have any. Rob, Zach and…
Wess did a great job for us. He was on time, very honest and got the job done in 1 day. Very knowledgeable and a good teacher for his partner Conner who was very helpful explaining the new thermostat. Thank-you Wess and Connor.
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…
They are very professional. Quality work and equipment. They clean up nicely when done. I will recommend them to everyone.
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…
Can’t praise Zark enough. We just had them complete a new furnace install with some air quality additions. The team was incredibly responsive when we had issues, and were working through the replacement decision. Zark’s pricing was very competitive, and our lead tech, Zach, presented us with a few options, and Rob…
They were there when they said they would be. explained everything to me A good experience. Very polite. I felt it was a very reasonable price compared to other places.
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.
Great experience, technician Bill explained everything very well. Great for the 1st visit I will definitely recommend Zark heating and cooling. Rob installed my combo heat and a/c Units very happy with my new installation.
The service was outstanding and the total price was much less than their competitors! I would highly recommend Zark for professional and friendly service. They are truly a family run and owned business!
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.
Very professional. Punctual. Very comparable pricing. Great service. I would recommend them to anyone!
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
Outstanding service. Dan was very professional and we are very satisfied with the work. I would highly recommend them to everyone.
We contacted Zark to replace our furnace. We had done previous business with them at our home in Manhattan. Once again they proved themselves to be professional and knowledgeable. Our new home had the original furnace and Zark service technicians gave us several options, allowing to make an informed choice. Our new…
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…
Great experience with Zark Heating & Cooling! We installed a new furnace a few years back which was very reasonably priced and Zark installation was timely and professional. Recently called for an issue and they sent someone the next day. Minor issue and they actually told my husband what needed to be fixed and he fixed it himself saving us $.
I've been a customer for many years and can't say enough about the professionalism and quality.
Zark HVAC is a very honorable and professional service provider. I would highly recommend using them.
Excellent customer service, quality work & product! I would use Zark again in a heartbeat! Can’t say 1 negative thing.
Rob and Bill took care of everything. I was amazed by the service. Zark showed a quality of days gone by. There was no high pressure sales to deal with. They worked with me to meet my needs and I felt understood. They made me feel respected. I felt my home was respected as well.
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.
Excellent service from the get go. Called that our heat was out and Kristy scheduled service right away. She was so friendly and attentive to my problem. The service guys, Alex and Bill were amazing. Very knowledgeable and immediately knew the problem. They explained everything. A new furnace was needed and Rob, the…
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.
We woke up to a cold house Saturday morning and called Zark Heating and Cooling. Rob contacted us quickly and set up an appointment within hours of our initial conversation. Rob quickly diagnosed the issue and provided us with fair priced quotes for a new furnace to get us back up and running. Rob was professional,…
I texted Rob at 1:30 this morning in tears, not only did he text me back at 5:30am he was patient with me while I rambled off what I thought was wrong with our furnace. I have three young children so I was obviously quite upset. Rob told me he would be out as soon as possible. After Rob arrived at our house he…
I had both my heating and cooling systems replaced. I felt comfortable knowing the company stands behind the products and services them. Dan lead the team of professionals and answered all of my questions, taught me; about the heating systems parts, and, how to use the new thermostats, cleaned the area where he…
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…
Extremely fast service called a Thursday morning and Dan L was out Thursday afternoon. Dan was very knowledgeable and gave great advice which helped me to choose a new furnace system. Less than a week later the new furnace was installed and Dan was timely and did great work! Really good experience with Rob who helped with the financing process too!
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!
We had a new furnace and air conditioner installed by Zark. We worked with Dan Leja. He was knowledgeable, professional and took time to explain everything thoroughly. We highly recommend this company.
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!
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.
Great people to do business with. One of our heating units failed and Zark was out the next day replacing it with a high efficiency system. Their workmen were courteous and prompt, their work was exemplary and they left our house clean after they had finished. Could not be happier with the value of their work. Honest and reliable!
I had to have a new hot water furnace installed. The price was great and I can’t say enough good things about the installers Dan and Brian, just fantastic. I would highly recommend this company. Pricing, workmanship, a very good experience.
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!
Zark replaced our boiler that was 50+ years old. They were prompt courteous and professional. I will definitely be using them for all of our HVAC services from now on.
I highly recommend Zark and I will use them again for all my HVAC needs.
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.
I have used Zark time and time again! Professional, courteous, on time, and explains everything they are doing. Dan and his teammate did an awesome job installing my garage heater. I had a couple of requests regarding the install and they did everything I had asked. Keep up the great work Zark! You won't be dissapointed when using this company!
I took a chance with this company and I am so very glad I did. Every single person from Rob the owner, Kristy the office manager and Dan/Brian the technicians have been so polite and professional. I am so impressed with all of them. I did not know a company in 2021 still existed that was not all about the money and…
We very suddenly needed our furnace and air replaced this week and everyone was so incredibly nice and responsive. 100% would recommend to use this company. Professional, very responsive and timely, and friendly!
Rob and the team at Zark are the best! After getting quotes from 5 other vendors not only did they give me the best bang for my buck but were also responsive via phone, email, and text to answer all my questions, even after hours. Zark is honest, upfront, and isn't there to upsell you like many others do. They gave…
Rob and his team are outstanding. We were in need of immediate replacement of our furnace and they were able to supply a new unit and install same day! Not only was the service great but the price was very reasonable. Also used Zark for installing a new humidifier and AC unit relocation. (Both Dan and Keith are very…
ZARK is a great company to work with! They were professional and had the best quote. The quality of work is exceptional and they took the time to explain how everything works. I highly recommend ZARK for your HVAC needs!
Dan and Keith came out to replace our AC and Furnace, and did an EXCELLENT job. They were professional, did a clean job, and were friendly as I poked in multiple times to see their progress. Most definitely exceeded our expectations. Once they were done they explained everything about the new units and tips to…
Dan and his crew were outstanding. On time, professional, gave us all of the information that we needed to know, got the job done efficiently and in a timely manner, cleaned up after themselves and very personable. I will be using Zark as our main heating/cooling company from now on and will recommend them to anyone…
Installed both a new heating system and a new hot water heater. They were early for the appointment and finished In less time than I was told. Everything was explained to me and they made sure I had no questions before they left. I highly recommend Zark.
I cannot thank Dan and Zark Heating and Air for coming out immediately to my residence due to no heat and immediately diagnosing the problem and getting us a solution. I highly recommend!
Very professional! Quick response to inquiries. Great service and great rates. Highly recommend Zark.
I would highly recommend them. I had no heat, called them, they came out next day with a price for a new unit and the next morning installed it. Nice people and best of all no problems with anything which is definitely a pleasant surprise nowadays. Great business, people, price, service!
I am very impressed with my new furnace and I am especially very impressed with Dan the young man who installed it, he was very informative and when I have to replace my air conditioner I will most definitely call you back. I want Dan for all my service calls.
Zark was fantastic. Got the job done right away!
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 |
