Due to unexpected circumstances we lost my father-in-law who knew everything about anything recently. With your world still spinning from that you forget about day to day life. My mother-in-law in a panic yesterday explained she doesn't know how to work their boiler! Don't get me wrong YouTube can put people through college but with both of her sons working the next day and me not wanting to start a fire I called Zark's. Everyone in Manhattan always suggest them I figured what do I have to lose, they work on older houses?! Omg the SWEETEST AND INCREDIBLY NICE lady named Nicole, answered the phone. She was giving me different dates (a week or so out which I expected) and then she stop and said, "Wait let me see what I can do..I'll call you back." Not even long enough to call my husband back to tell him, she called. "Can you be there today? I have a technician!" (And the angels came down and sang a song) "Of course!!" She made it happen and she sent the nicest man named Bill out. He was so patient with my mother-in-law (who was in and out of tears upset she didn't pay attention all the other times) and myself. He helped me label the pipes even let me take a video because sometimes I forget lol. He must of ask a handful of times is there anything else? Even gave us some things to watch out for and trouble shoot. I honestly could not be so thankful for this company! Nicole being human and compassionate and Bill explaining things making us both feel confident. The value of service they gave is unmatched and I can't thank them enough!! read more

Our 75 gallon hot water heater, 13 years old, was leaking in the basement. We drained it so it wouldn't flood overnight and the next morning started the task of looking for a plumber. Another problem was that our heater was attached to the radiant heat for the basement floor. We were told by plumbers to look for a heating company that knew about boilers...a pretty specialized task. I searched for "boiler heat" on Facebook and found Zark, which had 81, 5-star reviews. We called at 11am and Rob asked us to take pics of our setup so he could get a better idea of our special issues. Rob said he could come over at 3pm and that we'd have hot water by the end of the day. I can't say enough about our experience with our new water heater and hook-up to our radiant heat...Rob was prompt, professional, knowledgeable, fast (he was out the door by 5:45) and Zark HVAC was (fortunately) affordable on top of all that. Rob is also a really friendly, nice guy who even accommodated my 9 year old nephew who brought down his new toolbox after school to "show the guy" his tools. We will definitely be calling Zark again for HVAC. read more

It was 7:45 p.m. Saturday night, 17 hours before my daughter's baby shower and my house was 65° and dropping. I contacted Zark who graciously did a little bit of troubleshooting through text first. He soon realized it was most likely a dirty flame sensor and came to the house. The problem was diagnosed and fixed within 30 minutes. What should have been approximately $400 for an emergency visit, weekend visit, and repair was only $255. They allowed me to sign up for their maintenance plan and receive the benefits immediately. With the plan I will also get a furnace cleaning now and an air conditioner cleaning in the spring. The temperature was about 10° and the next day's forecast was -11°. So instead of finding a place for my daughter, my cats, and me to stay, packing everything up to get ready for the shower, packing up the food and gifts, I was able to stay in my nice warm toasty home thanks to Zark! read more

On Saturday May 9, 2026 I wanted to take a moment to recognize your exceptional efforts in going above and beyond my expectations. Your employee, was one of the most honest, dedicated individuals I have ever come across. His hard work should not go unnoticed, and his dedication to the company. I thought when I first called you, I would need a new air conditioning unit. But instead your employee cleaned, replaced a part and rewrapped my cable connected to my home. He could of told me I needed a new ac unit, but he stated that's not what was needed. As a home owner we constantly hear of scams, especially to senior citzens. I will definitely be a returning customer for my heating/air conditioning needs! I will definitely will refer your company to anyone who asks or looking. Rita G read more

Zark Heating and Cooling exceeded my expectations! From start to finish, the experience was outstanding. Zack arrived right on time, was friendly, professional, and incredibly knowledgeable. He took the time to thoroughly inspect everything, quickly identified the issue, and explained the problem and solution in a way that was easy to understand. His attention to detail and commitment to excellent customer service truly stood out. It's hard to find honest, dependable service these days, and Zack delivered exactly that. I highly recommend Zark Heating and Cooling to anyone looking for reliable, high-quality HVAC service. I'll definitely be calling them again for any future heating and cooling needs! read more

Zark Heating & Cooling is a fantastic company that I highly recommend. Rob and his crew are trustworthy guys who are always looking for a way to save you some $, while making sure they give you what you need. We have used them for few years and I recommend them to everyone looking for an HVAC company. Today they installed a new AC for us after triaging our old unit for two years. Rob recommended a few units for us to consider but actually said the less expensive unit was our best choice. They installed it quickly, cleaned up after themselves and then took the time to walk me through everything they had done. You can't go wrong here...a local company doing a great job with a smile. Call them today. read more

From start to finish the Zark team did an outstanding job. I wasn't able to be present for the initial quote, so Bill met with my wife to go over the services they provide and what we can expect in regard to price. My wife was so impressed how he treated her and talked to her like an actual person. I knew I wanted to work with them and I'm so glad I did. Rob and Zach came out and they replaced our old AC/Furnace as well as a water heater and they were extremely professional. They arrived early, discussed the process with me and did an excellent job. I would definitely recommend Zark for any HVAC needs. read more

I was getting quotes to replace my furnace in my home. When I called ZARK they were priced reasonably and came to give me a quote same day! I decided to go ahead with the service after looking at there client reviews and experience with the company. They scheduled me in and showed up right on time everything was a same-day job and before they left, they even cleaned up after themselves and asked if I needed anything else checked while they were there. When it comes to choosing an HVAC company, I will certainly choose ZARK heating and cooling all day every day and twice on Sundays. read more

Once again, Zark came through for me! Rob and Zack arrived quickly and got my water heater back up and running after I lost power over the weekend. I wasn't sure how to restart it, but Zach took the time to show me exactly what to do if it happens again. They were just as friendly and professional as they were when they installed my HVAC system. Everything -- the air conditioner, furnace, and water heater -- are all still working great. I really appreciate their fast, reliable service! I'm so glad I decided on Zark to install my HVAC system. read more

My A/C went out last night out of nowhere. I called Zark in the middle of the night to get someone out here asap. Rob, the owner promptly got back to me in the early morning, actually he woke me up lol. His customer service is second to none and Bill the technician, my goodness, he went above and beyond to get things squared away in 30 mins! He basically diagnosed the problem in seconds and had it fixed in minutes. I cannot recommend a company, customer service or quality technician such as Bill more. Amazing job!! 10 stars out of 5!! read more

This is one of the best companies I have ever witnessed! These guys are kind, courteous, respectful, and professional! Zark is top notch in my book. I would recommend them to the world the wife and I love these folks. Please give these guys a chance you won't regret it. It's a good company. Appreciate the kindness guys the professionalism, and the respect for my home as well thank you and keep up the good work. I wanna thank you on the behalf of my wife, Tina Thomas and myself Matthew Thomas thank you guys read more

My heat went out and Zark was prompt to respond. They were extremely professional, thorough, and have great pricing. I have had various problems with my HVAC over the years and numerous repair men out to assess. Zark were the first ones to actually identify the problem. They gave me various options to fix and/or replace. I decided to have them replace it as well as add a humidifier and I couldn't be happier. I was referred to them from various neighbors that have also had similar experiences. read more

We had a wonderful experience. Unfortunately our furnace stopped working on one of the coldest days of the year- and on a Sunday. We have a large family and little children. We called Zark. Bill came out and was able to diagnose the problem. He had to go back to the office for parts but still retuned that same day to fix our furnace. He explained everything that needed to be done and answered all of our questions. Best of all we have heat! It was done at a reasonable price. Thank you read more

Zark heating and cooling is by far the best HVAC company you will find. Rob and his team have been there for me during the coldest days as well as the hottest. They just replaced my A/c system and it works so much more efficiently than my previous system. They are super friendly and work quickly. My house was cool within 2 hours of their arrival!! Their prices are extremely fair and equipment is state of the art. I would recommend ZARK to everyone and anyone! read more

Super friendly service. Very fast and responsive. Our furnace blower motor went out on what is to be the one of the hottest and most humid weekends yet. Zark was very upfront about fees, arrived to appointment ahead of schedule after calling to confirm it would be ok to do so, explained the issue and replaced the part immediately with part in stock on his truck. Than you Zark! read more

Zark Heating & Cooling is great! This is the 2nd time we have had an issue with our AC Unit this season & both times we have had Bill and he is GREAT! Explains what is wrong & gives you great pointers as to how to keep the unit going! I DEFINITELY recommend to call Zark's for all your heating & cooling needs! Their service & the way they treat their customers is EXCELLENT!! read more

Couldn't be happier with this company. Had Rob out for a quote on Tuesday for a new furnace that we knew was about to go out. Unfortunately that night it happened. I called Rob the next morning. He had his guys to my house by 3:00pm. By 5:00pm we had heat!!! Very professional. Explained everything to us. And all at a great price! Thank you for keeping us warm! read more

New A/C and furnace installed at an excellent price. Installation went quickly and left the area spotless. Don't waste your time shopping around in this area for new HVAC systems or the repair of old ones. Simply call ZarK HVAC. You won't go wrong. Five out of five stars. Couldn't be more pleased with the price and service!! Jim S. Manhattan, Illinois read more

Some of the best hvac people that I have dealt with. Zach was out at our house a few months ago to do maintenance on our furnace and he was very professional and answered all questions that I have had. Have been using them since we moved into our house and will continue to use them! Rob and his crew are the best! Keep up the good work! read more