1. On The Mark Heating and Air

    1. On The Mark Heating and Air

    0

    Hoffman Estates, IL

    On The Mark Heating and Air

    4.7 (22 reviews)
    Open Open 24 hours

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    4 months ago

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    1 year ago

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    9 months ago

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    Mark P.

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    7 years ago

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    8 years ago

    Mark installed an Aprilaire whole house humidifier. Good work, fair price, very professional. My sinuses thank him! :)

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    8 years ago

    Great job on repairing a furnace at one of my rental property. Great turnaround time at a fair price.

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    8 years ago

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    Review Highlights - On The Mark Heating and Air

    The owner Mark spent time with my wife and I and explained all options for a new central air unit and furnace.

    Mentioned in 2 reviews

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    Went to take a shower at 5 AM and had no hot water. Checked and found out hot water heater pilot…read morewent out for the first time since I purchased it. When it comes to messing with gas in my home I have a no hands policy. I called Green Tech to schedule an appointment and left a VM around 6:15. At 6:45 I got a call back. The tech was calling me from his mobile while driving into the office. He literally walked me through what I had to do. "Have you ever lit a gas BBQ? Same concept." Did as he instructed and BAM, we are back in business. Green Tech could have come out and charged me an hourly, which I was willing to pay for, but instead taught an old man a new skill. This is not the first time they have walked me through an issue, hence why I call them for anything plumbing related. Can't recommend Green Tech enough.

    I can't say enough good things about my experience with Green Tech Plumbing! A can do kind of…read morecompany! I've found it increasingly difficult to find service companies that are knowledgeable in their field, responsive, honest and provide excellent customer service. Not only did Green Tech Plumbing check all these boxes, but they also offer fair pricing. A unicorn of a business. After being overcharged and underwhelmed by our previous plumber, I was on the hunt for a capable plumber to install a whole house water filtration system. From the moment I reached out to Green Tech Plumbing, they were nothing but responsive and helpful. I purchased the filtration system from a vendor, yet Kevin willingly answered all my questions (promptly!) about the system. He even pointed out that one of the options had expensive filters that would need to be changed frequently saving me hundreds of dollars in filters. What a gem! Kevin came out to look at how the system could be installed in our space and talked to me through how the system would work and answered all my questions. He then provided a fair quote. Once our system was delivered, I emailed to set up the installation. His team came out the following week for the installation. The tech Kevin sent was just as helpful! He moved the 100-pound tank from the garage to the basement, which wasn't part of their scope. The tech had to make a run to the hardware store to buy connection pieces that weren't included with system, but he knew exactly what to buy and did so in a timely manner. The install was speedy and flawless. The tech was even willing to stay while I called the vendor's water filtration system customer service expert to walk us through the start up process. On top of this great experience, I wrote a check for the incorrect amount and Kevin responded right away saying he would swing by and drop a check in our mailbox for the overpayment. Unreal! This is how you run a company!

    S and J Plumbing & Sewer - Our new logo!!

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    The service was great from inception to completion. The tech working that installed the toilet was…read moreamazing doing a thorough job and even made sure to clean up under where the toilet was so any lingering scents, grime, bacteria, etc. beneath were gone. In the beginning I was a bit skeptical of a $49 quote fee but the price was right and I did use them so they credited it to the bill. I'm having them come back out to replace the water heater soon. 10 out of 10 and 5 stars.

    I had an extremely frustrating experience trying to schedule service with this plumbing company…read more The biggest issue was how heavily they rely on AI and automated systems instead of providing actual customer service. It was nearly impossible to get straightforward answers or speak with someone who could actually help. On multiple occasions, I was given an appointment window of 8:00 AM to 5:00 PM, forcing me to set aside an entire day waiting for a technician. Then, when 5:00 PM finally came around, I would receive a text saying that all of their technicians were busy and that they wouldn't be making it after all. Expecting customers to waste an entire day waiting, only to cancel at the last minute, is completely unacceptable. If your schedule is full, be honest upfront instead of repeatedly giving appointment windows you can't keep. I understand that unexpected delays happen, but this happened more than once. Good customer service is about communication and respecting your customers' time, and unfortunately this company failed on both counts. I won't be using them again and can't recommend them based on my experience.

    On The Mark Heating and Air - hvac - Updated September 2026

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