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    Graham Mechanical

    5.0 (2 reviews)
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    Comfort Class

    Comfort Class

    (12 reviews)

    This company deserves a special rating of ZERO STARS. This job was so horribly botched that you…read morecould not make this up!!! I paid Richard Tattershall's company, Comfort Class (known in many forms as Comfort Class, C&C Air Services, C&C Chimney, etc.) $20,845 to replace 3 aging HVAC units in my home. I signed a contract stating that the installation would take 4 days, and I (like any reasonable person) signed that contract under the assumption that the units would be properly installed. Oh boy was I wrong! Long story short, not only did the installation take significantly longer than contracted (to the tune of 11 days, not 4) people have been in my home *30 times* (yes we are counting) since the "completion" of this installation. 21 (also counting) of them were unit failures, the latest being June 22-28 - yes, during the hottest part of the summer so far, Richard and his company allowed our A/C to be inoperable for 6 days. Read on to find out about the part where I had to go through a ton of hoops to find and then file a claim against this company's insurance. This company completely failed me as a customer, left me with water damage to my home and personal property, and ALL THREE *NEW* furnaces they installed failed multiple times within the first month of their operation and continued to fail as far as 9 months afterward, so far. As of this writing the most recent failure was less than two weeks ago. How exactly did this company fail us? Let's make an incomplete list: - Installation went so poorly that before it was even finished, an employee quit the company and came to my home with CO detectors warning me not to use the furnaces due to the risk of CO poisoning - Did not convert the units from gas to propane until 1 1/2 weeks after the install and after all 3 units had been running - Failed twice to seal a hole in the house left by a pipe C&C removed, leading to thousands of dollars in water damage the company attempted to ghost us over instead of making an insurance claim - 7+ failures within 1 1/2 months, ~21 total failures out as far as 9 months - After one failure, Dale & Lee's service came and inspected the units and gave me a pink slip (see the pink photo) warning me against running the units until they were inspected/repaired - the second HVAC professional to warn me of CO poisoning if I use these units! - Totally botched install: a double "P" trap, pipes left unglued, zip-tied drain lines, improper wiring, an unlevel unit held up by straps and PVC pipe (that one had about a 25% airflow restriction initially) - Install began on Nov. 11th, we paid for the "completed" job on Nov. 22, last furnace failure was 1 week before we turned them off for the spring - We had to have a lawyer send them a demand letter to get one of our failed units fixed after the company ghosted us in the middle of the winter right after they found out how much the water damage would cost to rectify Through this terrible process, this company has established a pattern of incompetence from the bottom all the way to the top, and a complete abdication of responsibility when faced with the expense of their mistakes. Richard promised refunds multiple times, which I never received. They promised a resolution to my property damage, which I never received either. To finally be compensated for the property damage, I had to contact the Oklahoma Construction Industries board, obtain a copy of this company's Certificate of Insurance, and call them and submit a claim myself. For anyone wondering, the insurance company accepted and paid the claim. The icing on this cake is the most recent failure we experienced. When our units failed on June 22nd, C&C sent ASAP Heating and Air to fix it. The ASAP rep took one look at our failed unit and told us he would not touch it. After taking pictures and talking to his superiors, he notified us that his company would not be willing to take on the liability of the poorly-installed unit, saying that it needed to be completely reinstalled (see the ASAP invoice photo). Richard lied to make the sale, saying the units they were installing in our home were the "same exact ones" they trained on. In reality, he sold us units his company had never installed, and we didn't find that out until after the install began. They made us pay for their training, left us with damage to our home and our personal property, and refused to answer our calls when one of our units failed yet again. TL;DR: We paid for a proper 4-day install of brand new units. We got an 11-day install, 21 unit failures in the 9 months since, an insurance payout we initiated ourselves for water damage, and proof that our units still are not properly installed. Oh, and accusations of wrongdoing on our part. This has by far been the worst experience I have had with any company, ever, and it just keeps getting worse! I would not recommend them, even to someone I dislike. You've been warned!

    After my negative post over the weekend, I received a call from the owner today. We discussed my…read moreissues and he was very apologetic and refunded my money. If i have future issues with my gas fireplace, I will definitely give them a call. This is a small locally owned business. I'm convinced they really want to provide good service to their customers but at times thing drop through the cracks as they get busy. I wish I had tried harder to connect with the owner before making my post.

    Airco Service

    Airco Service

    (115 reviews)

    East Tulsa

    I just had a new HVAC unit installed today in conjunction with their Costco deal - as of this…read moreevening it is blowing cold air and they didn't put my old thermostat back on - when I called the 24 hr line it was a less than reassuring experience...I got sucked in by the chance to finance the unit instead of having my dependable guy do the same unit but paying in full ....so far I'm not happy &&&&&&&&&&&&&&&&&&&&&&&& I sent emails and texts to all I had spoken to and this am a tech came out and after opening the service panel found a couple things that should have been addressed I assume at install....he stayed to make sure that system was actually blowing warm air which is appreciated....I am changing stars but honestly will be on guard as I am concerned by the plethora of other less than complimentary reviews....it is obvious though I have no problem updating my review

    Paid 7,400.00 to have furnace replaced. Techs did not tape the manual to the unit, so our city…read moreinspection failed. Have contacted them twice to get this rectified, and they could not care less. Do not pay them in full until you pass the inspection. After reading they were purchased by Mullin, their lack of customer service now makes sense. Had I known that they were owned by Mullin, I would have called anyone else. I will continue to call every week until we pass inspection. I will have them do the fall check and move on to someone else. The longer it takes them to rectify, the lower their rating will get. April 2026 - Rene M

    Graham Mechanical - hvac - Updated May 2026

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