Combined Services HVAC

My name is David Johnston and I am the proud owner of Combined Services HVAC. I have had the opportunity to work in the HVAC industry for over 30 years. In 2009, I decided to open my own company with a few of the most experienced and talented people that I have known in the industry. We use our collective experience to provide our clients with quality products at a completive price. Since the beginning, Combined Services has focused primarily on the Residential HVAC business. From heating and cooling a multi-million dollar home to a small condo, we have been providing the very best engineered systems around. Since 2009 we have grown into the HVAC Company that can tackle any project. Whether it is residential, commercial or industrial we are the only HVAC Company you will need. If you are looking for service, system replacement or a complete home duct system, we are the experts for you. I will work hard to earn your trust and business. I look forward to working with you.

My name is David Johnston and I am the proud owner of Combined Services HVAC. I have had the opportunity to work in the HVAC industry for over 30 years. In 2009, I decided to open my own company with a few of the most experienced and talented people that I have known in the industry. We use our collective experience to provide our clients with quality products at a completive price. Since the beginning, Combined Services has focused primarily on the Residential HVAC business. From heating and cooling a multi-million dollar home to a small condo, we have been providing the very best engineered systems around. Since 2009 we have grown into the HVAC Company that can tackle any project. Whether it is residential, commercial or industrial we are the only HVAC Company you will need. If you are looking for service, system replacement or a complete home duct system, we are the experts for you. I will work hard to earn your trust and business. I look forward to working with you.

9 Reviews

Client Reviews

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    I'm very happy with the prompt and excellent service you have provided me thus far. Keep up the good work! Thank You, Hiram

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    Wanted to let David Johnston know what a pleasant experience we had with one of his employees who did some work for us yesterday. Trey was polite and was a very high quality worker. Thank you for sending Trey to us.

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    Recently had Combined Services replace my 30yr old AC and 20yr old furnace. The price was great and the workmanship was excellent. Everything was installed quickly with no mess left afterwards. Due to the age of my house, it was a particularly challenging install but it didn’t faze them. Matt, Brian, & the rest were great to work with and I would recommend them to anyone looking to replace their HVAC equipment.

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    We've had Combined Services to our place twice now and both times they were quick to respond, courteous and gave a more than fair price. I highly recommend you use them for any of your HVAC needs.

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    From the minute I called the customer service was great! Friendly, helpful and willing to help! We will definitely be using them again!

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    Timely, Thorough, Professional,Great Customer Service, One of the best I've dealt with.

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    we were referred by friends when we moved to Mchenry and David and his staff are just awesome. They gave us solid fact based advice for our situation and the prices are more than fair ! All my Hvac recommendations are going to Combined Services !! They are honest , helpful, professional and personable ! Very Happy !!

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    Everything was absolutely perfect. Fast, friendly and very professional. I would highly recommend this company to anyone.

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    I had Brian from Combined service my equipment and install Wi-Fi thermostats. Very professional job and everything works great.