We stock and install Rheem equipment and are a member of the Rheem Team®. At Controlling Systems, we're home comfort professionals.

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We offer free, in-home HVAC estimates at your convenience. Live operators are available 7 days a week to schedule appointments.


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Rheem Financing through GreenSky makes it quick, easy and safe to apply online for your next Denver HVAC project.


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Located in Denver - Controlling Systems has been serving Colorado since 1976. As a premier service contractor we have expertise in providing air conditioning and electrical repair, plumbing services, HVAC and installation solutions. Our primary goal is your Satisfaction! In addition, we also have experience in boiler repair and replacement. We are a professional organization which takes pride in providing comprehensive heating and cooling solutions, no matter the size or scope of the job.

Our technicians are certified by N.A.T.E., Rinnai, OSHA, EPA and we are an Accredited Business of the Denver/Boulder Better Business Bureau. We service all brands and take pride in our work!

Our Experience Shows! Our installations are the best in Denver. Our installers are always guaranteed to be courteous, professional, and clean. You can count on us to get the job done quickly, and much more importantly, correctly, the first time.

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