Diamond Air is locally owned and operated by a family, just like yours. We have over 20 years experience in the industry and we are committed to making our customers smile. We are experts in Residential and Commercial HVAC throughout Ontario, Irvine, and Arcadia. We offer repair of your Heating and Cooling equipment, replacement of your existing system and maintenance to keep your unit(s) working properly. We will thoroughly explain the diagnosis before we make any installations and/or repairs. We want you to be able to make an informed decision after we present all of your options.