The QC Guys are a licensed, bonded, and insured Contractor in the Temecula/Murrieta Valley. Serving all of Southern California, including San Diego, Orange, Los Angeles, San Bernardino and Riverside Counties. QC Guys has been installing QuietCool whole house fans for over 13 years (since the beginning of the QuietCool product). There is no one more experienced with QuietCool whole house fans than the QC Guys, guaranteed. We have the lowest install prices, cleanest installs and best customer service around.