CLEAN & CHECK To ensure your system is operating at its top efficiency, and safely, have one of our E.P.A. certified and N.A.T.E. trained technicians CLEAN and CHECK your system today. Call the office nearest you to set an appointment. FREE EXTENDED WARRANTY UP TO 10 YEARS PARTS and LABOR. When Sierra installs an American Standard Heating and Air Conditioning System in your home, office or commercial building, you'll have the peace of mind knowing it was installed correctly. So, Amercian Standard backs you with a great warranty. INDOOR AIR QUALITY/SYSTEM DUCT CLEANING   Get your air duct system cleaned.   Air Duct Cleaning can:   Rid your ducts of dirt and debris.   Rid your ducts of mold.   Rid your ducts of pollen.   Rid your ducts of dust mites.   Improve the efficiency of your HVAC system. Call our office nearest you for a quote today! We offer FREE duct system cleaning. When we install a qualifing Heating and Air Conditioning System we will power clean your duct system. We offer all types of air filtration packages. Ultra-Violet Air Purifiers to kill molds, mildew that grow inside your duct and equipment. We also offer Heat Recovery Systems, and Fresh Air Ventilation Systems. Call our office nearest you to speak with an Indoor Air Quality Expert. Request an in home survey and start breathing cleaner and fresher air when we install an Air Purifcation system. QUICK SAVINGS REBATE P.G.& E. and Manufacturers Rebates may be available on qualifing equipment. These Rebates are available on a FIRST COME FIRST SERVED Basis. Call our office nearest you for more information. SAFETY INSPECTIONS Keep your home and family safe with a System Safety Inspection available at a special rate running now. Call our office nearest you for an appointment.