When assessing different Spring Valley, California HVAC contractors, always look for 3 things: license, membership, and years in service. Spring Valley, California HVAC contractors must have a state license to guarantee you that whoever comes in your home is a legitimate HVAC technician. Also ask if the contractor is a member of Air Conditioning Contractors of America. ACCA members have access to latest technology and information regarding HVAC system. Finally, ask how long the company is in service since length of service equates to consumer trust and expertise. All these can be found in Precision Heating And Air Conditioning, Inc.