In Phoenix, AZ, summer air conditioning bills can be unforgiving. Do you want a lower air conditioning bill? Having a highly efficient air conditioner is the best way to lower your summer bills. Cool your house off with a great air conditioner, and lower your bill by an average of 30%!! 911 Heating and Cooling is Phoenix’s premiere HVAC service installation and repair. We are proud to offer Carrier, a high quality air conditioning and heating brand. Our services are available valley-wide. Call us today or visit our other pages to find out the services we provide.