We are your local heating, air conditioning, and custom sheet metal fabrication experts in Redding, California. NO JOB TOO BIG or SMALL! Air-O Service is your multi-service heating and cooling specialist serving the north state since 1976. From commercial to residential, we have you covered. For installation service and maintain air-conditioners, heat pumps, furnaces, water heater, geo-thermal and hybrid heat systems, look no further. We also install air cleaning, filtering, exchangers and humidifiers.