For over three decades Knight Air Conditioning and Heating Company has delivered prompt, professional heating and air conditioning service to the neighborhoods of northeast metropolitan Atlanta. We are a privately owned company, totally focused on and dedicated to the heating and air conditioning needs of home and business owners in our service area. Knight Air Conditioning and Heating Company provides Service for Residential and Commercial Systems, Residential and Commercial Systems for new construction, Replacement Residential and Commercial Systems, HVAC system accessories; humidifiers, air cleaners, programmable thermostats and zoning systems and Redesign and replacement of problem duct systems.