Ford & Doonan specialise in refrigerated ducted air conditioning (reverse cycle). This means our systems give complete climate control which is perfect for both cooling and heating Perth homes. With 30 years of experience, we are the ducted air conditioning Perth specialists to go to. Refrigerated air conditioning is connected to ducts which distribute cool or warm air to multiple rooms or spaces. Refrigerated ducted air conditioning can range in size from 2.5kW (1.0hp) to 200kW (80hp) depending on your requirements.