TSS facilities 21 - REDUCE YOUR HEATING BILLS HOW DO AIR SOURCE HEAT PUMPS WORK? 4. The air source system heats everything from your radiators, underfloor heating, shower and taps. 1. Heat is drawn from the air outside, compressed and distributed to the hydrobox. 2. The Hydrobox transfers the heat to your central Heating system. 3. The air source heat pump heats up your hot water cylinder. The system installed may vary from that in the example, an onsite visit will be needed to determine the right system suitable for your home. TSS facilities 21 - REDUCE YOUR HEATING BILLS HOW DO AIR SOURCE HEAT PUMPS WORK? 4. The air source system heats everything from your radiators, underfloor heating, shower and taps. 1. Heat is drawn from the air outside, compressed and distributed to the hydrobox. 2. The Hydrobox transfers the heat to your central Heating system. 3. The air source heat pump heats up your hot water cylinder. The system installed may vary from that in the example, an onsite visit will be needed to determine the right system suitable for your home.