Waste-Heat Recovery systems can be adapted to air conditioning systems for

• A. Water heating.
• B. Space heating only.
• C. Refrigerant recovery.
• D. Dehumidification.

Answer: (A)

Waste-heat recovery captures the heat that air conditioning systems reject and puts it to a useful use. In many setups, the hot energy released by the condenser can be transferred through a heat exchanger to heat water. This provides domestic hot water or preheating for building hot-water systems without needing extra fuel or electricity, boosting overall efficiency. Water heating is the most straightforward and practical use of that recovered heat, which is why it’s the best fit here.

Refrigerant recovery is about reclaiming refrigerant during servicing, not energy reuse. Dehumidification and space heating can be related to HVAC, but they aren’t the typical or direct use of waste heat in these systems.