Does the Heat Pump outdoor unit of the Water Heater need to conform to MEPS (Star Rating) standards as required for air conditioners?
Heat Pump Water Heaters are currently not subject to minimum energy performance standards (MEPS) or any form of mandatory government-issued energy rating label. They will eventually be included in the Equipment Energy Efficiency Programme, but for now Heat Pump Water Heaters are a low priority for Government regulation due to their low volume of sales and relatively high efficiency compared to conventional electric and gas storage water heaters.