[AIVC, Air infiltration and ventilation glossary, 1992]:a statement of the heat input to, and heat loss from, an appliance, plant or structure, intended to account for all sources of heat and equivalent energy.

[AIVC, Air infiltration and ventilation glossary, 1992]:A device designed to transfer heat from two physically separated fluid streams. In buildings, it as generally used to transfer heat from exhaust warm air to incoming cooler outdoor air.

[EN 16147-2017, 3.2]:heat pump space heater that is designed to also provide heat to deliver hot drinking or sanitary water at given temperature levels, quantities and flow rates during given intervals, and is connected to an external supply of drinking … Continue reading →