![]() ĬO 2, N 2O and CH 4 are common greenhouse gases and CO 2 is the largest contributor to climate change. Heat recovery systems typically recover about 60–95% of the heat in exhaust air and have significantly improved the energy efficiency of buildings. Building exhaust air is used as either a heat source or heat sink depending on the climate conditions, time of year and requirements of the building. A typical heat recovery system in buildings consists of a core unit, channels for fresh air and exhaust air, and blower fans. By recovering the residual heat in the exhaust gas, the fresh air introduced into the air conditioning system is pre-heated (pre-cooled), and the fresh air enthalpy is increased (reduced) before the fresh air enters the room or the air cooler of the air conditioning unit performs heat and moisture treatment. Heat recovery is a method which is increasingly used to reduce the heating and cooling demands ( and thus energy costs ) of buildings. ![]() Heat recovery ventilation ( HRV), also known as mechanical ventilation heat recovery ( MVHR), is an energy recoveryventilation system which works between two sources at different temperatures. ![]()
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