HEAT RECOVERY VENTILATION SYSTEM (HRV)
Heat Recovery Ventilation system is an energy ventilation system which was installed and hanged on the ceiling or closed to are of heating room , the function of HRV system is focus in Heat exchanger , outdoor fresh air and indoor muddy air had been exchanged by filter inside the HRV system for inbound and outbound air flow ,additional thermostat which was installed on the main floor to control van speed of HRV system .