?In the present society,people pay more and more attention to the air quality of the living environment,and it is a trend to in-stall fresh air system in residential buildings.This paper analyzes the heat recovery in winter and summer of three-bedroom fresh air sys-tem with full-heat and sensible-heat two-way flow,It is concluded that the annual energy saving of the full-heat fresh air exchanger is better than that of the sensible-heat fresh air exchanger,The annual energy saving of sensible heat fresh air ventilator is 45％～70％of the total heat performance ventilator,especially in coastal areas only about 50％;At the same time,the common problems in the installation(equipment and pipeline),control,purification treatment of the full-hot fresh air system are analyzed,and the related solutions are put forward;It provides reference for the formulation and design of efficient,green,low-carbon residential fresh air system.
ResidenceFresh air systemEnergy EfficiencyControl system
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