Heat　pump　energy　recovery　ventilators　have　been　widely　implemented　for　energy　saving　technologies　in　buildings.　Researchers　have　been　exploring　methods　for　the　most　effective　use　of　heat　pump　systems　for　fresh　air　supply　in　building.　Currently,　the　improvement　of　the　heat　pump　energy　recovery　ventilation　units　mainly　focuses　on　the　two　aspects:　(1)　Adopting　a　multi-loop　system　and　a　multi-heat　exchanger　system　to　reduce　the　irreversible　loss　in　the　heat　exchange　process　and　improve　the　system　performance.　(2)　Using　the　passive　energy　recovery　units　(including　rotary　wheels,　fixed-plate　heat　exchangers,　run-around　and　heat　pipe　heat　exchangers)　coupled　with　heat　pump　system　to　enhance　thermal　efficiency　of　the　whole　equipment.　This　paper　focuses　on　the　performance　of　various　system　configurations　and　develops　proper　control　strategies　for　the　heat　pump　and　their　integrated　systems　to　work　efficiently　under　different　weather　conditions.　The　review　notes　that　various　configurations,　parameters　and　evaluation　indicators　may　lead　to　significant　inconsistency　that　increase　the　complexity　of　comparing　and　analyzing　different　system　studies.　The　development　of　heat　pump　systems　with　multi-functions　features,　including　cooling,　heating,　dehumidification,　humidification,　fresh　air　and　air-cleaning,　have　also　been　presented.　©　2023