HRV

Generation 1 HRV System
High Efficiency - Grade F7 - EU7
Filter class - EN779 - Eurovent 4/4 Performance data based on ASHRAE 52.2.1992

Generation 2 HRV System
High Efficiency - Grade F8 - EU7
Filter class - EN779 - Eurovent 4/4 Performance data based on ASHRAE 52.2.1992

New Zealand HRV units require either; the Generation 1 F7 Box type filter, if your box is a metal box (if you have a twin fan model HRV, you will require 2 x filters - one for each fan), or a Generation 2 F8 Box type filter if you have a plastic box