HRV FILTER system names
HRV Systems have names to depict how many fans it has & how many filters you will need when changing filters.
JANUS is 1 x Fan so 1 x filter
ARIZONA is 2 x Fans so 2 x filters
PHOENIX is 3 x fans so 3 x filters
RANGO is 4 x fans so 4 x filtersThe above name does not tell you what generation the system is, PRE 2014 is the older steel fan box HRV system so generation 1 filter is needed post-2014
is the newer Plastic Box HRV so generation 2 is needed