Acetec A100 Filter F7
Östberg original filter, filter set for Östberg heru models as below.
Östberg's Ftx units Heru S series are horizontal units with connections on each side, common for placement on wind and cold wind.
Also fits FTX units
Östberg HERU 100 S
Östberg HERU 75 S
Östberg HERU 90 S
Östberg HERU 50 S
This kit contains a filter for exhaust air and one for supply air.
These compact combustible filters fit into the HERU 50/75/90/100 S energy recovery unit