I did not find much about the Blauberg ERV but the KOMFORT EC S seems an excellent product that competes and in some case exceeds the performance of Zehnder Q600. 
https://blauberg-na.com/wp-content/uploads/Catalog_KOMFORT_EC_S5B-D5B-S.pdf
Max Flow is 441 CFM so it is great for houses above 4000 SQFT r. It would allow to work in boost mode without going to max flow. At the end a big ERV is more efficient when used at low flows so we cannot oversize like a heating/cooling. Any feedback on this system?