Knowing that in ERVs a small amount of exhaust air seeps/leaks into the supply air stream, is it possible to use an ERV to exhaust air for janitor closets, etc. for credit compliance?  The credit states "no recirculation of the air from these rooms is permitted"; however, ASHRAE allows the use of heat recovery devices for this type of exhaust as long as the potential re-entrained air through the recovery device is less than 5%.