A heat recovery arrangement. The arrangement has a housing including a
bathroom exhaust inlet, an exhaust outlet, a bathroom exhaust airflow
path through the housing from the bathroom exhaust inlet to the exhaust
outlet, a return air inlet, and a return air path through the housing
from the return air inlet to the exhaust outlet. The housing also has an
outside air inlet, a supply air outlet, an outside air path through the
housing from the outside air inlet to the supply air outlet; and a heat
recovery device extracting heat from the exhaust airflow path and the
return airflow path and transferring heat to the outside airflow path.