Green Hammer’s Ankeny Row homes meet the Passive House Standard with whole-house, balanced, continuous ventilation with heat recovery.  This ventilation system includes an exhaust vent located in the kitchen. Code requires a direct-through-envelope, intermittent operation, high-volume range hood exhaust system.  On appeal, Green Hammer demonstrated the passive house ventilation system is environmentally superior because it provides more ventilation than the code requires as well as heat recovery for greater energy efficiency.  The City of Portland allowed this ventilation system as “an alternate method/material.”