Kitchen/cook top ventilation in PassivHaus/LEED home
I am building a new home to PassivHaus standards, while undergoing LEED certification. The LEED section on ventilation pertaining to kitchens seems unclear to me. We are providing ventilation of the kitchen via an HRV, but we couldn’t possibly tie in the ventilation unit that comes with the cook top (downdraft) as it uses a 600cfm motor. We instead were going to tie in the downdraft to a filtered recirculation unit. Our HRV installer said that he has heard of people tying in their cook top ventilation to their HRVs, however I am concerned that this would invalidate the warranty and greatly shorten the lifespan of the unit.