Aubrey Geweber from Zehnder inspects our HRV for official commissioning, which means that he’s going to spend several hours examining the whole set up and adjusting the volume flow rates for normal operation in the house and the balance for outdoor air and exhaust air. A drywall screw rattling around in the exhaust fan may have been the source of occasional error messages on our control panel.Using a velometer to measure airflow from the vents and balance the system between rooms.The nozzle on the left is for the RETURN vent. On the right is an air SUPPLY vent. The openings on both are adjustable to control air flow. These are mixed in with our can lights on the ceilings of every room. The air flow is very quiet.

Aubrey estimates that about a half dozen houses in New York’s Hudson Valley have Zehnder HRVs, and there’s a lot going on in Brooklyn right now.