"In my opinion there is only one way to measure duct leakage and it is as a percentage of fan flow. It can be measured directly, based on nominal airflow or using static pressure and fan curves. Pick one. Nominal would be the easiest, x% of 800 cfm =…"
"As a licensed HVAC contractor the key point to remember is its all about airflow. Does the airflow meet the comfort requirements of the area. If the area is not sealed and under insulated then the air flow from two registers is insufficient. Sealing…"
New York is increasing its energy standards and is investigating the possibility of implementing the Passive House Standard for new construction and retrofit projects. Interviewee: Ken Levenson, with NY Passive House Assoc and 475.