Continuous Extract Rule: The Junior Engineer Mistake

Continuous extract ventilation is one of the most misunderstood parts of Part F. This video breaks it down simply for junior engineers. In this video, I break down what continuous extract ventilation actually means, how it works within the wider dwelling strategy, and the key rules junior engineers often miss when reviewing residential ventilation design. We go through the minimum high extract rates, the link back to whole dwelling ventilation, and the common mistakes that can make a design look right on paper while quietly missing the intent of the guidance. This video is part of my Approved Document F series, built to help junior engineers understand residential ventilation design in a practical and simple way. Subscribe to The Lazy Engineer for more straightforward engineering explainers on regulations, HVAC and real design logic.