BPI Building Analyst Training Terminology and Definitions 100% Correct

BPI Building Analyst Training Terminology and Definitions 100% Correct ACCA - Air conditioning contractor association ACH - Air changes per hour AFUE - Annual Fuel Utilization Efficiency averaged over a heating season. ( Does not include distibution losses) Air Barrier - the barrier that prevents infiltration of outdoor air into the conditioned spance and exfiiltration of indoor air to thhe outside. Also known as "Pressure boudary". ( It should be continuous and aligned with the thermal boundary) Air Changes at 50 Pascals (ACH50) - The number of times the volume of air is exchanged when a blower door depressurizes the home Air Exchange - The total building air exchanged with the outdooes through air leakage and ventilation