video1.0<iframe src="https://www.loom.com/embed/dfde9ed2f15f46e79653f3b7dc81878f" frameborder="0" width="1618" height="1213" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>12131618Loomhttps://www.loom.com12131618https://cdn.loom.com/sessions/thumbnails/dfde9ed2f15f46e79653f3b7dc81878f-05a3e03ab70bf86c.gif449.159This Loom explains how to verify Manual J inputs to trust HVAC load calculations. It recommends reviewing the Manual J report starting with design conditions and then scanning page two for zero values, fixing issues such as an exterior door misclassified as interior and ducts set to non-ducted despite being duct wire in an unconditioned basement. It also flags large load contributors like floors, checking page three for inconsistencies in insulation and window performance metrics such as U-value and SHGC. The presenter demonstrates correcting a clear single-pane window and inconsistent wall construction (2x4 versus 2x6) to make assumptions consistent across the home.