Kitchen and bath exhaust fan manufacturers give duct sizing charts for various air flow requirements, such as this EXHAUST DUCT VENT FAN SIZING CHART [PDF] from CaptiveAir Products, 4641 Paragon Park Road Raleigh, NC 27616 USA Tel: (919) 882-2410 Toll Free: (800) 334-9256 retrieved 2018/...
Weatherizationis the process of sealingup drafts to prevent the loss of heat or conditioned inside air to the outside. The most effective weatherization practices include blower door directed air sealing (work is typically done in attics and basements) and then adding insulation inavailableopen c...