Field Notes Range Hood Make-Up Air Over 400 CFM: What the IRC Requires and How to Wire the Damper ADP-1101-05AOct 02, 2026 Motorized Combustion Air Dampers Under the IFGC: What 304.10 Requires and How to Size the Opening combustion airOct 02, 2026 Get Field Notes by Email One practical article a week on damper wiring, sizing and code, written for contractors by the team that builds Hoyme dampers. Your email SubscribeFree. Unsubscribe any time. Follow us