Let's forget "rules of thumb" for a minute and listen to Dr. Allison Bailes on how to properly size a duct in a residential application. First article in series https://www.energyvanguard.com/blog/basic-principles-duct-design YouTube video using YJ Cylinder Heater https://youtu.be/xXp2u16tnY0 NiceJob for reputation marketing https://nicejob.grsm.io
