Combustion and Ventilation Air Sizing 

Thanks Greg appreciate the content you put out there! You help more people than you realize, cheers!

Hey Garg missed you a lot. Please post more videos for G3 license.

Hey !! Can you please do one for chimney liners !! And using the C1-C10 tables please !!!

Hey greg ! excellet video. Im a student at Durham college writing my g3 in 2 weeks time. Could you do a video on the procedures for wiring a T-stat ? Even a video on electricity would be great. They showed us very little on this stuff and never bothered to revisit it after one class.

perfect! got any info on the g2 examination? going over the manuals right now