Soidul asked:


i am working in a building construction company. so some time i have to calculate mechanical HVAC duct size according to variable cubic feet per minute (CFM). as like 12″ X 10″, 8″ X 6″ etc. so i need any formula so that i can calculate rectangular & circular duct length and width. please please please send me.

Diamond Prices

allen gong asked:


I was wondering what procedures are there to obtain a HVAC license, if anyone can also answer these additional questions for me, really appreciate it, thank you

How long does the process take?
How much does it cost?

Georgia Real Estate