Sizing Duct Questions

goalmakers

Hello,
I am a mech contractor in Michigan (do not do sheet metal). I was asked by some friends (drinking buddies) to help solve a cigarette smoke problem at thier club. I suggested adding a air to air energy recovery unit (100% outside air) to match the existing AHU.

Ruud Model#: UKKA-A073DL13E. (2800 cfm)
Bldg Size: 39' x 39' x 9'6"= 14,692 Cubic Ft.
Capacity: 125 max. Normal:50
Building used average of 5 hrs. per day.

Questions;

1. What size duct is needed to supply the 2800 cfm to the building?

2. What size duct is needed for the recovery ventilator?

thank you

John

Aceinstaller

bring the prints into a local heating supply house and ask for a load calc.

There will be many variables for your particular situation and they will adress them and provide you with the answers.