BayPointArchitect
Sawhorse
While reviewing tenant finish plans for a barbershop, I noticed that the mechanical contractor provided the following calculations. The CFM per room seems rather small and I am wondering if these are the calculations for "fresh air" and the amount of conditioned air would be closer to 1 cfm per square foot or 5 cfm per calculated occupant load. Not that I really need to know but I am just curious if anyone else can tell me what these formulas relate to.
CFM Equation Chart:
8 x 10 Break Room
8 x 10 x 8 = 640 / 60 = 10.67 = 11 cfm
5 x 10 Hallway
5 x 10 x 10 = 500 / 60 = 8.33 = 9 cfm
6 x 7 Utility/Laundry
6 x 7 x 8 = 336 / 60 = 5.6 = 6 cfm
7 x 7 Restroom
7 x 7 x 8 = 392 / 60 = 6.53 = 7 cfm
45 x 20 Main Barbershop Area
45 x 20 x 10 = 9,000 / 60 = 150 cfm
Again I say that these amounts of air flow are really insignificant unless it relates to a minimum amount of fresh air. If you can reference the code section where this equation comes from, that would be great.
Thanks again everyone!
ICC Certified Plan Reviewer
NFPA Certified Fire Plan Examiner
CFM Equation Chart:
8 x 10 Break Room
8 x 10 x 8 = 640 / 60 = 10.67 = 11 cfm
5 x 10 Hallway
5 x 10 x 10 = 500 / 60 = 8.33 = 9 cfm
6 x 7 Utility/Laundry
6 x 7 x 8 = 336 / 60 = 5.6 = 6 cfm
7 x 7 Restroom
7 x 7 x 8 = 392 / 60 = 6.53 = 7 cfm
45 x 20 Main Barbershop Area
45 x 20 x 10 = 9,000 / 60 = 150 cfm
Again I say that these amounts of air flow are really insignificant unless it relates to a minimum amount of fresh air. If you can reference the code section where this equation comes from, that would be great.
Thanks again everyone!
ICC Certified Plan Reviewer
NFPA Certified Fire Plan Examiner