Room Pressurization from existing AHU's

Consider a scenario, where I need an additional air of 500CFM to maintain "XX Pascals" positive pressure in the room. The AHU capacity is 3000 CFM, (2500 as per the heat load and the additional 500CFM to maintain the pressure) and the return duct is sized so as to take n 2500CFM. The rest 500 shall be suked in from the Fresh air duct by the AHU blower. Will this work??

Or, should I install aditional fan for this 500CFM air??

Please have a look at the attached pdf.

Attached Files

• AHU.pdf (6.0 KB)