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Thank you both for the responses. I was able to get what I needed from that.

Hello: I have a few buildings I need to evaluate for proper fresh and total air changes per hour. Is there a common or codified "place" that I can look for the original engineered numbers? There are general room by room CFM balance for each grill on the drawings, but nothing that speaks to how...

Thanks everyone. Sorry for the late response. Regarding an additional 900 CFM outside air unit. I'm thinking of specifying a 100% outside air supply with an energy recovery wheel. The main supply and return are close enough in the plenum to add a dedicated line for both. The ducting is 24/10...

Hello, I'm currently working on the HVAC system of a modular building that is approximately 4,000 sqft. This building has been designed with two typical residential style furnaces (less than 2 years old), each serving approximately half of the facility. There is currently no method for the...