Starting to learn ACCA manual Q and have a question. If I am doing a retrofit on am RTU, and it's a 3 ton that needs about 400 CFM per ton. Currently it has a .8" blower static package, which is undersized because at .8" I am only flowing 350 CFM per ton. If the high static blower package can flow 400CFM per ton at the 1.2" it's rated for do I use that blower package or do I fix the ducts to achieve a lower friction rate? What are the cons to going with a higher static blower vs fixing the ducts? Just looking for more real world advice on this topic as I haven't seen it covered in the book yet. Thanks you!

Posted by coreysayre at 2021-04-03 14:35:53 UTC