Duct sizing for Fujitsu 9RLSFCD concealed duct unit
I am planning to install Fujitsu 9RLFCD concealed duct unit and can’t figure out way what size duct should I use and how to determine how many CFM does each room need. I have a heat loss done for each bedroom.
The plan is to put unit in the lower level aka basement (it’s split entry home) and run the duct work to the 3 bedrooms thru the floor. All three bedrooms are next to each other and would not require more than 4-6ft of ducts to each bedroom.
I would also like to use and add register in the basement ceiling to help heat the basement. Getting return air from each bedroom would be complicated and might require long duct runs, so was thinking to use basement as point for return air.
If anyone can help guide me at last with some “rule of thumb” idea that would be great. I know these are not good ideas, but I need to start somewhere.
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