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Discussion Starter #1
Hi? i am building a house. two story. i am using two heat pump and two air handler.

is okay and functional to have all the supply and return vent on the ceiling of the second floor and on the first floor all the supply on the floor and the return on the bottom of a wall. the mid floor will be completely insulated with Blow-In-Blanket system

please share your thought. pro and cons of this setup?

i will like to know if it is okay to use i joist bay as a return plenum. the same bay has electrical and low voltage wire running through it.


is it okay if i cannot bring the duct down to the air handler return box and use the air handler closet with a door as a return plenum to get the air from the return duct terminating on ceiling of the closet.


thank you
 

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Avoid ducts in the attic if at all possible.
Make sure to use a room by room manual J with manual D to design the ductwork.
That return you describe sounds poorly thought out and undesirable.
 

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Discussion Starter #4
hi? roughneck what would you suggest. the midfloor i joist is 12" tall. not tall enough for ducts. the house has attic and crawlspace
 
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