Hi I am currently living in three level townhouse. Garage and basement(small room next garage) are on first level and living room and kichen are on second level and three bedrooms are on third level.
I am currently working on my unfinished basement. I lowered ceiling because of supply air trunk and return air trunk.
My questions are
Can I add both supply air and return air on the ceilling?
Do I have to tap supply air from the top of the supply trunk? Or Can I tap it from the bottom of the supply air trunk, which will be ceilling for basement.
Can I tap return air from the ceilling?
Can I add supply duct next to walk out door and return duct in the middle of the room?
What size should I use for both of them?
How can I figure out the air flow?
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