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what to charge for adding ducts
I'm working on a commercial site-one floor has a 550 sqft room supplied by two 10" flexible ducts-no returns. The goofy part is one duct is from one split system, the other from a second split system. Whenever the want to use that one room (w/o using the rest of the rooms on that floor), both systems must be turned on.
I've proposed piping both 10" ducts to one system and installing a return. Being as there are no returns currently, would 2 10" returns be ideal, 1 10" or possibly 1 12"?
edit: the units use 3.5 ton AC units-not sure of the gas heating output. The floorplan includes approximately 11 rooms, most of them less than 350-400 sqft each-only the room in the original question is served by two heating systems.
Last edited by 72chevy4x4; 02-08-2007 at 04:43 AM.
Reason: clarification
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