I recently had a contractor build a wall which split one room into two. The new room is an office with two computers, and four monitors. It gets very, very hot, until the air conditioning turns on, then it gets very, very cold.
My contractor does not seem to know that much about sizing ducts.
There are two ways we can run a duct to that room.
Option A - The most direct way would be to run a four inch duct (the only size that will fit in that route) approx 20 feet with four right angles.
Option B - The other option is to run a duct (up to 12 inches) 60 feet around the basement up through the house and through the attic, about 60 feet with three right turns.
I think that Option B is the way to go, he seemed to think that a four inch duct would be fine for a small room (about 90 square feet).
Is there any way that a four inch duct would actually do anything over that distance with that many angles? Neither one of us has any ideas on how to size ducts (but at least I am aware of my ignorance)