Hi to all,
We had some remodeling done a couple of months ago and needed three additional ducts for a new room. There is about 10 inches clearance above the main supply duct, where I thought the new 6" ducts would be connected using one elbow.
However, the HVAC subcontractor thought it would be too difficult to cut a hole in the top of the supply duct (with only 10" above the supply) so he brought the new 6" duct over the supply duct and connected it to the far side using two elbows. This was done for all 3 new ducts and there is very little air coming out of the registers. I think that removing the extra elbow might give us enough air in the new room.
I would appreciate it if anyone could tell me:
1) Is there enough room to connect a 6" elbow to the top of the supply with 10" between the top of the supply and the ceiling? Is there a type of fitting that could be attached to the top of the supply that transitions to a 6" duct but requires less vertical space than a standard 6" elbow?
2) Does 10" provide enough room to work to cut the hole in the top of the supply? If not, can the hole in the top of the supply be made by cutting the bottom of the supply, then cutting the hole in the top, then patching the bottom of the supply.
Thanks in advance,