Need more returns?
I was having low air supply from 6 registers causing hot/cold zones around my house. Found the 4" supply ducts were not only undersized for their respective rooms but were leaking, badly dented , 1 was completely disconencted and 2 of them were split to heat an upstairs and a downstairs room. Another register was simply a grill splapped over a hole cut in the side of the plenum...this register was porbably had the best flow.
I replaced 3 of the 4" supply ducts with 5", ran a 6" split into 2x 4" for the 1 of the up/downstairs rooms and added 1 new 5" for the other. Completley removed 2 of the 4" ducts from 1 room and capped them off at the plenum. That room used to have 3x 4" and 1x 6" supplies, it now has a 6" and a new 5" duct. I plugged off the plenum hole register and ran a proper 5" supply. Stuck dampers in all the lines.
Now the house is evenly heated without any cold spots. Airflow is pretty good/balanced at all registers. Should I add additional return air for the increase in duct size? How can I tell if I'm starving my furnace? Thanks for the help.
Last edited by Tabb; 01-19-2009 at 02:08 AM.