Hi, I have a new ducts instaled and Carrier Infinity MVP 56 furnace and PErformance condenser 3 ton.
I hacve heat ing going very lucluster to front of house Lr ,Dr Ktchen,
Duct is run trough 4 90 elbov form furnace room ot crawlspace semi insulated [walls are brick ,cieling drywal and insul betveen joist]
duct main trunk runs surface on that cieling then branches round pieps 6" trough floor 6x, pressure not enough,
als owhe nheating i looked the duct is nice warm ,isnt shpuld be inuslated and how with what thnaks Gy