Hello all.
Any help is much appreciated.
Replacing my furnace and when they arrived they didnt have a 24.5" cabinet. They had a 21".
The AC coil is 24.5 and all ductwork above that.
They are not able to source quicly a larger cabinet and are going to build a small tapered duct to connect the 2.
Their other option was provide a higer output BTU furnace that comes in a 24 cabinet.
Any concerns with a smaller width furnace then the ac coil above it.
Take care.
I would not oversize a furnace just to get a larger cabinet. The newer furnaces are much smaller than the older ones. They can easily use a transition to adapt to the existing plenum.
Make sure they record the manifold pressure and the temperature rise readings.