u/Imagination_hat

We bought a 1950's brick cottage (1900sf, 2 story w basement) with a new 1000scfm AC unit. The upstairs is hot and the unit is freezing up. The HVAC guy told us that the duct work can only handle 350scfm. He said we would need to double the size of the ducts to accommodate the unit.

Or we would need to replace the unit w ith something smaller.

Are there any other options? A new unit would be cheaper than replacing the ducts. Are there any other options to consider? TIA!