I've been lurking on this board for a few days and learned just enough to be dangerous. I had a tree go through the bedroom end of my house and damage the HVAC unit. No electricity has been applied to the unit since the hurricane. Their is visible damage to bedroom ductwork(completely collapsed and open to outside weather.) The return plenum has a hole big enough to drop a basketball into. The gas furnace is dented in 6 or so inches. The evaporator has external damage. The external condenser had no visible damage.
Inside house is all original 31 year old York equipment. Outside condenser is approx. 9 yr. old York Stellar, I believe it is 10 seer.
I live near Baton Rouge, LA. Very high humidity and 90+ temps.
All present equip is 4 ton. Was able to cool house comfortably. Ran near continuous in daylight in summer.
Three estimates so far. All suggest replacing inside and outside units. Reasons range from HVAC being "system" so you don't mix seer. Warranty problems with mismatching. Two weeks system open to humid air. etc.
Estimates high to low.
1. Bryant 4 ton 13 seer, all new ductwork.
2.York Affinity 4 ton 13 seer, all new ductwork.
3. York LX series, 4 ton 13 seer. replace only bedroom ducts with flex.
I understand installers would lean toward full system inside and out reinstall. Insurance adjuster leans toward just inside install. As homeowner I tend to agree with installers.
Question? Feasibility of mixing 10 seer and 13 seer equip. Explanation simple enough for homeowner and adjuster.