Coil placement. The coil is definately in the top cabinet - and I feel fins like when I reach in there but I have not gotten a mirror to actually look at the coil. It feels like the top of an "a" coil with the legs coing to the sides of the cabinet. That might not jive with the tx valve placement But I was not looking or really trying to asertain the configuration - just know there were fins in the middle. I have 15 or 16 out lets and thet have modified the air ducts three times - maybe I actually do have reasonable air flow?