My current thru the wall A/C unit w/heater needs to be replaced. The existing model is an older GE unit (AJES12DCDM) and I am looking to replace with the newer GE model (AJEQ12DCD) or the Soleus KTW12H. The current sleeve is not a GE sleeve, but it fits the unit just fine. The only problem is that it does not have a rear grill (never had one when we purchased the house). I would like to avoid buying/installing a new sleeve and just purchase a rear grill since the unit is going to be expensive as is. However, I am having a very hard time finding out what make/model the current sleeve is.
Long story short....If I bought a rear grill that has the same dimensions, but not the same brand as the existing sleeve, will it work? I attached a picture of the unit/sleeve from the outside of the house.