I'm looking to have a central air conditioning unit installed for my
house and would appreciate some feedback between Trane, Lennox and
Carrier. My house is a 2200sq/ft bi-level, meaning that it does not
have a true basement. About half of my my lower level floor walls are
above ground, where as the typical basement walls are almost all below
ground level.

Most of the whole house A/C installation installation companies in my
town either carry Trane, Lennox or Carrier, and thought I'd seek some
opinions about the three in here first.

I guess what is more important to me would be finding out who
generally makes the most reliable central A/C units. I understand
that I should consider the SEER numbers when considering to purchase a
central A/C unit, but that will depend on the models available.

Any input or feedback would be greatly appreciated since this will be
my first time ever purchasing a central A/C unit. Thanks for your
time and courtesy.