I have a single story ranch where I am having a central AC installed.
The house has forced air heating so there is existing ductwork. I had
an installer here for a quote and he told me that the area is about
1500 sq. ft and he would put a 2.5 tonne unit. I have a family room
with no ductwork and a separate heating unit. I would have a window AC
in that room. The area for that room is not included in the 1500 sq ft
mentioned above. This family room is connected to the main house
through the dining area so there is no door.
I want to know if the size of the unit is correct? He said that if he
puts a 3 tonne unit in, it might have problem pushing the air through
the existing ductwork which is not top quality. So it might cause more
problems than a 2.5 tonne unit. Also these parts of northeast don't
need that much cooling so it should be sufficient.
He offered me a 10 SEER unit (brand new, Rheem) with a 5 year warranty.
Compared to the 13 SEER unit (also Rheem) with a 10 year warranty (on
the condenser, for both), this one costs me about $450 less. I think I
would be ok with a little less efficient unit and lesser warranty but
is there something else on the 10 SEER unit that I might want to take
into account now?
Finally, is there any other question I should be asking the installer
to verify the quality of the install? I have gone through some posts
in this newsgroup and I understand the quality of the installation is
as important as the quality of the unit.
Thanks in advance for your time.