Mary,

The HVAC unit we added contained a 2-ton AC unit to cool the 360 sq. ft
sunroom. Our main unit has a 4.5 tons of AC for about 2200 sq. ft. The
main unit was not big enough to handle an additional room of that size. One
rule of thumb I've read before on this ng is 1 ton per 600 sq. ft. Maybe
someone else can verify this.

Regards,

Joe Morris

Please remove ZAP to email me.

"MaryL" wrote in message
...
Thanks! I'll look into this ... I do like things cool, and the whole
point
of a sunroom is to be able to spend time there looking at birds and
plants -- and enjoying it, which I can't do in the "real" outdoors because
it's too hot for me! Someone else mentioned a heat pump. I'll ask about
both of these possibilities. I really hadn't thought about a second AC or
a
heat pump until I saw these messages. I had assumed that the AC/heating
ductwork from the house would have to be extended, and I knew that could
be
a major problem. I also know just enough about sizing a unit to the area
to
be heated and cooled to know that it often isn't feasible to just "add a
room" for a n existing unit to cool.

MaryL
"Joe Morris" wrote in message
...
Mary,

Since our sunroon was about 360 sq. ft., the general contractor and HVAC
subcontractor both recommended going with a central unit. If your room
is
not large, and if it is on the north side of the house, and if you live
in
Minnesota, you might get by with a window AC. For my money, it is worth
something to make sure you have enough AC. If you have several people
over,
the last thing you want is a marginal AC situation. Our central unit is
in
the attic space above the room. The compressor sits outside beside the
other system's compressor on the same concrete pad. There is probably
less
noise with the central unit. There may even be energy savings if you
use
the room a lot.

Regards,

Joe Morris

Please remove ZAP to email me.


I live in Florida and would like to replace the screened porch with
a
sunroom.
My A/C person, said it would be best to just get a window type A/C
for
the
sunroom.
~Jazzy~

Thanks. That is what I hope to avoid, but I know that may turn out to
be
the best option.

MaryL