"MC" wrote in message
.. .

Had a friend in the business do the Manual clacs and due to the heat loss
he
came up with (not very effecient windows and need more insulation in
attic)
he said he would have went with a 3-ton unit for my size house. Also he
said
that with better insulation in the attaic I could still squese by with
using
a 3-ton with enclosing the garage, would also need to modify some of the
ducting to get better flow for adding the garage which I had anticipated.

I was also thinking of adding addtional 600 Sq feet on back of garage,
half
would be an upstairs office on the new addtion.

If I did that and after having a more thorough calc done, would a two zone
system be better? say devide living and bedroom areas and would two
systems
be just half each or at least total what a single system would be ? If a
two
system what areas would be best put on what zone ?


I think if I was you I would probly look into putting a wall shaker on the
garage / addition.......

IOW, how often will there actually be a need to keep those areas cool ???

--

SVL