"jessica" wrote in message
ups.com...
I ment 'We just do NOT want to oversize the unit.'

Humity is an issue here. What is VFD? We are getting a propane furnace
with a variable speed blower so we can get the higher SEER out of the
heat pump. Does this have anything to do with VFD?

He will be enlarging the cold air intake and putting the filter there.

VFD= variable frequency drive same as your words "blower"


Since he is enlarging the return, ask about making the filter area at least
1.5 times the area normally used. Example, if the normal filter assembly is
a 20x25 use a 20x30 filter cost is the same. but there is more surface area
for the fan to draw from. My new York a/c has some serious issues with
static air pressure. Basically give it a dirty filter and it will not cool
my home. The unit loses most cooling at 0.70 inches of static. Not great
when the filters I use CLEAN start out at 0.28.

Also ask about a tube return grill instead of the stamped grill. Again less
static air pressure.
Just suggestions for better performance.