Is there a site on-line site where I can do a heating and cooling load
analysis on my home? I would like to determine the proper size of
heat pump to use. I found several sites where software could be
purchased, but I only need it once.
Personally considering the cost of an error, I would rather have someone
who knows their trade do the measuring and hopefully notice any unusual
situations to factor in, than to rely on myself. I would also want whoever
was going to install it to do the numbers for me. I would question anyone
who would install it without doing the numbers thenself.
I wish him luck finding a HVAC "pro" who takes the time to do the numbers.
I had to call up 6 guys to find one. The first 5 said, something like, "in
this area, with this size house, you need about a 3 ton system".
I will have the person doing the installing do an analysis, but I
would like to have an idea of what it should come out to before I just
take their calculations at face value. In this area, there are only
two dealers that handle the type/brand of heat pump I want. Not much
The Gas Appliances Manufacturers' Association (GAMA) has tool that
consumers can use to estimate their annual heating requirements and
compare the operating costs of different models:
Looks like you start by doing a load estimate.
On Fri, 28 Jan 2005 09:38:15 -0700, Dick <LeadWinger> wrote:
For an approximation, you just multiply the surface area of all the
walls, doors, windows, ceilings, etc. by the relevent U values (1/R),
and multiply that by biggest temperature differential you're
going to want between the outside and the inside.
You can probably expect the number that a pro comes up with to be
a bit off from that, but if it's a LOT different, I'd want to know
why. For finding the R values of various things, as well as
vast amounts of other useful and useless information, I cannot
recommend _Thomas J. Glover's Pocket Reference_ highly enough.
Hmmm, you'd be looking a long time in my area. I had three estimates
for a new furnace in 1997 and none of them bothered to do the
calculations, if they did they must've done them really fast where I
didn't see it. I'll be a lot more careful nex time.
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