We are looking to replace our 4 ton a/c unit in our house. Here are the
stats on the house:
1. 2200 sq ft house
2. Three attics (front, back, middle)
3. Insulation = shredded newspaper treated with flame retardant.
a. The insulation is crumbling into dust.
4. Windows on house are single paned, aluminum CHEAP windows
a. The kind used in houses in the 1960s.
5. House was built in 1964.
6. Windows are chaulked but still leak tremendous amounts of heat/cool
because, as I said, they are cheap windows. (You can feel the heat
radiating off of them right now.)
1. The a/c guy only wants to replace our 4 ton unit with another 4 ton
unit. His reason is that technology has advanced and a new 4 ton unit
will work better and cool better. Question: Will it?
2. Our contention is that (as the a/c guy explained to us) 2200sqft/500
= 4.4 tons of a/c. Question: If the equation comes out to be 4.4 tons -
shouldn't the a/c guy go to at least 4.5 tons?
3. Given all of the bad problems with the house (and yes - we should
reinsulate the house and get better windows - but I'm unemployed and we
can barely afford to get the new a/c) - Question: Should the a/c guy
blindly follow the specs he is quoting or should he realize that, given
the condition of the house, he should increase the number of tons to
compensate for the conditions?
Our outlook is that, given the conditions of the house, a larger unit
would work better. We might have to pay more for it but at least, here
in Houston, Texas - we would stay cool inside while the temperature
outside rises to over 100 degrees.
Please give me some feed back on this because we would like to be able
to present some valid arguments to the a/c person (other than what we've
already pointed out to this guy) on exactly why this blue book's
equations can not be strictly adhered to and instead need to be modified
to our needs.
Thanks in advance for any help you can give.