I was told that American Standards AC systems are identical to Trane but
cheaper. Is this true or are there differences? Also what is the true
advantage of a variable speed condenser is it worth the extra $?
Yes they are some what the same.
They can save you money, if you are talking about 2-speed compressor.
Just make sure when you buy their high end equipment to buy what the
You can find this out at the manufacture's web page.
In all fairness, it comes down to "what do you want to do?"
Are you achieving comfort? You want efficiency? Or both? Do you want
economy? What's more important - immediate cost, or operational cost? Are
you looking for long term?
American Standard was purchased by Trane, as well as General Electric's air
conditioning divison. Are they the same? Not really. American Standard is
an "economy" unit compared to the Trane line.
On those not so hot days when your running the AC , the first stage
cooling is much cheaper to run for long periods of time versus the
start and stop costs of cycling the second stage cooling. Think of it
like a runner trying to get up to speed, it takes a lot of energy to
get going, but once your upto speed it is easy to keep going. The
same holds true every time your compressor fires up. Properly sizing
an AC to the house's demand is vital for energy consumption. Most
people think that the AC should be able to cool the house quickly and
shut down, this is not true , it should literally run all day long on
the most demanding days and still keep the temp where it is set.
Personally I would avoid TRANE / American Standard like the plague and
spend a few more bucks on a decent unit such as Carrier. You get what
you pay for.
Actually KPRO is right! The installing contractor can make or brake a
system install. Quality equipment and shoty install not a efficient system
Have you ever stopped and actually took readings to find out if what you are
saying is true? In other words using a watt meter? Just parroting what the
sales people ./ tech people say "may" not be what "we" all think it is.
In any sense of efficiency, the design of any unitary air condtioning system
should be designed for the "average day" for the area of the installation.
See [ASHREA] That being said, there are days that fall out of the design
criteria. On those days, the system is either too small or too large. With
all of those thoughts, a slightly larger system will be too large for "most
days." And, as a result "may" cost more to operate slightly and not
dehumidify the air as well as a properly sized system. You may experience a
"clammy" wet feeling with a system that is grossly too large. But a system
that's oversized by 1/2 ton may not present a problem. And yet on those
days when you really, really need it, it will work well.
It is highly recommended that the installing contractor perform ACCA Manual
J anylisis, and then those questions could be addressed. But most
contractors don't do the design work. As a result, the system is "slapped"
in with insufficient return air, insufficient supply design, and a grossly
overcharged system to keep that evaporator from freezing.
What the consumer ends up with is a system that cost more than necessary to
run each month, only because of the installation and not because of the
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