Some of the most helpful folks, on the alt.hvac usenet
group. Good suggestion.

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Christopher A. Young
Learn more about Jesus
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..


"Oren" wrote in message
...
On Tue, 3 Feb 2009 18:29:29 -0800 (PST), Sam

wrote:

Does anyone Know what HVAC Stands for?
Also what is a Thermal expansion valve for?


Yes!

Visit the alt.hvac group, plenty of answers there.