Posted by massey 333 on January 26, 2011 at 07:38:06 from (209.173.185.178):
In Reply to: Re: OT Heat pump posted by biggerred on January 25, 2011 at 19:58:26:
I don't know where you are going with this,but you are 100% correct.HPs have no backup to them other then what the dealer and customer agrees to put in for backup or emergency heat(gas-Oil or electric or Hydronic)for when temp.gets too cold for the HP to be efficent.Some HPs are 2 staged but still need a backup for -10 temps.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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