OK, now I get it... when you said:
Quote:
Originally Posted by MN Renovator
It only gets down to 45 degrees in west washington.
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You actually meant, "...the statistically average temperature for the coldest months in western washington is around 40F but variations in weather can cause spikes above and below that amount by 23F degrees (the generally assumed designed temperature for this weather shed is 17F) or more, so it is advisable to plan your heating accordingly."
Sorry, I didn't read between the lines...
-AC