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[Kathyann Natkie <knat AT sprintmail.com>]

I know I have the formulas to settle this in the myriad of links I've 
clipped over the years but could one of you knowledgable types help me 
settle a debate please?
If one had a room with less glazing than needed to heat it optimally 
(warm only at 2pm on a sunny day so supplemented by woodstove) and one 
put black 55 gal drums of water in front of the glazing that is there. 
Would it make the room colder? Why or why not?
Thanks. This debate rears its head every year. (close cousin to the 
discussion about the "space heater" that is a panel fully inside the room.)

Kathyann