On 1/18/2013 11:03 PM, Scott Pittman wrote:
I have always read that any airspace between the glass or poly should neverThere is plenty of glass double pane panels that have 3/4" airspace.
exceed 5/8 of an inch to prevent a thermal loop from developing which would
defeat the purpose of double glazing. This is certainly the rule inMy method just uses two Polycarbonate glazing attached to framing
manufactured thermal pane windows and doors. By evacuating the air space
between the glazing panels you can slow down this effect with over time the
vacuum gets lost.
members, not air evacuated. My untested theory on prevention of thermal
loops would be to use more framing members, blocking more light of
course but creating a stronger panel that is more energy efficient. I
would not hesitate to use this method on a skylight, in a sunspace or
or a greenhouse. This by far the cheapest way to go plus extremely
durable and lightweight; you get plenty of light with some degree of
thermal efficiency.
LL
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