2045 Spacing Between Layers of Glass - House Interior - Windows Skylights Solariums -

Image Text: Cross section > spacing too small - conductive heat loss > Heat loss > outside glass > inside glass > spacing too large - creation of convective loops > spacing correct - about 5/8 inches > outside glass > inside glass > Less heat loss > More heat loss > metal spacers have greater thermal conductivity than rubber spacers (let more heat escape) > more heat is lost around the edge of a window (through the sash) than in the middle of the window - this is called EDGE EFFECT