Should Low E Glass Inside Outside

Low-E Insulated units should be glazed with the Low-E facing on the outside, clear on the inside.

Does Low-E glass go on inside or outside?

The effectiveness of low-e glass is dependent on the direction the coating is facing. For single pane windows it is recommended the low-e coating is always placed on the inside facing surface. Low-e coatings are sensitive to weather and pollutants making it difficult to clean without damaging the surface.

What surface should the Low-E coating be on?

Passive low-e coatings function best when on the third or fourth surface (furthest away from the sun), while solar control low-e coatings function best when on the lite closest to the sun, typically the second surface.