Glass

Low E1 coating is a good choice when you want maximum solar heat gain (or maximum heat transferring into your house from the sun) and radiant heating properties (keeping heat on the side of the glass where it originated). This type of coating is generally used in Northern climates where heating is prioritized over cooling. You’ll reap maximum benefits when windows with this type of coating are positioned to receive direct sun exposure.

The most common Low E coating since it works well across most geographic regions and climates. Low E2 with two metallic coatings balances less solar heat gain and improved radiant heating properties.

Used in applications where solar heat gain may be a concern, low E3 coating uses multiple metallic layers for radiant properties similar to Low E2. This type of coating is most commonly used in Southern, sunny climates where cooling is prioritized over heating.

A higher performing Low E glass with significantly improved U Factors (ability to keep heat inside of your home). This coating is placed on the interior surface of the glass and can be touched. It is used in conjunction with Low E2 or Low E3 and helps reflect radiant heat back into the room. This means a slightly cooler interior glass surface since the heat is not absorbed by the glass. The cooler surface may see a bit more condensation in cold climates versus traditional Low E glass make-ups. Abrasive products should be avoided when cleaning the glass.