Download the PDF When is Fire Rated windows needed? 

Download the egress PDF

U-Factor represents the rate of heat flowing out of a window or door in an hour's time. The lower the number, the better the glass insulates. SHGC - Solar Heat Gain Coefficient rating measures the amount of solar radiation that enters as heat. The lower the number, the less heat the glass allows in.

You may contact Optimum Window Mfg. by using the below information:

Optimum Window Mfg.
28 Canal Street
Ellenville N.Y. 12428
(845) 647-1900 
      
sales@optimumwindow.com

If you would like to contact us on the web, please use our Web Contact Form Click Here.

A rough opening is the hole that the window sets in. The frame size is the manufactured size of the window or door.

 Optimum Window Mfg. has a wide verity of RAL Powder Coated finishes and colors but you are able to get them in primer if you choose.

The UL label for fire rated window is located on the left jamb between the sash and the jamb (if any) at the bottom looking from the inside of your window to the outside.