Only the following units are available to add Low-e Glass:  J-4A Poly Venting J-4B Poly Venting J-4C Poly Venting J-4D Poly Venting

Only the following units are available to add Internal Grilles: J-4A Poly Venting  Only the following units are available to add Tempered Glass: J-4A Poly Venting J-4B Poly Venting J-4C Poly Venting 20 x 34 Leaded Glass Venting Octagon Units Are Not Available! Please check your overall wall thickness before ordering to assure a proper jamb depth for your window. Our jamb extensions are unassembled or can be applied to the window unit in our factory prior to shipping. Separately shipped jamb extension price includes an additional amount for shipping and handling. Please check your local building codes for tempered glass applications in a bathroom or hallway. Internal grilles are aluminum and available in the same colors as the window units excluding T-Tone. Please be sure to specify internal grill color if different from unit color. If grille color is not specified it will be the same color as the unit excluding T-Tone.