Marvin's All Ultrex casement windows are available in custom sizes of 1/64\" increments. The windows are made with Ultrex, a fiberglass product that's eight times as strong as vinyl. The windows have folding handles and use a single-handle multi-point sequential locking system for security. All Ultrex casement windows come with the option of ultra energy efficient LoE3-366 glass, which delivers a U-value and solar heat gain coefficient equal to or less than 0.30, thus qualifying for the energy efficiency tax credit. For more information, visit marvin.com.
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Advanced window technology can minimize heating and cooling costs.