Each Series 4800-T is made with a custom designed thermal strut. Fleetwood designed the strut to allow the Engineering Department to fulfill the high expectation design notables.
The energy test results of the Series 4800-T are outstanding because of the minimal frame, specialized engineering, and custom thermal strut. For example, with low emissivity glass, the Series 4800-T achieves a 0.25 U-Factor.
Numerous Glazing Options:
The Series 4800-T offers more glass choices than any other aluminum fixed window in the luxury home market. This is possible with the number glass depth choices and the myriad of glass offered in the industry.
Insulated glass larger than 100 square feet is available in the Series 4800-T.