With a U-factor of .10 (R-value of 17.5), and one of the best overall air infiltration ratings in the industry, the Thermacore^® Sectional Steel Door Model 599 is one of the most thermally efficient door systems in its class. The Model 599 doors also carry a Class 26 sound transmission rating for applications where sound suppression is desirable. The Thermacore^® line features steel-polyurethane-steel panel construction which provides a thermal barrier that withstands extremely hot or cold climates and the most demanding environmental requirements.

The Thermacore^® Sectional Door Model 593 is one of the best-selling doors in the Thermacore^® line, and offers superior thermal efficiency to fit a broad range of applications. The Model 593 exterior skin is constructed of galvanized steel with a ribbed, textured finish. It is available with a white interior finish and a choice of white, industrial brown, tan or gray exterior. The Thermacore^® Model 593 offers excellent thermal efficiency for medium-duty applications.