The 490 Series
When only the best will do, the 490 Series exceeds expectations.  This door features patented ThermacoreŽ construction -- a CFC-free, foamed-in-place polyurethane insulation sandwiched between an interior and exterior skin of galvanized steel.  Industry-leading EPDM between section thermal seals minimize air infiltration and thermal transfer.  A 17.5 R-value makes the 490 Series among the most thermally efficient doors you can buy.