我的理解,UNINSULATED的就是一层皮(当然应该有加强筋),INSULATED就是2层皮厚些的,里面有填充隔热材料的。
不知道对也不对?
INSULATED要好些吧,能差多少钱啊!
我7月在HD买的9‘X7’的是254+TAX
2000SP
3-layers construction
2-inch
R6.5 insulation
This door is the same as their Model 2050 which sells for 339.15$ (originally 399$)
The only difference is the sheet metal gauge used... one is 28gauge and the other 26gauge I believe.