A combination unit is a self-storing accessory that easily installs to the exterior of 200 Series narroline® double-hung, 400 Series double-hung, and woodwright® double-hung windows.
Consists of an upper and lower storm panel and an insect screen all in one unit.
The frame is a low-maintenance prefinished aluminum.
Designed to fit unit size 20210 - dimensions are 23 13/16" wide by 34 27/32" high.
They are energy efficient and ideal for sound reduction for locations near airports, busy roadways, or other noisy environments.