There are a variety of options for operable storm windows for ventilation, - all of which have screens available.

Operating Historic One-Lite  (HOL-OP)

This exterior unit is designed for Double-hung windows.

Operating Magnetic One-Lite  (MOL-OP)

This interior unit is designed for double-hung windows.

Slide-A-Way  (SAW-2)

This interior unit is designed for steel or aluminum casement windows.