Breathable window retrofit system for buildings

Abstract

In various embodiments, there is described herein a breathable system for retrofitting an existing window, comprising: a secondary infill glazing panel adapted to be positioned adjacent to an existing glazing panel to form an interior cavity between the existing glazing panel and the secondary glazing panel, a frame enclosing exterior edges of the secondary infill panel, and at least one air permeable filter coupled to the frame adapted to allow an air flow between the interior cavity and an exterior space adjacent to the secondary glazing panel.

Dependencies are inferred from the claim text.