Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

EHH-401

General arrangement objects

Greenheck EHH-401 wind-driven-rain louver

Coordinate the rain-resistant frame and sill arrangement with the wall drainage detail. Set out support members without blocking blade passages or access to a screen.

Drawing use

GA

Application

Equipment layouts

Reference family

Manufacturer

A distinction that matters

The product family is distinct from conventional stationary ESD louvers and from EHH-501.

Full referenceAdd to legend

GA

General arrangement objects

Ventilation intake louver

An intake louver forms a selected air-entry interface in a wall or enclosure.

Drawing use

GA / SLD

Application

Equipment layouts

Reference family

Manufacturer

A distinction that matters

Overall opening area does not equal the louver's effective free area.

Full referenceAdd to legend

Follow the full entry for source drawings and the appropriate standard or selected product. Equipment previews show a manufacturer drawing where available, otherwise a 3D thumbnail.