Roof ventilators

Roof ventilators

Roof ventilators can be seen on many buildings. They have become popular partly because they require little or no duct work and partly because they do not take up valuable space inside the building. They can be subdivided in the following four ways:

1. Exhaust or supply

2. Upblast, radial discharge, or downflow

3. Axial-flow or centrifugal fan wheels

4. Direct or belt drive