Another version of the DIY Spray booth, this one is using a Centrifugal Fan.

Below, the main components
Centrifugal fan, Flexible hose/duct, Hose clamp (the can drink is just for scale)

These were bought from :

Hean Lee Radio Service

31 Kelantan Lane #01-30, Singapore 208654

Phone: 62940184

Disclaimer :

The information above is posted as a service for all modellers.
SprueCutters.com is not associated with Hean Lee Radio Service.
The listing does not imply endorsement of the products shown.

The fan data

Another view of the Centrifugal fan

This is how the duct is clamped onto the fan's outlet

The storage box, which will form the spray booth chamber

Bottom of the box cut out

Fan is fitted and taped to form an air-tight seal

More useful information on DIY spray booths over on Plamo forums.