DSDS Videos (below) are:

- DSDS Nozzle Demo using transparent window

- DSDS Nozzle Installation Instructions

- How to test a Return Duct Smoke Detector

- How to test a Supply Duct Smoke Detector

DSDS Nozzle Demo using transparent window:

Installing a DSDS Nozzle:

Testing a Return Duct:

Testing a Supply Duct: