Duct Protection - CaptiveAire EWC Installation, Operation And Maintenance Manual

*Isolated Plenum Place for Clarity
Plenum
Nozzle
Height
Filter

Duct Protection

The ADP nozzle is used for the protection of exhaust ductwork and can protect any duct cross-section type
(e.g. round, square, or rectangular). A sufficient quantity of ADP nozzles must be provided to ensure that
no single nozzle coverage exceeds 50" in perimeter.
A single ADP nozzle will protect a duct up to 50" perimeter (16" nominal diameter) and unlimited length. A
minimum of 2 ADP nozzles is required for protection of ducts from 50" to 100" in perimeter and unlimited
length. A minimum of 3 ADP nozzles is required for protection of ducts exceeding 100" perimeter (32"
nominal diameter) and unlimited length.
When using multiple nozzles (modular protection), the coverage area for each nozzle must not exceed 50"
perimeter. Table 3 details the maximum rectangular duct configurations for one and two nozzle duct
protection.
1
1. Duct
2. Hood
Figure 19 - Dual V-Bank Filter Plenum
SIDE VIEW
4' Max
Filter
Figure 20 - Nozzle Duct Protection
3
2
17
*Isolated Plenum Place for Clarity
10' Max
0-6"
1
3. Single Nozzle
4. Dual Nozzle
TOP VIEW
Plenum
Nozzle
4' Max
4
2