Louver Damper Adjustable 18H x 18W MPN:20UA21

Designed to protect air intake and exhaust openings from rain and weather while still providing excellent air flow. Mill-finish extruded aluminum drainable frame is 4 deep, 0.081" thick, and has 45° fixed louvers spaced on 4" centers, with pivoting louvers and TPV seals for weathertight closure. Includes 1/2" flattened birdscreen in removable frame mounted on interior. Standard manually-operated linkage kit for opening and closing. Unit also comes with a flange kit that speeds installation by eliminating the need for site-fabricating flashing, while providing weather protection by covering small gaps in installations. Presized aluminum extrusion construction with prepunched mounting holes; mounting hardware included. Optional Motor Kit No. 5NKP0 is sold separately.

Technical Specifications

• Item Combination Louver Damper
• Louver Type Drainable with Flange Kit
• Louver Max. Exhaust 1,114 cfm
• Louver Max. Intake 779 cfm
• Intake Louver Outside Height 20 1/2 in
• Intake Louver Inside Width 15 in
• Louver Free Area 0.521 sq ft
• Louver Material Extruded Aluminum
• Louver Item Combination Louver Damper
• Min. Wall Opening (In.) 18H x 18W
• Flange Width (In.) 1 1/2 in
• Number of Blades 3
• Inside Height (In.) 12 in
• Max. Velocity (FPM) 3,000
• Outside Width (In.) 20 1/2 in
• Blade Angle (Deg.) 45/90
• For Use With Intake or Exhaust Applications
• Includes Bird Screen

Manufacturer Details

• Manufacturer: Dayton
• Condensed Mfg Number: 20UA21
• MPN: 20UA21

Label Details

• Hazardous Material: N
• Green Material Flag: N
• Country of Origin: US
• CA Prop 65 Wht Label: N

Classification Details

• Harmonization Code: 7610900050
• GDS Category Name: Intake Louvers
• GDS Family Name: Shutters Dampers and Louvers
• GDS Segment Name: HVAC and Refrigeration
• UNSPSC: 40101504
• UNSPSC Class ID: 15
• UNSPSC Commodity Name: Ventilation
• UNSPSC Commodity ID: 04
• UNSPSC Commodity Name: Ventilation dampers
• UNSPSC Family ID: 10
• UNSPSC Family Name: Heating and ventilation and air circulation
• UNSPSC Segment ID: 40
• UNSPSC Segment Name: Distribution and Conditioning Systems and Equipment and Components

Shipping Details

• Not For Sale In: HI AK PR