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E| Style | Model | Rough Opening Height | Rough Opening Width | Free Area | Max. Intake | Max. Exhaust | Number Of Blades | Flange Width | Inside Height | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 20UA20 | 12" | 12" | - | - | - | 2 | 1 1/2" | 6" | £413.19 | |
| B | 5NKH6 | 18" | 18" | 0.521 sq. ft. | 438 CFM | 625 CFM | 3 | 1 1/4" | 12" | £538.99 | |
| C | 20UA99 | 18" | 30" | - | - | - | 3 | 1 1/2" | 12" | £676.10 | |
| C | 20UC19 | 18" | 48" | - | - | - | 3 | 1 1/2" | 12" | £848.72 | |
| A | 20UA21 | 18" | 18" | - | - | - | 3 | 1 1/2" | 12" | £641.13 | |
| C | 20UC33 | 18" | 60" | - | - | - | 3 | 1 1/2" | 12" | £849.94 | |
| C | 20UA93 | 18" | 24" | - | - | - | 3 | 1 1/2" | 12" | £687.83 | |
| C | 20UC12 | 18" | 42" | - | - | - | 3 | 1 1/2" | 12" | £700.18 | |
| C | 20UC07 | 18" | 36" | - | - | - | 3 | 1 1/2" | 12" | £696.32 | |
| C | 20UC26 | 18" | 54" | - | - | - | 3 | 1 1/2" | 12" | £802.63 | |
| A | 20UA25 | 24" | 36" | - | - | - | 4 | 1 1/2" | 18" | £803.82 | |
| C | 20UC13 | 24" | 42" | - | - | - | 4 | 1 1/2" | 18" | £931.82 | |
| D | 5NKH7 | 24" | 24" | 1.349 sq. ft. | 1005 CFM | 1444 CFM | 4 | 1 1/4" | 18" | £666.62 | |
| C | 20UC01 | 24" | 30" | - | - | - | 4 | 1 1/2" | 18" | £818.26 | |
| C | 20UC34 | 24" | 60" | - | - | - | 4 | 1 1/2" | 18" | £997.27 | |
| C | 20UC27 | 24" | 54" | - | - | - | 4 | 1 1/2" | 18" | £942.37 | |
| C | 20UA86 | 24" | 18" | - | - | - | 4 | 1 1/2" | 23 1/2" | £731.05 | |
| C | 20UA92 | 24" | 18" | - | - | - | 12 | 1 1/2" | 54" | £2,012.56 | |
| C | 20UC20 | 24" | 48" | - | - | - | 4 | 1 1/2" | 18" | £887.39 | |
| A | 20UA22 | 24" | 24" | - | - | - | 4 | 1 1/2" | 18" | £807.89 | |
| C | 20UC21 | 30" | 48" | - | - | - | 6 | 1 1/2" | 24" | £1,161.29 | |
| C | 20UC14 | 30" | 42" | - | - | - | 6 | 1 1/2" | 24" | £1,064.34 | |
| A | 20UA24 | 30" | 30" | - | - | - | 6 | 1 1/2" | 24" | £1,029.79 | |
| C | 20UA87 | 30" | 18" | - | - | - | 6 | 1 1/2" | 24" | £938.60 | |
| C | 20UA94 | 30" | 24" | - | - | - | 6 | 1 1/2" | 24" | £964.72 | |
| C | 20UC08 | 30" | 36" | - | - | - | 6 | 1 1/2" | 24" | £1,029.04 | |
| C | 20UC28 | 30" | 54" | - | - | - | 6 | 1 1/2" | 24" | £1,232.41 | |
| B | 5NKH8 | 30" | 30" | 2.203 sq. ft. | 1724 CFM | 2475 CFM | 6 | 1 1/4" | 24" | £911.55 | |
| C | 20UC35 | 30" | 60" | - | - | - | 6 | 1 1/2" | 24" | £1,245.24 | |
| C | 20UC29 | 36" | 54" | - | - | - | 7 | 1 1/2" | 30" | £1,503.09 | |
| C | 20UC02 | 36" | 30" | - | - | - | 7 | 1 1/2" | 30" | £1,142.63 | |
| A | 20UA23 | 36" | 24" | - | - | - | 7 | 1 1/2" | 30" | £1,020.02 | |
| C | 20UC15 | 36" | 42" | - | - | - | 7 | 1 1/2" | 30" | £1,211.88 | |
| A | 20UA29 | 36" | 48" | - | - | - | 7 | 1 1/2" | 30" | £1,299.91 | |
| C | 20UC36 | 36" | 60" | - | - | - | 7 | 1 1/2" | 30" | £1,483.68 | |
| C | 20UA88 | 36" | 18" | - | - | - | 7 | 1 1/2" | 30" | £902.18 | |
| A | 20UA26 | 36" | 36" | - | - | - | 7 | 1 1/2" | 30" | £1,120.23 | |
| B | 5NKH9 | 36" | 36" | 3.667 sq. ft. | 2406 CFM | 3781 CFM | 7 | 1 1/4" | 30" | £1,011.69 | |
| C | 20UA89 | 42" | 18" | - | - | - | 9 | 1 1/2" | 36" | £1,386.96 | |
| C | 20UC30 | 42" | 54" | - | - | - | 9 | 1 1/2" | 36" | £1,760.79 | |
| C | 20UC09 | 42" | 36" | - | - | - | 9 | 1 1/2" | 36" | £1,537.05 | |
| C | 20UC03 | 42" | 30" | - | - | - | 9 | 1 1/2" | 36" | £1,373.02 | |
| C | 20UC23 | 42" | 48" | - | - | - | 9 | 1 1/2" | 36" | £1,631.73 | |
| C | 20UA95 | 42" | 24" | - | - | - | 7 | 1 1/2" | 36" | £1,499.08 | |
| B | 5NKJ0 | 42" | 42" | 5.01 sq. ft. | 3413 CFM | 4875 CFM | 9 | 1 1/4" | 36" | £1,353.29 | |
| E | 20UA28 | 42" | 42" | 5.01 sq. ft. | 5886 CFM | 8417 CFM | 9 | 1 1/2" | 36" | £1,559.68 | |
| C | 20UC37 | 42" | 60" | - | - | - | 9 | 1 1/2" | 36" | £1,855.47 | |
| C | 20UC04 | 48" | 30" | - | - | - | 10 | 1 1/2" | 42" | £1,575.95 | |
| C | 20UA96 | 48" | 24" | - | - | - | 10 | 1 1/2" | 42" | £1,565.70 | |
| A | 20UA27 | 48" | 36" | - | - | - | 10 | 1 1/2" | 42" | £1,568.20 | |
| C | 20UC38 | 48" | 60" | - | - | - | 10 | 1 1/2" | 42" | £1,997.66 | |
| B | 5NKJ1 | 48" | 48" | 7.109 sq. ft. | 5027 CFM | 7219 CFM | 10 | 1 1/4" | 42" | £1,626.92 | |
| C | 20UA90 | 48" | 18" | - | - | - | 10 | 1 1/2" | 42" | £1,501.98 | |
| C | 20UC31 | 48" | 54" | - | - | - | 10 | 1 1/2" | 42" | £1,895.22 | |
| C | 20UC16 | 48" | 42" | - | - | - | 10 | 1 1/2" | 42" | £1,619.49 | |
| A | 20UA30 | 48" | 48" | - | - | - | 10 | 1 1/2" | 42" | £1,759.79 | |
| C | 20UC17 | 54" | 42" | - | - | - | 11 | 1 1/2" | 48" | £2,093.46 | |
| C | 20UC39 | 54" | 60" | - | - | - | 11 | 1 1/2" | 48" | £2,442.64 | |
| C | 20UA91 | 54" | 18" | - | - | - | 11 | 1 1/2" | 48" | £1,905.72 | |
| C | 20UC24 | 54" | 48" | - | - | - | 11 | 1 1/2" | 48" | £2,279.67 | |
| A | 20UA31 | 54" | 54" | - | - | - | 11 | 1 1/2" | 48" | £2,287.53 |
Dayton combination louvers are engineered to secure air intake and exhaust openings from rain and weather while offering superior air flow. These manually managed combination louver dampers feature mill finish, projected aluminium, drainable frame and 45 degree fixed louvers. They come with stable height adjustable width intake louvers that lock firmly into the frame to offer seamless finish and clean appearance. Choose from a range of these combination louver dampers, available in 3, 4, 6, 7, 9 and 10 blade variants.