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HVAC
ROUND GRILLE CEILING
DIFFUSER
Made from high impact polymers and featuring
a virtually airtight damper for winter shut off
and/or volume control.
Duct Sizes: 6” 7” 8”
Max Ceiling Thickness: 1.25”
Strap Included: Y
Integral Damper: Y
Required Hole Diameter: 9.25”
AK Factor: .33
Locke#
L8158
MV360 Round Ceiling Diffuser
16 (W) CEILING DIFFUSERS
• Round
• Step down
Locke#
L2220
6" Round Ceiling Diffuser
L2221
8" Round Ceiling Diffuser
L2222
10" Round Ceiling Diffuser
L2223
12" Round Ceiling Diffuser
4-WAy GRILLE/DAMPER/
BOX
For 6", 7" & 8" duct
A B C D E F G
11¼" 9¼" 3/4" 1
a
" 3¼" 5¼" 7¼"
Locke#
L8156
MV4 4-Way Grille/Damper/Box
SPIRAL PIPE DIFFUSER
• Transition box style spiral mount diffuser
• Nylon bushings for easy adjustment
• All blades adjustable
• Available in 8" thru 30" spiral diameters
(Note: Spiral diameter must be 4" larger
than register width)
• Soft White
• Double deflection diffuser
• Front blades are parallel to shortest
dimension
• Back blades are parallel to longest
dimension
• Allows 4-way airflow adjustment
Locke#
L2688
SD34-14X4G-8 Galvanized
L2689
SD34-14X4G-10 Galvanized
L2690
SD34-14X4G-12 Galvanized
L2691
SD34-14X4G-14 Galvanized
L2692
SD34-14X4G-16 Galvanized
L3740
SD34-14X8G-12 Galvanized
L3741
SD34-14X8G-14 Galvanized
L3742
SD34-14X8G-16 Galvanized
L3743
SD34-14X8G-18 Galvanized
DOUBLE DEFLECTION
UNIVERSAL SPIRAL DUCT
DIFFUSERS
• Extruded aluminum construction
• Two rows of individually adjustable blades
for horizontal and vertical deflection control
• Counter-sunk screw holes
• Fits duct sizes 6" on up, based on diffuser
height
• Bright White and Satin Anodized finishes
Locke#
L2438
USVH1-10x4-SA 10x4"
L2439
USVH1-10x6-SA 10x6"
L2440
USVH1-12x4-SA 12x4"
L2441
USVH1-12x6-SA 12x6"
L2442
USVH1-14x4-SA 14x4"
L2443
USVH1-14X6-SA 14x6"
DAMPERS & CEILING DIFFUSERS
#5400 COLLARS
Locke#
L2196
5408 8" Collar
L2197
5410 10" Collar
L2198
5412 12" Collar
3800 DAMPERS
Locke#
L2200
3806 6" Diameter Damper
L2201
3808 8" Diameter Damper
L2202
3810 10" Diameter Damper
L2203
3812 12" Diameter Damper
L2204
3814 14" Diameter Damper
BUTTERFLy DAMPERS
Locke#
L2215
12
6" Round Damper
L2216
12
8" Round Damper
L2217
12
10" Round Damper
L2218
12
12" Round Damper
ROUND DAMPER
Features coated steel construction and 2
butterfly style blades.
Locke#
L1932
6" Damper
L1933
8" Damper
L1934
10" Damper
L1935
12" Damper
L1936
14" Damper