Thos. Somerville Co.
Skip to main content
Ship
Find a Location
Contact Us
Site Search
submit search
Sign In
Cart (
)
{0} items in cart
menu
Search
Cart
Sign In
Selectors
Copper Selectors
PVC Selectors
Import Black Fitting Selectors
CPVC Selectors
ProPress Selectors
ACR Fittings
HVAC Equipment
Air Handling Units
Commercial Air Handlers
Residential Air Conditioner Air Handlers
Residential Floor Mount Air Handlers
Residential Heat Pump Air Handlers
Residential Wall Mount Air Handlers
Condensers & Air Conditioners
Commercial Air Conditioners Split System
Residential Air Conditioner Split System
Electric Process Heaters
Immersion Wells
Evaporator Coils
Air conditioner Evaporators
Furnaces
Electric Furnaces
Gas Furnaces
Oil Furnaces
Heat Pumps
Commercial Heat Pump Split Systems
Heat Pump Accessories
Heat Pump Electric Heaters
Heat Pump Risers
Residential Heat Pump Split Systems
Heaters
Fan Convectors
Gas Unit Heaters
Patio Heaters
Mini Split Equipment
Mini Split Air Conditioner Indoor Units
Mini Split Air Conditioner Outdoor Units
Mini Split Heat Pump Indoor Units
Mini Split Heat Pump Outdoor Units
Residential Heat Pump Mini Split Systems
Packaged Units
Air Conditioner Packaged Units
Gas Heating/Electric Cooling Pkgd. Units
Heat Pump Packaged Units
Packaged Unit Accessories
Packaged Unit Heaters
Plumbing Hardware
Shower Drains & Accessories
Bathtub Drains
Bathroom Drain Flanges & Accessories
Rough-In Kits
Drain Seals & Covers
Bath Wastes & Overflow
Bathtub Drain Trim Kits
Bathtub Drain Stoppers
Bathtub Drain Parts
Bathtub Drain Face/Overflow Plates
Channel & Tile Drains
Debris Strainers
Shower Drain Accessories
Shower Drain Plates
Shower Drains
Shower Drain Covers
Sink Drains & Fittings
Sink Drain Accessories
Sink Drain Flanges
Bathroom Sink Drains
Sink Drain Rod Assemblies
Sink Drain Traps
Sink Drains
Sink Strainer Baskets
Sink Strainers & Stoppers
Sink Tailpieces & Extension Tubes
Pop-Ups & Accessories
Plumbing Drains & Traps
Bottle Traps
Cleanouts & Cleanout Covers
Drain & Traps Washers
Floor Drain Trap Seals
Floor Drains
Grease Traps
Plumbing Drains & Traps Accessories
Roof Drains
Special Traps
Trap & Supply Covers
Tubular Extensions
Tubular Fittings
Tubular Flush Ells & Slip Ells
Tubular J-Bends
Tubular Offsets
Tubular P-Traps
Tubular S-Traps
Tubular Tailpieces
Waste Bends
Plumbing Specialties
Air Admittance Valves
Closet Bolts
Closet Flanges
Flexible Gas Connectors
Gas Appliance Connectors
Gas Connector Fitting
Plumbing Access Panels
Plumbing Nuts & Washers
Test Caps
Test Plugs and Balls
Trap Primers
Water Connectors
Sewage Tanks & Septic Tanks
Sewage & Septic Tank Accessories
Water Supply Fittings
Ice Maker Fittings
Supply Boxes
Washing Machine Fittings
Water Supply Fitting Accessories
Water Supply Flanges
Water Supply Flexible Hoses
Water Supply Kits
Water Supply Risers
Water Supply Stops
Air Distribution
Dampers
Damper Accessories
Damper Actuators
Duct Dampers
Motorized Dampers
Pressure Relief Dampers
Specialty Dampers
Volume Control Dampers
Ducting
Duct Accessories
Duct Fittings
Duct Plenums
Flexible Ducts
Oval Ducts
Rectangular Ducts
Return Air Products
Round Ducts
Grilles, Registers & Diffusers
Ceiling & Register Boxes & Outlets
Diffusers
Grilles
Registers
More
Home
/
Brands
/
Southwark
/
Air Distribution
/
Grilles, Registers & Diffusers
/
Diffusers
Diffusers
3
items
Filter
Skip to Results
Search Within Brand
Stocked Items
Stocked Items Only
Sort by
Best Match
Product: A to Z
Product: Z to A
Product List View
List
Product Grid View
Grid
Product Table View
Table
Results Per Page
10
20
30
40
First page
Previous page
1
Next page
Last page
content loaded
Compare
Southwark
Southwark 18-1/2X22X16 Plenum Box No Filter, 18-1/2 in L x 22 in W x 16 in H
Part #
1194306
MFG #
18-1/2X22X16
Add to Cart
Compare
Southwark
Southwark 21-1/2X22X18 Plenum Box No Filter, 21-1/2 in L x 22 in W x 18 in H
Part #
1194315
MFG #
SB212218
Add to Cart
Compare
Southwark
Southwark NMB394-18 Plenum Filter Box, 18 in L x 22 in W x 18 in H
Part #
411443
MFG #
NMB394-18
Add to Cart
Compare
Southwark
Southwark 18-1/2X22X16 Plenum Box No Filter, 18-1/2 in L x 22 in W x 16 in H
Part #
1194306
MFG #
18-1/2X22X16
Add to Cart
Compare
Southwark
Southwark 21-1/2X22X18 Plenum Box No Filter, 21-1/2 in L x 22 in W x 18 in H
Part #
1194315
MFG #
SB212218
Add to Cart
Compare
Southwark
Southwark NMB394-18 Plenum Filter Box, 18 in L x 22 in W x 18 in H
Part #
411443
MFG #
NMB394-18
Add to Cart
Sort by
Best Match
Product: A to Z
Product: Z to A
Product List View
List
Product Grid View
Grid
Product Table View
Table
Results Per Page
10
20
30
40
First page
Previous page
1
Next page
Last page
