Custom-Fabricated Concentric Diffuser Boxes for Rooftop HVAC Systems
Gainesville Sheet Metal manufactures custom concentric diffuser boxes designed for commercial HVAC and rooftop air-handling applications. These assemblies provide a practical way to distribute supply air and collect return air through a common ceiling-mounted unit, helping simplify the connection between rooftop HVAC equipment and the conditioned space below.
Our concentric diffuser boxes can be fabricated to accommodate the dimensions, duct connections, diffuser configuration, and project requirements of your HVAC system. Whether your project calls for a standard configuration or a custom-fabricated assembly, Gainesville Sheet Metal can provide a sheet metal solution built around your application.
What Is a Concentric Diffuser Box?
A concentric diffuser box is designed to connect rooftop HVAC equipment to the occupied space below while incorporating both supply-air distribution and return-air collection into one assembly.
Supply air travels from the rooftop HVAC unit through the duct connection and into the diffuser box, where it is distributed horizontally into the room through the ceiling diffuser, grille, or louver. Return air is collected through the center return-air opening and directed back toward the HVAC equipment.
This configuration can provide an efficient solution for installations where rooftop equipment is located directly above the conditioned space.
Custom Concentric Diffuser Fabrication
Every HVAC installation can have different dimensions and connection requirements. Roof curbs, duct openings, ceiling heights, equipment locations, and diffuser layouts can all affect the design of the finished assembly.
Gainesville Sheet Metal can fabricate concentric diffuser boxes to meet the specific requirements of your project. We can work from HVAC drawings, equipment specifications, dimensions, or project plans to produce a custom-fabricated assembly.
Our sheet metal fabrication capabilities allow us to produce the box, transitions, duct connections, and other components required for your installation.
Concentric Diffuser Box Configurations
We can fabricate concentric diffuser assemblies in configurations designed around the requirements of your HVAC system and ceiling layout.
Flush-Mount Diffusers
Flush-mount diffuser configurations provide a clean, finished appearance at the ceiling while allowing supply air to distribute into the occupied space.
This style can be a good choice for commercial spaces where the diffuser needs to integrate neatly into the ceiling system.
Grille Diffusers
Concentric diffuser boxes can be fabricated with grille-style supply-air outlets. Grilles can provide flexibility in how air is distributed throughout the space and can be incorporated into a variety of commercial HVAC applications.
Drum Louvers
Drum louvers provide directional control of supply air and can be used where the airflow needs to be directed toward specific areas of the space.
Multi-Way Air Distribution
Depending on the project requirements, diffuser configurations can be designed to distribute supply air in multiple directions. This allows the air distribution pattern to be matched to the room layout and HVAC application.
Hard Duct & Flexible Duct Connections
Concentric diffuser boxes can be configured to accommodate different duct connection requirements.
Hard Duct Connections
For installations using rectangular or other rigid ductwork, we can fabricate the appropriate sheet metal connections and transitions to connect the diffuser box to the HVAC equipment and duct system.
Flexible Duct Connections
Where flexible duct is being used, the diffuser box can be configured with connections appropriate for the installation. This can provide flexibility when routing ductwork through ceiling spaces or around existing building components.
Supply & Return Air in One Assembly
One of the primary advantages of a concentric diffuser box is the ability to combine supply and return air functions within a single assembly.
Supply air is directed outward through the diffuser or grille, while return air is drawn back through the center return opening. This can help simplify the overall HVAC layout and provide a clean ceiling installation.
The specific configuration of the supply and return openings can be customized according to the HVAC equipment and project specifications.
Insulated Concentric Diffuser Boxes
Insulation can be incorporated into concentric diffuser box construction where the project requires it.
Insulated construction can help address temperature control, condensation, and sound considerations within the assembly. The appropriate insulation type and thickness can be determined based on the requirements of the HVAC system and project specifications.
Return Air Filters & Dampers
Additional components can be incorporated into a concentric diffuser box when required by the application.
Depending on the design, options may include return-air filter sections and dampers for adjusting supply-air distribution. These features can provide additional flexibility for balancing and maintaining the HVAC system.
Specific options and configurations can be determined based on the equipment, drawings, and requirements of each project.
Designed Around Your HVAC Equipment
A concentric diffuser box needs to work with the rooftop equipment, roof curb, duct connections, and ceiling layout. Because equipment dimensions and project conditions can vary, a custom-fabricated assembly can be an important part of getting the right fit.
Gainesville Sheet Metal can work with HVAC contractors, mechanical contractors, engineers, and project managers to fabricate components based on the project's drawings and specifications.
Our goal is to provide a finished sheet metal assembly that is designed around the actual requirements of the installation.
Custom Sheet Metal Fabrication
Gainesville Sheet Metal has been providing custom sheet metal fabrication since 1981. Our in-house capabilities include CNC plasma cutting, shearing, brake forming, rolling, soldering, and welding.
These capabilities allow us to fabricate concentric diffuser boxes and related HVAC components in a variety of sizes, shapes, materials, and configurations.
From a straightforward diffuser box to a more specialized assembly requiring custom transitions, openings, insulation, or connections, we can fabricate the components required for your project.
Quality HVAC Fabrication in North Texas
Gainesville Sheet Metal serves HVAC contractors, mechanical contractors, commercial builders, manufacturers, and other customers throughout North Texas and Southern Oklahoma.
Our experience with custom ductwork and sheet metal fabrication gives us the ability to work with a wide range of HVAC components and project requirements.
Whether you need a concentric diffuser box for a new rooftop unit, a replacement assembly, or a custom solution for an existing installation, we can help.
Need a Custom Concentric Diffuser Box?
If you need concentric diffuser boxes for your next commercial HVAC project, Gainesville Sheet Metal can help with custom fabrication based on your equipment specifications, drawings, and installation requirements.
Contact us with your project details, dimensions, HVAC equipment information, or plans. Our team can help determine the appropriate fabrication and configuration for your application.
