16" x 12" BA-CDSA Compression Duct Door for Single-Wall Duct
The 16" x 12" BA-CDSA Compression Duct Door for Single-Wall Duct provides an airtight, insulated, high-pressure access point for single-wall sheet metal ductwork.
It's built with dual 20-gauge metal plates sandwiching polyfoam insulation and sealing it with closed-cell neoprene gasketing. This compression-fit assembly secures around the duct opening without needing traditional sheet-metal mounting screws.
Tested to 20" static pressure (S.P.) with minimal leakage, it is available in dedicated configurations for both flat rectangular ductwork and round pipe (4" to 60" diameters).
Why Choose 16" x 12" BA-CDSA Compression Duct Door for Single-Wall Duct?
20" S.P. Certified Seal: Lab-tested to maintain minimal leakage up to 20" static pressure (S.P.), ideal for high-velocity supply and return air systems.
Single-Wall Duct Fit: Sized and configured specifically for single-wall sheet metal ducts.
Insulated Sandwich Construction: Dual 20-gauge metal plates encapsulate polyfoam insulation and feature a closed-cell neoprene gasket to prevent thermal loss and air bypass.
Durable Galvanized Steel: Formed galvanized steel construction resists corrosion and stands up to repeated service.
Thermal Insulation Core: Formed 20-gauge outer plates encapsulate polyfoam insulation and feature a closed-cell neoprene gasket to prevent thermal transfer and condensation.
Specialty Metals Available: Available in specialty metals for demanding or corrosive environments.
Flat and Round Duct Options: Configurations support installation on flat or round duct surfaces.
Wondering whether the BA-CDSA is the right choice for your project? Browse our full list of duct access panels to compare your options.
What Are the Key Product Specifications for the BA-CDSA
Door Size: 16" x 12"
Common Sizes: 8" x 4", 10" x 6", 16" x 12"
Round Duct Compatibility: The 8" × 4" model fits round ducts from 4" to 28" in diameter, while the larger models accommodate ducts from 5" to 30" and 12" to 60", respectively.
Material: Formed galvanized steel (specialty metals available)
Mounting: Compression bolt assembly with spring-loaded sealing system
Duct Type: Single-wall duct
Duct Surface: Flat or round
Fire Rating: Non-rated
Application: Pressurized single-wall duct access
What Comes Standard and What Can Be Configured?
Every BA-CDSA ships with the following as standard:
Formed galvanized steel door and frame
Compression bolt assembly with gasket seal
Configuration for single-wall duct
Flat or round duct fit
Self-adhesive cutout template included.
Configurable:
8 x 4" Model: Galvanized Steel only (Fits 4"28" round or flat).
10" x 6" & 16" x 12" Models: Choice of Galvanized Steel, 304 Stainless Steel, or Aluminum.
The BA-CDSA installs into a cut opening in a single-wall duct, with compression latches drawing the gasketed door tight to the duct wall. Confirm the opening size and duct surface (flat or round) before cutting so the door seals correctly.
Installation Notes
Select the correct profile (Flat or Round) matching your duct surface. (For round ducts, verify pipe diameter falls within range C: 4"28", 5"30", or 12"60").
Apply the included self-adhesive template directly onto the duct wall.
Precision-cut the opening along the template guidelines.
Unthread the polypropylene knobs and separate the inner plate from the outer plate.
Insert the inner plate (with neoprene gasket facing duct interior rim) into the cutout.
Align the outer plate over the exterior studs and hand-tighten the star knobs. Steel compression springs ensure constant sealing pressure against the metal wall.
Who Specifies BA-CDSA and Where Is It Used?
The BA-CDSA is typically specified by mechanical engineers, HVAC contractors, and sheet metal fabricators who need sealed access to a pressurized single-wall duct.
Common applications include:
Commercial HVAC - pressurized duct access
Institutional mechanical systems - sealed duct service
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Frequently Asked Questions About Compression Duct Doors
1. What is a compression duct door?
It is a duct access door that uses compression latches to draw a gasketed door tightly against the duct, creating a leak-resistant seal suited to pressurized air systems.
2. What duct does this model fit?
The BA-CDSA is configured for single-wall sheet metal duct and is available for both flat and round duct surfaces.
Can it be resealed after opening?
Yes. The compression latches allow the door to be opened and resealed repeatedly while maintaining the gasket seal.
3. Is a mounting template included?
Yes, every door ships with a self-adhesive template for easy and accurate duct cut-outs.
4. Why buy duct access doors from Best Access Doors instead of a general marketplace?
Best Access Doors specializes exclusively in access solutions, so you get direct access to product specialists who can confirm sizing, duct surface fit, and options for your application.
Get Sealed Single-Wall Duct Access for Your Project
Reduce the risk of air leakage and difficult service access in pressurized single-wall ductwork. The 16" x 12" BA-CDSA provides a secure, reusable access point for flat or round duct systems, helping maintenance teams reach internal components without compromising the duct seal.
Ready to take the next step? Call +1-888-327-5471 or request a quote now for fast, responsive support from product selection to delivery.
Product Downloads
Spec Sheet
BA-CDSA
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