0502025 – JOHNSON BOX
$80.12Johnson Box filter rack, 20×25. Solid metal sides with built-in duct connections — mounts inline or at the air handler. Holds a standard 20×25 filter.
Get air where it needs to go with our full line of air distribution products. We carry air grilles, registers, sheet metal fittings, flexible and rigid ducting, duct fans, B-vent double-wall pipe, and insulation. Whether you’re installing new ductwork, replacing a register, or sealing up leaks, we have the materials and know-how to help.All products available for walk-in pickup at our Dallas store. Need help sizing ductwork or choosing the right register? Our staff can assist. Visit us at 10226 Plano Rd or call (214) 340-9421.
Showing 1–48 of 259 results

Johnson Box filter rack, 20×25. Solid metal sides with built-in duct connections — mounts inline or at the air handler. Holds a standard 20×25 filter.

Rex Rack filter rack, 16×25. Mounts between ductwork and your air handler or furnace for horizontal installations. Holds a standard 16×25 filter. Built-in duct flange.

Rex Rack filter rack, 20×25 with access door on the 20″ side. Mounts between ductwork and your air handler for horizontal installations. Holds a standard 20×25 filter.

13.5″ x 19.5″ x 36″ R6 insulated galvanized plenum. Connects your air handler or cased coil to the ductwork. Lined with fiberglass insulation to reduce noise and sweating.

16.5″ x 11.5″ x 36″ R6 insulated galvanized plenum. Connects your air handler or cased coil to the ductwork. Fiberglass lined to reduce condensation and noise.

16.5″ x 19.5″ x 36″ R6 insulated galvanized plenum. Connects your air handler or cased coil to the ductwork. Fiberglass lined to cut noise and prevent sweating.

16″ x 21″ x 36″ R6 insulated galvanized plenum. Connects your air handler or cased coil to the ductwork. Lined with fiberglass insulation to reduce noise and condensation.

19.5″ x 20″ x 36″ R6 insulated galvanized plenum. Connects your air handler or cased coil to the ductwork. Fiberglass lined to reduce condensation and noise.

20″ x 11.5″ x 36″ R6 insulated galvanized plenum. Connects your air handler or cased coil to the ductwork. Fiberglass lined to reduce condensation and noise.

23.5″ x 11.5″ x 36″ R6 insulated galvanized plenum. Connects your air handler or cased coil to the ductwork. Fiberglass lined to cut noise and prevent sweating.

24″ x 21″ x 36″ R6 insulated galvanized plenum. Connects your air handler or cased coil to the ductwork. Fiberglass lined to reduce condensation and duct noise.

25″ x 22″ x 36″ R6 insulated galvanized plenum. Connects your air handler or cased coil to the ductwork. Fiberglass lined to reduce condensation and noise.

5″ round duct damper with key handle. Controls airflow to individual rooms by opening or closing the damper blade. Galvanized steel.

6″ round duct damper with key handle. Controls airflow to individual rooms by opening or closing the damper blade. Galvanized steel.

7″ round duct damper with key handle. Controls airflow to individual rooms by opening or closing the damper blade. Galvanized steel.

8″ round duct damper with key handle. Controls airflow to individual rooms by opening or closing the damper blade. Galvanized steel.

9″ round duct damper with key handle. Controls airflow to individual rooms by opening or closing the damper blade. Galvanized steel.

10″ round duct damper with key handle. Controls airflow to individual rooms by opening or closing the damper blade. Galvanized steel.

12″ round duct damper with key handle. Controls airflow to individual rooms by opening or closing the damper blade. Galvanized steel.

14″ round duct damper with key handle. Controls airflow to individual rooms by opening or closing the damper blade. Galvanized steel.

16″ round duct damper with key handle. Controls airflow to individual rooms by opening or closing the damper blade. Galvanized steel.

Galvanized duct reducer, 5″ to 4″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 6″ to 4″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 6″ to 5″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 7″ to 5″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 7″ to 6″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 8″ to 6″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 8″ to 7″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 9″ to 7″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 9″ to 8″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 10″ to 8″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 10″ to 9″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 12″ to 9″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 12″ to 10″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 14″ to 10″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 14″ to 12″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 16″ to 12″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

Galvanized duct reducer, 16″ to 14″. Transitions between two different round duct sizes in a supply or return run. Crimped end for easy connection.

12″ round ceiling diffuser with 360-degree airflow. Steel with white powder coat. Mounts in 12″ round duct opening. Great for bedrooms, hallways, and offices.

12-inch ductboard triangle made from insulated fiberboard. Used to form 90-degree turns and transitions in ductboard systems. Fits standard 12″ duct runs.

14-inch ductboard triangle made from insulated fiberboard. Used to form 90-degree turns and transitions in ductboard systems. Fits standard 14″ duct runs.

16-inch ductboard triangle made from insulated fiberboard. Used to form 90-degree turns and transitions in ductboard systems. Fits standard 16″ duct runs.

Uninsulated galvanized register boot, 10×10 opening with 10″ round duct connection. Solid galvanized steel construction for unconditioned spaces or commercial applications.

Insulated galvanized register boot, 10×6 opening with 6″ round duct connection. Internally lined to reduce condensation and noise. Standard residential size.

Insulated galvanized register boot, 10×8 opening with 8″ round duct connection. Internally lined to reduce condensation and noise. Fits standard 10×8 floor or wall registers.

Uninsulated galvanized register boot, 12×12 opening with 12″ round duct connection. Solid galvanized steel construction for unconditioned spaces or commercial applications.

Insulated register boot with ductboard top — 12×6 register opening, no pre-cut hole. Cut your own duct opening on-site to match any round duct size. Galvanized steel.

Insulated register boot with solid metal top — 12×6 register opening, 9″ tall, no pre-cut hole. Cut your own duct opening on-site. Galvanized steel construction.