This video tutorial demonstrates how to construct a custom plenum box using basic hand tools. It begins with measuring the opening and cutting metal sheets, followed by creating cross breaks for rigidity. The instructor recommends a tool for clean cross breaks and explains the bending and assembly process, emphasizing the use of S-Lock for secure connections. The video concludes with final assembly steps and inspection, ensuring the box is solid and ready for use.

What are the initial dimensions of the opening for the plenum box?

• 13 by 15 inches

• 11 by 13.5 inches

• 10 by 12 inches

• 12 by 14 inches

How many pieces will the plenum box be made of, including the lid?

• Three

• Four

• Six

• Five

On which side of the sheet metal is a one-inch lip not bent?

• 11-inch side

• None of the above

• 13.5-inch side

• 20-inch side

What tool is recommended for making clean cross breaks?

• Hammer

• Folding bar

• Bulldog cutters

• Screen installation tool

What is the purpose of cross breaks in the sheet metal?

• To reduce the weight

• To make it look better

• To add rigidity and prevent popping

• To make it easier to cut

What is the shape of the S-lock used in the assembly?

• U

• L

• T

• S

Why is it important to keep the S-lock about one inch from the top and bottom?

• To make it easier to cut

• To save material

• To ensure proper alignment with the lid and bottom

• To reduce weight

What should you do if the corners of the S-lock are pinched in from cutting?

• Use a flathead screwdriver to twist open the corners

• Cut new S-locks

• Use a hammer to flatten them

• Ignore it and proceed

When installing the lid, where should the one-inch lip be turned?

• Downwards

• Upwards

• Outwards

• Inwards

What is the final step after installing the lid?

• Testing the box with the blower

• Painting the box

• Inspecting all S-locks and screws

• Adding insulation