What is a Kerfing tool?
Kerfing tools are designed for hand fabrication of fiberglass duct board to make HVAC ducts out of fiberglass insulation. Kerfing tools contain sharp blades which are run through the interior layer (black side) of the fiberglass board to make grooves or shiplap cuts.
What is P3 ducting?
P3ductal is P3 system for the construction and laying of pre-insulated aluminium ducts for air distribution. P3ductal system is not based on pre-insulated aluminium panels only, but it also consists of accessories, machieries, tools and know-how necessary for the construction and installation in a masterly fashion.
How do you cut fiberglass duct board?
Use straightedge and knife to cut off board and facing at second (far right) line. Cut down to facing (not through it) at next to last staple flap line. Remove groove and staple flap scrap. Clean glass fibers from staple flap.
How do you calculate kerf cuts?
Take the Outside Perimeter of the radius and subtract the Inside Perimeter. This gives the amount of frame to be removed. 2. Divide this amount by the thickness of the saw blade.
What is pre insulated duct?
Pre-insulated ductwork is installed in a single-fix and negates the need for the for the manual lagging process of insulating the ductwork after it has been installed.
How is saw blade kerf measured?
How to measure saw blade kerf?
- Make a cut in the board.
- Be sure not to move the boards at all.
- Measure the thickness of the slot between the two pieces of wood through which the blade had passed.
What is GI ducting?
Most ductwork is constructed of galvanized steel sheet, also known as galvanized sheet metal. It’s the most common material used in fabricating ductwork that prevent rusting and avoid cost of painting. They are also facilitated with sound proofing and high degree insulation.
What is phenolic duct?
Phenolic is a high performing alternative duct material that helps HVAC Contractors increase the thermal and duct leakage efficiency of their systems. Using phenolic also means that there is no need for separate ductwork and separate insulation as it is a 2-in-1 solution that does the job of both.
How do you measure and cut a duct board?
The first cut’s correct measurement equals one half the thickness of the duct board plus the inside width of the finished duct. For example, a 24-inch-wide duct made out of 2-inch-thick duct board has a 25-inch long first cut.