Hoods, plenums and cyclones
Extraction hoods, plenum boxes, fan inlet boxes and dust collectors, made from plate to the sizes you give. Each of these opens in the browser with default sizes that already give a verified flat pattern: change them to yours, check the drawing, add seam and flange allowances, and export.
Canopy
An extraction hood: a skirt round a rectangular opening, four sloping sides and a collar for the duct, in the middle or against a wall.
Open CanopyCanopy, Round Collar
An extraction hood for a round duct: a skirt round a rectangular opening, a rectangle-to-round sloping part and a round collar, in the middle or against a wall.
Open Canopy, Round CollarPlenum Box
An open box folded from one blank with a row of round spigots on its back or a side: the box with every hole marked, and the spigots unrolled.
Open Plenum BoxInlet Box Scroll
The scroll of a fan inlet box laid flat: its straight sides and arc unrolled, each line across as deep as the box is there.
Open Inlet Box ScrollCyclone
A cyclone dust collector from its barrel diameter, to Stairmand or Lapple proportions or your own: barrel, cone, roof, inlet duct and gas outlet tube.
Open Cyclone