Soffit vent apparatus

A soffit vent apparatus for venting gases from an enclosure to the external environment, comprising:

• a cover comprising an air-permeable portion and a mounting flange, said cover being mountable to a soffit;
• a duct mountable to said cover in communication with said air-permeable portion and operatively coupleable to said enclosure;
• and
• a valve mounted in said duct. said valve having a closed position and being biased to said closed position, wherein said valve may be opened by gases under pressure flowing through said duct to said external environment.

A soffit vent apparatus for venting gases from an enclosure to the external environment, comprising:

• a cover comprising an air-permeable portion and a mounting flange, said cover being mountable to a soffit;
• a duct, substantially circular in cross-section, comprising an upstream section and a downstream section, said upstream section being of smaller cross-sectional area then said downstream section and in operative communication therewith, said duct being mountable to said cover in communication with said air-permeable portion and operatively coupleable to said enclosure;
• conduit size adaption means comprising said upstream section and said downstream section in combination;
• a valve mounted in said duct, said valve comprising a valve barrier comprising a substantially elliptical plate pivotally mounted in said downstream section, said plate being pivotable between a closed position and an open position, said plate being diagonally positioned within said downstream section in said closed position and shaped so as to substantially block said downstream section when in said closed position and so as to allow gas to flow through said downstream section when in the open position, said plate having a short arm and a long arm and a counterweight attached to said short arm, said plate being weighted such that when the duct is oriented substantially vertically the plate is biased to said closed position by gravity and may be moved to said open position by gases at a predetermined pressure flowing to the external environment through the duct;
• closed position stop means comprising the wall of said duct for allowing said plate to rest at said closed position;
• open position stop means comprising said cover for stopping said plate at said open position.

A soffit vent apparatus for venting gases from an enclosure to the external environment, comprising:

• a cover comprising an air-permeable portion and a mounting flange, said cover being mountable to a soffit, said cover further comprising wooden-soffit-mounting means and plastic-or-metal-soffit-mounting means;
• a duct snappably mountable to said cover in communication with said air-permeable portion and operatively coupleable to said enclosure, said duct comprising an upstream section and downstream section, said upstream section being of smaller cross-sectional area than said downstream section, said upstream section and downstream section being substantially cylindrical and co-axial;
• a lip adjacent to the downstream edge of said duct, and a plurality of lip clamps attached to said cover and positioned so as to be clampable on said lip;
• conduit size adaption means comprising said upstream section and said downstream section in combination;
• a valve mounted in said duct comprising a valve barrier comprising a substantially elliptical plate pivotally mounted in said downstream section, said plate being pivotable between a closed position and an open position, said plate being diagonally positioned within said downstream section in said closed position and shaped so as to substantially block said downstream section when in the closed position and so as to allow gas to flow through said downstream section when in the open position, said plate having a short arm and a long arm and a counterweight attached to said short arm, said plate being weighted such that when the duct is oriented substantially vertically the plate is biased to said closed position by gravity and may be moved to said open position by gases under a predetermined pressure flowing to the external environment through the duct;
• closed position stop means for allowing said plate to rest at said closed position, comprising the wall of said duct;
• open position stop means for stopping said plate at said open position, comprising said cover.