Abstract: An apparatus for adding weight to an arrow and a system and method of correcting the trajectory of the arrow with the added weight is disclosed and described. The arrow can include a compensator designed to fit as a sleeve on a shaft of the arrow and the compensator has diameter that is larger than a diameter of the shaft of the arrow. A thickness of the compensator, which is measured as the difference in the diameter of the compensator and the diameter of the shaft of the arrow, is configured to enable a user to aim the arrow with a bow that has been sighted for a standard arrow.

Abstract: An air filter assembly for remodel construction has a housing with a frame configured to seat against a wall and about a cold air return. A grill defining a plurality of louvers and a rim is configured to cover at least a portion of the housing outer surface. The rim extends to a depth no greater than the thickness of the housing outer surface. A filter has a frame configured to receive filtration media, the filter shaped and sized for removable insertion into the slot of the housing.

Abstract: A grill and filter assembly having a replaceable filter element includes a rectangular frame assembly, grill insert and a filter. The rectangular frame assembly has an outer frame forming a face and an outwardly extending wall extension. The grill insert has a plurality of louvers and an outwardly extending filter housing. It also includes a plurality of flanges extending inwardly from the filter housing to a depth of no greater than the thickness of standard drywall. The filter assembly includes a loop covered with a fabric filter material. The loop is capable of flexure and the filter is inserted within the filter housing and under the flanges. A plurality of magnets are attached to the wall extension and located to magnetically hold the grill insert within the frame assembly. The flanges and filter housing are structurally adapted to allow the filter to be flexed and slid from under the flanges to remove it from the grill insert.

Abstract: A grill and filter assembly having a replaceable filter element includes a rectangular frame assembly, grill insert and a filter. The rectangular frame assembly has an outer frame forming a face and an outwardly extending wall extension. The grill insert has a plurality of louvers and an outwardly extending filter housing. It also includes a plurality of flanges extending inwardly from the filter housing to a depth of no greater than the thickness of standard drywall. The filter assembly includes a loop covered with a fabric filter material. The loop is capable of flexure and the filter is inserted within the filter housing and under the flanges. A plurality of magnets are attached to the wall extension and located to magnetically hold the grill insert within the frame assembly. The flanges and filter housing are structurally adapted to allow the filter to be flexed and slid from under the flanges to remove it from the grill insert.