Patent ID: 8079834

Claim:
A blower housing comprising: one side of the blower housing that is positioned in a single plane, the single plane of the one side of the blower housing facilitating mounting the one side of the blower housing on a flat surface having a flue opening of a heater with which the blower housing is used; a fan compartment inside the blower housing and positioned directly above the one side of the blower housing for stable support of the fan compartment when the one side of the blower housing is attached to the flat surface of the heater, the fan compartment having an enclosed interior volume; a fan inside the fan compartment interior volume; a motor on the blower housing, the motor being operatively connected to the fan for rotating the fan inside the fan compartment; a dilution compartment inside the blower housing and positioned on the one side of the blower housing, the dilution compartment having an interior volume that communicates with the fan compartment interior volume, the dilution compartment having a side wall that extends around the dilution compartment interior volume and forms a part of the one side of the blower housing, the side wall having a single dilution air intake opening though the side wall communicating the interior volume of the dilution compartment with an exterior environment of the blower housing, the side wall being dimensioned to extend around and be spaced outwardly from the flue opening of the heater when the one side of the blower housing is mounted on the flat surface of the heater whereby the dilution compartment interior volume is dimensioned sufficiently large to enable mixing of exhaust gas received in the dilution compartment interior volume from the flue opening with ambient air received in the dilution compartment interior volume through the dilution air intake opening, the side wall and the one side of the blower housing providing a continuous engagement with the flat surface of the heater around the flue opening when the one side of the blower housing is mounted on the flat surface of the heater whereby ambient air can enter into the dilution compartment interior volume only through the one dilution air intake opening in the side wall; and a circuitry compartment inside the blower housing and positioned on the one side of the blower housing, the circuitry compartment having at least one wall that extends around an interior volume of the circuitry compartment and forms a part of the one side of the blower housing that is positioned in the single plane.