A fastener driving device comprising: a housing having an engine receiving portion and a handle portion; a drive engine located in the engine receiving portion, the drive engine comprising a cylinder and a piston reciprocally mounted within the cylinder, the piston comprising a driver configured to move along a drive axis to drive a fastener during a drive stroke; a reservoir at least partially located in the handle portion, the reservoir configured to receive a gas having a pressure greater than atmospheric pressure, the reservoir being in fluid communication with the drive engine; a trigger configured to operate the drive engine; and a dust blower configured to allow gas to be selectively communicated to atmosphere through an outlet in the engine receiving portion of the housing, characterized in that the dust blower is configured to allow gas in the reservoir to be selectively communicated to atmosphere through the outlet and further characterized in that the dust blower comprises: a passageway extending from the reservoir to the outlet in the engine receiving portion of the housing, the passageway at least partially circumnavigating the cylinder of the drive engine, and an actuator configured to selectively open and close the passageway so that when the passageway is open, gas from the reservoir is communicated from the reservoir to the outlet, and when the passageway is closed, the gas from the reservoir is not communicated from the reservoir to the outlet. a housing having an engine receiving portion and a handle portion; a drive engine located in the engine receiving portion, the drive engine comprising a cylinder and a piston reciprocally mounted within the cylinder, the piston comprising a driver configured to move along a drive axis to drive a fastener during a drive stroke; a reservoir at least partially located in the handle portion, the reservoir configured to receive a gas having a pressure greater than atmospheric pressure, the reservoir being in fluid communication with the drive engine; a trigger configured to operate the drive engine; and a dust blower configured to allow gas to be selectively communicated to atmosphere through an outlet in the engine receiving portion of the housing, characterized in that the dust blower is configured to allow gas in the reservoir to be selectively communicated to atmosphere through the outlet and further characterized in that the dust blower comprises: a passageway extending from the reservoir to the outlet in the engine receiving portion of the housing, the passageway at least partially circumnavigating the cylinder of the drive engine, and an actuator configured to selectively open and close the passageway so that when the passageway is open, gas from the reservoir is communicated from the reservoir to the outlet, and when the passageway is closed, the gas from the reservoir is not communicated from the reservoir to the outlet. a passageway extending from the reservoir to the outlet in the engine receiving portion of the housing, the passageway at least partially circumnavigating the cylinder of the drive engine, and an actuator configured to selectively open and close the passageway so that when the passageway is open, gas from the reservoir is communicated from the reservoir to the outlet, and when the passageway is closed, the gas from the reservoir is not communicated from the reservoir to the outlet.