Abstract: A stable blower for use primarily with an inflatable structure is disclosed. In one embodiment, the drive axle for the blower's impeller is aligned substantially vertically thereby making it more stable. The inlet and outlet to the blower can be substantially similarly so as to allow the blower to assist with deflation of the inflatable structure by reversing the connection of the blower to the inflatable structure. In another disclosed embodiment, the outlet is aligned substantially vertically so as to allow the blower to be positioned at the base of a leg of a freestanding inflatable structure. The blower's frame can have a domed or a substantially planar top. A two-part impeller with a related conus assembly is also disclosed.