Carrying unit for blower assembly

A carrying unit for a source of pressurized air, the carrying unit comprising:

• a frame;
• at least one wheel on the frame through which the frame can be supported upon and moved over a subjacent support surface;
• and
• a pressurized air handling system comprising a conduit assembly on the frame and having an inlet for receiving pressurized air from a source and first and second spaced outlets for discharging pressurized air directed through the inlet,
• the pressurized air handling system further comprising an air control system,
• the air control system changeable selectively into different states, the air control system configured so that by reason of changing states the air control system causes at least one of:
• a) a different volume of air from the inlet to be directed to the first and second outlets;
• and b) a change in a direction of air discharging from one of the outlets.