Surface cleaning apparatus

A hand vacuum cleaner having a front end having a dirty air inlet, a rear end, an upper end and a lower end, the hand vacuum cleaner comprising:

• (a) an upstream air treatment stage comprising a front end, a rear end, a longitudinal axis extending between the front and rear ends of the upstream air treatment stage and an upstream air treatment chamber having an upstream air treatment chamber air inlet and an upstream air treatment chamber air outlet, wherein dirt is separated in the upstream air treatment chamber from an air stream as the air stream travels from the upstream air treatment chamber air inlet to the upstream air treatment chamber air outlet;
• and,
• (b) a downstream air treatment stage, the downstream air treatment stage comprising a front end, a rear end, a downstream air treatment chamber and a downstream dirt collection chamber that is exterior to the downstream air treatment member, the downstream air treatment chamber comprising a sidewall extending rearwardly from a front end of the downstream air treatment chamber to a rear end of the downstream air treatment chamber with a dirt outlet provided in the sidewall, wherein the air stream passes through the downstream air treatment chamber after passing through the upstream air treatment chamber and additional dirt is separated in downstream air treatment chamber and at least some of the additional dirt is collected in the downstream dirt collection chamber,
• wherein the downstream air treatment chamber is positioned rearward of the upstream air treatment chamber and,
• wherein the dirty air inlet is located at the upper end of the hand vacuum cleaner and,
• when the longitudinal axis extends horizontally with the upper end of the hand vacuum cleaner above the lower end of the hand vacuum cleaner, the downstream dirt collection chamber underlies the upstream air treatment chamber.