Surface cleaning apparatus

A surface treatment apparatus comprising:

• an air flow path extending from a dirty air inlet to a clean air outlet;
• a main body comprising a front end, a rear end, and a suction motor provided in the air flow path;
• a cyclone bin assembly provided in the air flow path, the cyclone bin assembly being removably mountable to the main body;
• a pre-motor filter chamber including:
• a recessed region defined in the main body, the recessed region having a rear wall and a sidewall extending from the rear wall;
• and
• an openable front wall opposite the rear wall, the openable front wall enclosing the recessed region such that, when the cyclone bin assembly is removed from the main body, the pre-motor filter chamber remains enclosed;
• and
• wherein, when the cyclone bin assembly is mounted on the main body, the pre-motor filter chamber is disposed longitudinally between the cyclone bin assembly and the suction motor and the cyclone bin assembly is positioned in front of at least a portion of the openable front wall of the pre-motor filter chamber.