A modular vacuum system includes a first and second canister of different capacities that are configured to store debris. The modular vacuum system also includes first and second power heads that can be coupled to either the first or second canisters. The first and second power heads operate at different voltages that generate a first and second suction airflow. The first and second canisters store debris separated from the first and second suction airflow. The first and second canisters also store debris separated only from the first suction airflow.