Product Description? Tank capacity refers to actual tank volume and does not reflect capacity available during operation.? Peak Horsepower” (PHP) is a term used in the wet/dry vacuum industry for consumer comparison purposes. It does not denote the operational horsepower of a wet/dry vacuum but rather the horsepower output of a motor, including the motor��s inertial contribution, achieved in laboratory testing. In actual use, motors do not operate at the peak horsepower shown. Specially Designed for Ash Cleaning: 4-gallon, 4 peak horsepower ash vacuum is the ideal tool for cleaning up ash. Ideal for use in fire places, bonfire pits, wood-burning stoves, and more. Strong Suction High Performance: 4 peak horsepower motor provides powerful suction for quickly cleaning. 4-gallon metal tank designed for durability and long cleaning times. Easy to Clean: Equipped with a cartridge filter and pre-filter, the 2-stage filter effectively traps dust and ash grains and prevents them from escaping back into the air. Friendly Convenient: The machine is safer to use when dealing with ash. The metal body is designed to cope with hot ash. The lightweight and compact design with a sturdy handle for easy carrying.