Since cleaning gutters in Fairfield county Ct. Takes more then an ordinary wet vac, shop vac can't handle the sludge and all the debris that comes from a gutter and using a blower makes a mess and a pressure washer shoots water and mud all over everything and we have plenty of proof gutter guards /covers just don't work. I decided to build something that can handle the leaves and sludge and growths that gutters create. The two key elements with any type of vacuum system is CFM (cubic feet per minute) and Static Pressure (water lift), the type and volume of debris are both factors in balancing the two elements.