The FILTER BOSS was designed to allow two filters to be installed, one online filter and one offline filter with a monitoring system and an integral pump system. The offline filter will be readily available when the online filter starts to clog, a crew member can select the filter by switching levers. A built in vacuum gage allows the crew to monitor the condition of the online filter. Additionally, the integral vacuum switch allows for the installation of a remote warning light. When the crew sees the filter start (more)