INSTALL PRE-FILTER BEFORE USE Owner’s Guide For Model Series 50100 • 50150 • 50200 • 50250 • 50300 Air Cleaners T h e S c i e n c e o f C l e a n A i r...Do not use air cleaner where combustible gases or vapors are present. While all the air in a room will not be processed by the air cleaner, the more air circulated through the filter, the more filtered air is returned to the room. Portable air cleaners will be much more effective in rooms where all doors and windows are closed. Refer to “How to Change the Filters” section for proper installation. Model 50100 Series The Honeywell Model 50100 is a 3 speed air cleaner operated by moving the speed control knob on the top panel from the Off (O) position to the High position. Page 5: Filter Replacement Filter Change Calendar The air cleaner model 50100 series is equipped with a Filter Change Calendar wheel which serves as a convenient reminder for you to check and replace the pre-filter and HEPA filter based on the air cleaner’s hours of use.