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The DMH4-0400 is the factory replacement long-life HEPA filter
Typically installed on a furnace return plenum but can also be used as a stand-alone unit
and light gases
Typically replaced every 3-4 months
DM900-1003 mj brunin The DMH4-0400 is the factoryThe DM900 1003 is a complete maintenance kit that contains: (4) DM900 0855 Carbon Prefilters, (1) DMH4 0400 HEPA Filter, (2) DM900 0191 UVC lamps, (1) DM900 0450 PCO filter, and (2) Carbon Potassium Permanganate Filters. (Same as DM900 41212 kit)
