Replacement Air Filter for Sentry Model 400 ULPA Filter

Sentry Air Systems Model 400 ULPA filters provide high quality containment in Model 400 units. 100% fire retardant and handcrafted with specialty purpose fiberglass material.

Efficiency: up to 99.9995% efficiency on particles down to 0.12 microns in size (MERV 20)

In order to filter out harmful particulates and carcinogenic fumes, fume extractors and air purification systems utilize HEPA, ASHRAE, and ULPA to remove these respirable pollutants from the air. Unlike typical filters, high efficiency air filters are made of a complex web of fibers composed of dense glass, and pleated, similar to an accordion, which increases the total surface area and creates lower resistance to air-flow. Due to the lower resistance, these filters are recommended for applications that require high efficiency to remove particulates with a size of less than 0.6 microns.

Air filters are typically standardized by governing boards (NIOSH, EPA, OSHA, etc.) and/or dependent of the application that it is utilized with. In most cases, HEPA | ASHRAE | ULPA filters are recommended in applications where extremely hazardous particles, fumes, and chemicals can pose a threat to the user and/or environment. These filters are rare in form as they become more efficient with the continued use of the air filtration system. This is due to impaction, a process in which particulate that are larger than the spaces between the fibers are trapped in the filter as the air flow is pulled, or pushed, through the system. As the particulates become embedded in the filter, the alloted airflow space between the fibers becomes more clogged, thus, making for a more efficient filter.

Ultra low particulate air (ULPA) filters have efficiency of up to 99.9995% on particles as small as 0.12 microns. ULPA filters have a MERV rating of 20 and are the highest quality filters available. ULPA filters provide better filtration for tobacco smoke, oil smoke, insecticide dust, carbon dust, and even capture some viruses.

ULPA Filter Features

• 100% Fire Retardant
• Unabridged, gasket closed cell neoprene
• Multi-level quality assurance
• Hand crafted with specialty purpose fiberglass material
• Up to 99.9995% efficiency on particles down to 0.12 microns in size.
• MERV 20