Installed at open-air construction sites, factory perimeters, or rooftop equipment levels, AHU purification unit face challenges such as exposure to the elements, temperature fluctuations, and maintenance difficulties. Nantong Henka Environment Solutions Co.,Ltd. has introduced an insulated filtration housing designed for outdoor installation; featuring robust weather-resistant construction and modular filtration configurations, it provides reliable support for outdoor air handling operations.
Built for outdoor environments with durable construction
The housing features an assembled sheet-metal structure with an exterior spray-painted for corrosion resistance and an internal insulation layer. This design effectively withstands UV radiation, rain, snow, and temperature variations, while the internal insulation helps minimize condensation. Equipped with a standard weather-resistant differential pressure gauge for real-time monitoring of filter load, the unit achieves an IP68 protection rating. Options for base supports and lifting lugs accommodate various installation scenarios, including ground-level, elevated, and confined spaces.

Modular design for easier transport and maintenance
The housing dimensions and flange diameters (e.g., 200mm, 250mm, 400mm, etc) can be customized to meet specific requirements. Featuring a modular structure, the unit can be assembled on-site using rivets, facilitating transport and logistical handling. The top access port is equipped with a quick-release nut mechanism, while the side access door opens wide, providing ample space for filter replacement and internal cleaning.

Designed with a focus on user experience and meticulous attention to detail.
It features a built-in V-BANK filter with high dust-holding capacity, suitable for high-airflow applications. The filter frame is equipped with a dedicated handle so that is is easy for one-handed removal and replacement. A pre-installed port for a differential pressure gauge allows for immediate use. All filters can be quickly accessed via an inspection hatch, facilitating routine maintenance.

It offers stable ground-based support and allows for overhead lifting; both installation methods are straightforward and hassle-free.
The machine features a supportive base and can also be fitted with lifting lugs for overhead installation, depending on operating conditions.

Multi-layer filtration can be configured as needed to remove dust and gaseous pollutants.
Depending on actual operating conditions, you can choose single-stage dust filtration as well as a multi-layer composite filtration system:

Nantong Henka Environment Solutions Co., Ltd. is dedicated to providing adaptable air purification solutions for outdoor equipment. From housing structure to filtration stages, we focus on every aspect of practical operation—ensuring equipment stable operating and simplified maintenance.
Keywords: Duct air purifier, static pressure box air filter, air purification box, outdoor air purification box, air purification box with differential pressure gauge, insulated filter housing for outdoor installation, VT HV HEPA filter.

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