AFU 36 — NBC / CBRN Filter for Protective Shelters and Air Filtration Systems

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Introduction

The AFU 36 NBC / CBRN filter is an advanced filtration component designed for use in air filtration and ventilation systems installed in safe rooms, residential shelters, bunkers, containers and other protected spaces.

NBC / CBRN refers to nuclear, biological and chemical threats, with CBRN explicitly covering chemical, biological, radiological and nuclear hazards. The AFU 36 is designed to operate as part of a CBRN filtration system, providing a dedicated filtration component for installations intended to supply filtered air to protected spaces.

According to the product description, the AFU 36 is a standard filter for the SAFE 360 system. It can also be integrated into other types of CBRN filtration systems, subject to system compatibility.

The product is available through Shelter Shop:

Official product page: AFU 36 — NBC / CBRN Filter

Application in Protective Shelters

The AFU 36 is intended for use in air filtration and ventilation systems serving a range of protected environments.

Its stated applications include:

Safe rooms: protected indoor spaces equipped with air filtration systems.
Residential shelters: shelter installations requiring filtered air supply.
Bunkers: protected facilities incorporating ventilation and filtration equipment.
Containers: installations where CBRN filtration systems are integrated into the protected space.
Other facilities: applications using compatible CBRN air filtration systems.

The suitability of a filter for a specific installation depends on the configuration and requirements of the complete system.

For further information about protective shelter equipment, see the Shelter Shop product catalogue.

Integration with the SAFE 360 System

The AFU 36 is identified as a standard filter for the SAFE 360 CBRN filtration and ventilation system.

SAFE 360 is designed for smaller protected spaces, including safe rooms, residential shelters, bunkers and containers. Its documented system configuration includes a CBRN filter, an electric blower, a manual backup device, a blast valve with a prefilter, an overpressure valve with an airflow indicator, and associated hoses and connectors. Atmas Group

The AFU 36 serves as the filter component within this system configuration.

According to the AFU 36 product description, the filter can also be integrated into other types of CBRN filtration systems. Such integration should be assessed against the technical requirements and compatibility of the intended system.

Related official resources:

Main Technical Specifications

The AFU 36 product information provides four principal technical specifications.

Parameter	Specification
Product name	AFU 36
Product type	NBC / CBRN filter
Nominal airflow	36 m³/h
Pressure drop at nominal airflow	460 Pa
Mechanical filter efficiency	≥99.995%
Filter weight	7 kg
Standard system	SAFE 360

These values are taken from the supplied product description. No additional technical ratings or performance claims are assumed.

Nominal Airflow: 36 m³/h

The AFU 36 has a specified nominal airflow of 36 cubic metres per hour (36 m³/h).

Nominal airflow is an important parameter when assessing a filter for integration into a ventilation or air filtration system. It should be considered alongside the airflow requirements of the installation and the operating characteristics of the other system components.

For comparison, the published SAFE 360 system specifications identify an airflow of 36 m³/h in filtration mode and 54 m³/h in ventilation mode. These are system-level specifications, rather than additional AFU 36 filter ratings. Atmas Group

The distinction between filter and system specifications is important when evaluating equipment for a particular shelter.

Pressure Drop at Nominal Airflow: 460 Pa

The specified pressure drop of the AFU 36 is 460 pascals (Pa) at nominal airflow.

Pressure drop is a relevant parameter in filter selection because it describes the pressure difference associated with airflow through the filter under the stated operating condition.

When integrating the AFU 36 into a CBRN filtration system, this specification should be considered together with the characteristics of the blower and the other components in the airflow path.

The published figure applies to the filter's stated nominal airflow condition. No additional operating points or pressure-drop values are provided in the supplied product information.

Mechanical Filter Efficiency: ≥99.995%

The AFU 36 has a specified mechanical filter efficiency of at least 99.995%.

This is the mechanical filtration efficiency stated in the product specifications.

The supplied AFU 36 description does not identify the test method, particle size, or specific testing conditions associated with this figure. Accordingly, the value is presented as published, without assigning an additional classification or claiming performance under unspecified test conditions.

For CBRN shelter applications, the filter should be considered as part of the complete filtration system rather than as an isolated component. The overall installation and its suitability for a particular protective application depend on the relevant system configuration and requirements.

Additional information about CBRN filtration equipment is available in the

Atmas Group CBRN / NBC filter catalogue. Atmas Group

Filter Weight: 7 kg

The specified weight of the AFU 36 is 7 kg.

Weight is a practical consideration when planning the handling, installation and integration of filtration components. The published figure provides the stated filter weight for technical assessment and installation planning.

No additional dimensions or mounting requirements are specified in the product information provided for this article.

Selecting a CBRN Filtration System

The AFU 36 is designed for SAFE 360 systems and may also be integrated into other CBRN filtration systems.

When assessing the filter for a particular application, the following published parameters provide a starting point:

Nominal airflow: 36 m³/h.
Pressure drop at nominal airflow: 460 Pa.
Mechanical filter efficiency: ≥99.995%.
Filter weight: 7 kg.
System compatibility: standard filter for SAFE 360, with potential integration into other CBRN filtration systems.

The filter's nominal airflow should not be treated as a standalone measure of the capacity of the complete shelter or ventilation installation. The requirements of the protected space and the characteristics of the complete system must also be considered.

For additional information about system options and equipment selection, consult the Atmas Group CBRN / NBC filtration systems overview.

Conclusion

The AFU 36 NBC / CBRN filter is a filtration component designed for air filtration and ventilation systems serving safe rooms, residential shelters, bunkers, containers and other facilities.

Its published technical characteristics are:

Nominal airflow: 36 m³/h
Pressure drop at nominal airflow: 460 Pa
Mechanical filter efficiency: ≥99.995%
Weight: 7 kg

The AFU 36 is specified as a standard filter for the SAFE 360 system and can also be integrated into other types of CBRN filtration systems, subject to compatibility.

For full product details and purchasing information, visit the official Shelter Shop website.