ARC 1800 – NBC / CBRN Filtration System: High-Capacity Air Filtration for Large Protected Facilities
Large civil defence shelters, bunkers and protected infrastructure require ventilation systems capable of supplying significant volumes of filtered air while maintaining positive pressure inside the protected area. The ARC 1800 – NBC / CBRN Filtration System is presented by the manufacturer as a professional air filtration and emergency ventilation system developed for installation in protected facilities. According to the official product information, the system is designed to provide fresh filtered air and create overpressure (positive differential pressure), establishing a toxic-free area (TFA) within the shelter. Atmas Group
Official product page:
Product purpose
According to Shelter-Shop, the ARC 1800 is intended for installation in:
civil defence shelters;
bunkers;
safe rooms;
government facilities;
industrial facilities;
other protected spaces.
The manufacturer states that the system supplies fresh filtered air while maintaining positive differential pressure inside the protected area. This operating principle is intended to help establish a protected environment (toxic free area – TFA) during operation. Atmas Group
CBRN air filtration system
The ARC 1800 belongs to the manufacturer's CBRN (Chemical, Biological, Radiological and Nuclear) filtration system product line.
According to the published description, the system combines air filtration and emergency ventilation functions for protected facilities. It is intended to operate as part of a shelter ventilation installation rather than as a standalone room air purifier. Atmas Group
Operating principle
The manufacturer explains that the ARC 1800 performs two primary functions:
supplying fresh filtered air into the shelter;
creating positive differential pressure inside the protected space.
Maintaining overpressure helps support controlled airflow within the shelter ventilation system. According to the official description, the system is designed specifically for protected facilities where controlled air management is required. Atmas Group
Main technical specifications
The official product page lists the following specifications:
Parameter | Specification |
Airflow (filtration mode) | 1800 m³/h |
Airflow (ventilation mode) | 3600 m³/h |
Electrical supply | 3-phase 400 V AC / optional 240 V AC |
Manual backup | No |
Installation | Floor mounted |
These specifications are published by the manufacturer on the official product page. Atmas Group
Installation
According to the manufacturer, the ARC 1800 is supplied as a floor-mounted filtration and ventilation system.
Unlike smaller ARC models that may offer wall-mounted configurations, the ARC 1800 is specified only as a floor installation version. Atmas Group
Applications
Based on the manufacturer's documentation, the ARC 1800 is suitable for:
large civil defence shelters;
bunkers;
government facilities;
industrial protected facilities;
safe rooms requiring high-capacity air filtration and ventilation.
The product is intended for professional shelter air-management systems requiring high airflow capacity. Atmas Group
Position within the ARC product family
According to the ARC series documentation, the ARC 1800 is one of the highest-capacity systems in the product range.
The published catalogue specifies:
filtration airflow: 1800 m³/h;
ventilation airflow: 3600 m³/h;
maximum shelter volume per system: 1800 m³.
The manufacturer also notes that multiple ARC systems can be installed within a single shelter when greater capacity is required. Atmas Group
Components
The manufacturer's ARC series documentation indicates that ARC systems are designed around multiple integrated ventilation components. Depending on the configuration, these may include:
CBRN filter;
electric blower;
blast valve with prefilter;
silencer and airflow indicator;
airflow control damper;
overpressure blast valve(s).
For larger floor-mounted systems such as the ARC 1800, the published specifications indicate that manual backup is not included. Atmas Group
Conclusion
The ARC 1800 – NBC / CBRN Filtration System is presented by Shelter-Shop as a professional high-capacity air filtration and emergency ventilation system for large protected facilities. According to the manufacturer, the system is designed to provide 1800 m³/h filtration airflow, 3600 m³/h ventilation airflow, operate from a 3-phase 400 V AC power supply (optional 240 V AC), and create positive differential pressure inside protected spaces. The published documentation identifies the ARC 1800 as a floor-mounted solution intended for civil defence shelters, bunkers and other protected infrastructure requiring high-capacity CBRN air management. Atmas Group
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