M20A1 Simplified Collective Protective Equipment (SCPE)
M20A1 provides a clean-air shelter for use against chemical
and biological warfare agents and radioactive particles.
The M20A1 is an inflatable shelter which allows personnel
to perform duties without wearing individual protective
equipment. The M20A1 provides over 200 square feet of floor
space. If a shelter of more than 200 square feet of floor
space is needed, two or more complete M20A1 SCPE systems
can be joined.
To provide NBC protection, a higher pressure must exist
inside the shelter than outside the shelter. In order to
have clean air in the shelter, the airflow that causes
the pressure must pass through a filter. Since the M20A1
is an overpressure system, small leaks in the shelter liner
will have no effect as long as pressure is maintained inside
When the system is pressurized, almost all airflow into
the shelter will flow from the liner through the protective
entrance to the contaminated exterior. As a result, the
shelter will be supplied with constant clean make-up air.
The motor blower (part of the accessory kit) inflates the
shelter. Vents, between the shelter and the protective
entrance, and vents between the protective entrance and
the outside, are adjusted for the proper pressure inside
the shelter and protective entrance. As a result, clean
air flowing from the shelter to the outside through the
protective entrance purges toxic vapors from the system.
Trailer Mounted Collective Protection
Emergency Medical Support Structures
M20A1 Safe Room
Large Homeland Defense Shelters
Portable Col-Pro Shelter