Ballistic sliding bomb shelter door


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Safe Cell NBC filter in a safe roomA safe room is a protected space that allows multiple people to shelter in place, safely isolated from airborne toxins like radioactive fallout or chemical spill vapors, malicious people, and weather events. You can easily create one in your home or office with a Safe Cell NBC filtration system.

American Safe Room has been designing and manufacturing all of the critical components necessary to construct nuclear, biological, and chemical resistant safe rooms since 2002. We have sold thousands of Safe Cells for use in underground bunkers, safe rooms, nuclear power plants, chemical plants, and other industrial applications - see who uses the Safe Cell here.

We also manufacture equipment for underground shelters like blast doors and hatches, blast valves, and steel ventilation pipes as well as a complete underground shelter kit. Please see for these items.


How to set up a safe room in your home or apartment

Safe room airflowA protected space consisting of a room or several rooms in your home is created by installing a Safe Cell which will filter the air and maintain positive pressure in that space, relative to the outside pressure. This is called overpressure. It ensures that all air is flows outward so that nothing outside can migrate into the space. Any leaks will leak outward. A good place to start planning your protected space is this primer on home and apartment safe rooms.


Why choose the Safe Cell?

NBC air filtration systemsMade in America, we have them in stock for immediate shipment. They come in two sizes rated by air output - 60 cubic feet per minute (CFM) and 120 CFM. According to the US Army Corps of Engineers, each occupant needs five CFM, so the two Safe Cell models will allow for 12 and 24 occupants, respectively. If you anticipate more than that, more than one filter can be installed.

There are critical features that are only found on the Safe Cell. You can't find them in any other filtration system. The Safe Cell also features an impressive collection of government and industrial users.


Easy installation and reliable operation

NBC filter manualThousands of people have installed Safe Cells in their homes and underground shelters. We ship them in nondescript boxes by UPS Ground. Each box has a carton contents label on the inside flap that lists everything in the box and every item in the box is clearly labeled. Box number two will have hard copies of the manuals for all of the parts you ordered. These manuals have step by step instructions for assembly, installation, and operation.

Every product page on this website has a PDF copy of the manual in the right hand column along with the part number, price, and availability:

Filtration systems
60 CFM AC and DC Safe Cell

120 CFM AC and DC Safe Cell
60 CFM AC and DC complete blast protected NBC system
120 CFM AC and DC complete blast protected NBC system
60 CFM DC only Safe Cell

Differential pressure gauge
Overpressure valve
Adjustable overpressure valve
Automatic ventilation blower
Emergency backup hand pump
backup hand crank
Replacement filters

If you have any questions or run into any problems, give us a call or send an e-mail.

Here is a video showing the installation of one of our 60 CFM Safe Cells in an Atlas missile silo. They elected to use blast valves over the ventilation pipes. These are only required in hardened underground shelters, not in above ground safe rooms.

60 CFM Safe Cell installation video


Design criteria

The Safe Cell is a self contained NBC air filter that has been designed to meet the critical specifications laid out by the US Army Corps of Engineers. It features an onboard automatic battery backup system that instantly draws from a user supplied battery if the grid goes down. Once the grid is back up, it automatically switches back to AC power and recharges the battery. No other NBC filter sold in America has this integrated automatic backup system. If the grid stays down and your battery runs out, the optional backup hand pump or the backup hand crank can be used to bring filtered air into your shelter and expel the carbon dioxide and moisture that the occupants exhale.


Know that your shelter is protected from airborne threats

Every bunker built by a government that we know of uses an NBC filter designed to keep the shelter in positive relative pressure (overpressure). The reason for this overpressure is so that you are not relying upon how well your protected space is sealed up. If there are any minor leaks, the air flows outward, keeping out all airborne toxins. The Corps of Engineers considers an overpressure of .3 inches of water gauge a Class 1 protected space. The Safe Cell puts out about three times this amount of pressure and if you do not have any major leaks in your shelter, you will stay above this specification.


Complete protection from nuclear, biological, or chemical threats

The Safe Cell is designed to draw air in through a chemical resistant air intake hose into the bottom end bell that has been designed to diffuse the airflow and hit the entire surface of the pre-filters evenly. After the air goes through the pre-filters it is next drawn through the nuclear grade HEPA filter. This HEPA filter is individually tested (not batch tested) and the results of that test are on a placard right on the filter. Next in line is the carbon adsorber. We use a blend of NUK-TK carbon (optimized for radioactive iodine - a true gas) and ASZM TEDA carbon (optimized for the higher volatility warfare gases). The ASZM TEDA carbon is what the US military uses in their gas masks and collective protection filters and is cannot be shipped outside of the United States without an export licence.



American Safe Room provides free air filtration and component blast protection shelter consultations. Contact our Sales Manager at 541-459-1806 or send a plan view drawing of your shelter to or FAX it to 503-212-6695.