Quick Answer
Yes, you can use the BDS MK20 Aerosol Fire Suppression indoors for small, contained fires, but you must ventilate the area immediately after discharge. It is not a substitute for a full-sized extinguisher in large or spreading fires.
How the MK20 Discharge Affects Indoor Air
The BDS MK20 releases a dense aerosol that quickly knocks down flames, but that cloud lingers in enclosed spaces. After use, the agent can reduce visibility and may irritate eyes or airways if you stay in the room.
Because the MK20 is designed for tactical scenarios like molotov protection or small vehicle fires, indoor use is practical only when you can exit or open windows right after discharge. Plan your escape route before you pull the pin.
When Indoor Use Makes Sense
The MK20 fits situations where a small fire starts in a trash can, a stove, or a small appliance and you need to knock it down fast. Its finger-loop design lets you deploy it with one hand, which helps if you are also moving people out.
For larger room fires or anything spreading toward a ceiling, do not rely on the MK20. Step out, close the door, and call emergency services. The MK20 is a first-response tool, not a replacement for a residential extinguisher.
Indoor Use Diagnosis: Symptom, Cause, Action
- Symptom: A small fire starts indoors—trash can, stove, or appliance—and you need to put it out quickly.
- Likely Cause: The fire is contained and not spreading, but you are unsure if an aerosol suppressant is safe to use in a closed room. Check that the fire is smaller than a trash can and not producing heavy smoke that fills the room.
- Corrective Action: Aim the MK20 at the base of the flames, discharge in short bursts, and leave the room immediately after the fire is out. Open windows and doors to ventilate before re-entering. Keep a clear exit behind you while you deploy the MK20.
- Stop or Choose Another Option: If the fire spreads beyond its original container, reaches the ceiling, or you cannot see an exit, stop using the MK20. Evacuate, close the door, and call emergency services. For routine home or office protection, consider a standard multi-purpose extinguisher instead. The MK20 is a tactical tool, not a home extinguisher replacement.
Product Spotlight
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BDS MK20 Aerosol Fire Suppression: The BDS40 MK20 offers the largest capacity in the MK series for longer continuous application. Larger capacity means more discharge time, which helps when you need to cover a small room fire without reloading.
BDS MK20 Aerosol Fire Suppression