The Custom CoalSAFE model is designed per client recommendations in regards to size, occupancy, entrapment duration and other special features.

Through innovative design, the CoalSAFE is currently the only refuge model on the market to incorporate both a powerless carbon dioxide/carbon monoxide (CO2/CO) scrubber as well as an intrinsically safe air conditioning system (refrigerant R744).

This standalone unit, dubbed the MARCis (MineARC Air Refuge Chamber - Intrinsically Safe), runs on liquid CO2, and is the first of its kind anywhere in the world.

The CoalSAFE is manufactured and tested to the highest industry regulations and guidelines: Approved by the West Virginian Office of Miners Health and Safety and currently the only refuge model in the world built to United States Mine Safety & Health Administration (MSHA) 'Final Rule' 2009 (30CFR §7.503).