Dome is inflated. — Dual fans are used, and often dual power sources, to decrease the chance of power loss.  Keeping the air pressure in a dome is the most important factor during dome construction.  These fans are called SC3s

Dome is inflated. — Dual fans are used, and often dual power sources, to decrease the chance of power loss. Keeping the air pressure in a dome is the most important factor during dome construction. These fans are called SC3s