Duct work is connected to the earth tube located outside (164 ft long x 15 inches in diameter and 13 ft below ground) and brings fresh air into the MEGA House after it gets filtered through the nano-air filter. (Photo by Mignon O’Young)

Duct work is connected to the earth tube located outside (164 ft long x 15 inches in diameter and 13 ft below ground) and brings fresh air into the MEGA House after it gets filtered through the nano-air filter. (Photo by Mignon O’Young)

Duct work is connected to the earth tube located outside (164 ft long x 15 inches in diameter and 13 ft below ground) and brings fresh air into the MEGA House after it gets filtered through the nano-air filter. (Photo by Mignon O’Young)