... tube is3, the length of heater tubes is 58cm, the voltage input is 230v, the powwer output is 2400w, the distance from panes is 45 ... -50cm, the ground as is 10 ... heater tubes is 58cm, the voltage input is 230v, the powwer output is 2400w, the distance from panes is 45-50cm, the ground as is 10 ...