Yes, 7500 watts of heating requires 220. cable mine with 83 cables and 40 amplifier switches. This heating draws all 31 bits of high amplifier. My garage is 24 x 24 with insulation in ceiling pants.

For example, a room is usually in a 15 Amp switch. An ambient heating of 1500 watts (in high configuration) attracts 12.5 Amp. When some lights or a TV are in the same circuit, the 15 Amp limit is reached quickly and the switch is kneeling.

A 1500 watt ambient heater (in high configuration) designs 12.5 amps. When some lights or a TV are in the same circuit, the limit of 15 amps is reached quickly and the switch is kneeling.

An environmental heater of 1500 watts (in high configuration) draws 12.5 amps. When some lights or a TV are on the same circuit, the limit of 15 amps is reached quickly and the switch is switched off.

A water heater of this type is necessary to be considered a continuous load, or that means that the branch circuit must be calculated in 125 of the evaluated ampacità heaters. 450240 18.75 amperes, will work in an OCPD of 20 amperes, but, 18.75125 23.4 amperes, requires a circuit of 25 or 30 amperes.