Broughton Industrial Fan Heater IFH15 - 15Kw heat output. If you require a 3-phase heater for medium sized industrial premises such as a warehouse or workshop area this heater is ideal. The IFH15 heater is manufactured in the UK by the British manufacturer Broughton and comes with a 2-year warranty. You will require a 32-amp, 5 pin 3-phase electricity supply to run this heater. Available with or without a mains lead.