It is a “waste of time” to debate hydrogen as a home heating option, Ovo’s chief executive has said as the supplier launched what it claims is the market's cheapest heat pump tariff. Under Heat Pump Plus, Ovo is offering a 15p per kWh so called "add on" rate for running the electrified heating devices. The company said this will cut the costs of running a heat pump by 50%. This would make the running costs of a heat pump roughly half of those for a gas boiler, translating into savings of £500 cheaper per annum, it claimed.