After heat pumps, fires are most energy efficient, but cost efficiency is hard to measure. SUPPLIED Heat pumps are efficient and convenient. "If you plug anything into the wall it's always 100 per cent energy efficient, which just means it converts all of its electricity into heating output. "The difference is for the consumer, because gas is cheaper per kilowatt, it's cheaper for you to run an 80 per cent efficient gas heater than it is to run a 100 per cent efficient electric heater," he said. CENTRAL HEATING NEW ZEALAND Central heating is becoming more common in New Zealand, but requires significant upfront installation costs.

Source: Stuff June 05, 2019 03:45 UTC