If I said up to 500% efficient, would you believe me? Yes that’s right. Depending on individual circumstances savings can be that high. On average though operating costs with ECONAR heat pumps are about 75% less than electric heating devices and 50% less than air source heat pumps. Cooling costs are 25% - 50% lower when compared to conventional air conditioners. In addition, because hot water is supplied by the heat pump at these efficiencies and higher, your overall savings are increased even more.