Is there a Renewable Energy Giant in your Home?

A reverse cycle air-conditioner is a heat pump that can keep you: cool in the summer, and warm in the winter. When used as a heater on a cold day, heat pumps draw heat from the cold outside air and pump it into your house.  Modern heat pumps do this very efficiently.  As heaters, they can: use one unit of energy to run electric pumps and fans, and deliver from 3 to 6  units of energy to  warm the air in your house, energy gathered from the sun-warmed but cold-feeling air outside your house. You get lots of energy by using a little energy.  That’s super efficiency. You can have the electricity powering the heat pump come from renewables by buying accredited Green Power or using your own rooftop solar panels.   This post is mostly presentation slides created by Tim Forcey, a BZE author, energy advisor, and author of many publications on this topic. It is about heat pumps, including: how they work, how much cheaper they can be compared with gas heating, links to further reading, and several case studies.   Why is this presentation needed? 1).  Save money! Many Australians are unaware that when they installed a reverse-cycle air conditioner to keep their home cool during a few days in summer, they also installed a space-heater than can heat their home more cheaply than gas for months-on-end in winter. 2).  Heat with renewable energy! Many Australians don’t realise that the heat coming out of a reverse-cycle air conditioner (known elsewhere in the world as a heat pump) can be from 50% to 100% renewable energy.    Overseas, reverse-cycle air conditioners...

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