If you need air conditioning in summer and heat in winter, a reverse cycle heat pump seems like a good idea. But, how effective is it compared to a heating only system?  No to Gas Firstly, we should note that we are not considering gas heating. Gas is a fossil fuel and there is simply no way to run gas appliances without greenhouse gas emissions. However, while electricity is in part generated by coal and other fossil fuels, it doesn’t have to be. You can purchase 100% GreenPower or install solar to cover your needs throughout the year and effectively be greenhouse neutral. The economics of gas heating also no…