This, of course will vary greatly depending on individual circumstances, but on average a typical home of 2000 square feet will cost between $14,000 - $18,000. This represents somewhere around double the costs of a conventional heating, cooling and hot water system. When it comes to payback, we at ECONAR often see a 3 – 5 year payback of these additional costs. Then it’s money in the bank from that point on.