This is the whole system including a UPS with 16 deep cycle gel batteries in paralel, 2- Natural Gas fired high efficeint heat pumps, 5- 60 gallon hot water holding tanks and a bunch of labled valves and pipe. This building at 3 floors with 4- 900 Sq Ft 2 bedroom apartments and 1- 400 Sq Ft 1 bedroom apartment will stay heated and have plenty of hot water for about $1000 a year total, that's 4000 Sq Ft for about a $1000 a year
