The Environmental Protection Agency (EPA) has a laboratory in Edison, New Jersey that is the site of an alternative energy project. It uses a super ambient solar thermal collector or solar hot water pre-heater for shower facilities in the lab.
Initial investment: $14,448
Payback period: 12 years
Cost savings: $1,237/year
Energy savings: 11,116 kWh/year (at $0.11/kWh)