http://www.inhabitat.com/2009/03/23/the-ecodrain-cuts-water-
heater-use-by-40/ The EcoDrain: heat exchanger to capture the wasted heat (not water!) that goes down the plughole. 09:34
http://www.inhabitat.com/2009/03/23/the-ecodrain-cuts-water-
heater-use-by-40/ The EcoDrain: heat exchanger to capture the wasted heat (not water!) that goes down the plughole. 09:34