Rainwater and Drainage

The Sheffield 1971-2000 average rainfall was 824.7mm http://www.metoffice.gov.uk/climate/uk/averages/19712000/sites/sheffield.html

Grey Water Heat Recovery

 * Heat recovery for showers: http://www.shower-save.com/ -- "the Shower Save can recover over 60% of the energy when you shower" -- this is a 1 storey heat exchange downpipe, they also do shower trays with builtin heat exchanges. Green Building forum discussion on grey water heat recovery

Rainwater Harvesting

 * http://www.rewatec.co.uk/


 * http://www.rainharvesting.co.uk/ especially interesting is their communal system, -- most terraced houses in Sheffield share their drainage with the other houses they share a passageway with.


 * http://www.rainwaterharvesting.co.uk/ Rainwater harvesting systems, rainwater tanks, filters, pumps, flood crates and rainwater management systems


 * http://www.ukrha.org/ The UK Rainwater Harvesting Association (UK-RHA) is a company limited by guarantee, having been formed in 2004 to serve as a focal point for organisations with business interests in the rainwater harvesting industry.


 * http://www.halstedrain.com/ Halsted Rain, UK leaders in the collection and utilisation of rainwater in the urban environment.