1. SEL Environmental Ltd., Canal House, Bonsall St., Blackburn BB24DD, U.K.
2. Enpauly Research Ltd., Coventry CV6 3DR, U.K.
3. Coventry Univ., School of Energy, Construction and Environment, Priory St., Coventry CV15FB, U.K.
4. Coventry Univ., Centre for Low Impact Buildings Research, Priory St., Coventry CV15FB, U.K.