Quaschnig, V.: Renewable Energy and Climate Change, John Wiley & Sons, Chichester 2010 Duffie, J.A., Beckman, W.A.: Solar engineering of thermal processes. John Wiley & Sons New York 1991 Werner Weiss: Solar Heating Systems for Houses – A design Handbook for sola combisystems, James & James 2003 Solar Heating – Design and Installation Guide - CIBSE Domestic Services Panel 2007 Planning and Installing Solar Thermal Systems – A guide for installers, architects and engineers- Earthscane 2005 »

Active solar surface: m² The specific collector parameters are not usually related to the gross surface area but to the active solar surface, derived from the testing centre reports. Depending on the testing centre, the active solar surface of flat plate collectors is either the absorber area or the → aperture area. With evacuated tube collectors (e.g. with mirror constructions and vertically-standing absorbers), the active solar surface is often a purely theoretical value. »