Static Boiler by International Energy Agency This is the boiler used in the simulation of the heating system of a residential building (La Chaumiere). The boiler model is a steady state model. Losses are functions of the operation conditions. Two heat exchanges are considered: the flue gas to water heat transfer and environmental heat losses. Note: Look at the Annex 10 information to find a better description. Ref:IEA ANNEX 17 : BEMS Synthesis Report Univ. of Stuttgart 6-27-92 AN17-880725-01 SCHAUM 2 Revised Specification of Ex. A.1.