Fire Exposed Duct System

FEDS® ver. 2025-01



The program calculates according to the SWEDISH STANDARD SS-EN ISO 12241:2022 "Thermal insulation for building equipment and industrial installations – Calculation rules (ISO 12241:2022)" but with the addition that the program also considers internal radiation, Lund University, 2017, Report TVIT-17/7102. Altogether, this makes the program the only one on the market capable of calculating heat transfer in ventilation ducts and pipes under fire conditions.