Flue gas extractor arrangement

Abstract

The invention relates to a flue gas extractor arrangement comprising a vertical flue gas duct and a first impeller (51) therein and a motor (50) for rotating it via a rotation shaft (53). The arrangement further comprises a conical flow restrictor (20) and an insulated motor housing (40), which motor housing extends partly to the edge of the flue gas duct, but leaves the flue gas duct partly free to allow by-flow. The motor housing (40) has a second impeller (52) for cooling the motor.