EasiPipe Rigid Duct 2m Length Diameters Available: 4, 5 and 6 Designed to achieve the highest possible energy efficiency from ventilation appliances. Domus rigid duct is manufactured from exacting tolerances to virtually eliminate air leakage and reduce pressure drop. 4 x 2m Rigid Round Duct Pipe Domus EasiPipe 100 is suitable Bathroom, Toilet and Utility room applications Free Area 7,850mm2 5 x 2m Rigid Round Duct Pipe Domus EasiPipe 125 is suitable for Bathroom, Toilet, Utility room, Kitchen and Whole House Applications. Free Area 12,266mm2 6 x 2m Rigid Round Duct Pipe Domus EasiPipe 150 is suitable for Kitchen, Commercial and Whole House Applications Free area - 17,263mm2