[. . . ] [. . . ] Electric: 15-20 working days. *1/2" air vent height excludes air vent F = flow R = return Tube: Horizontal 20mm Vertical 30mm Dual energy option using Yucca valve and long cover plate (Height of short cover plate: 170mm) YMER-180 1st January 2011 39 [. . . ] [. . . ]