Purmo’s Delta Laserline Ventil column radiators are manufactured in the same types and sizes, and support the same features as the Delta Laserline radiators. The basic difference is that – in contrast to the Delta Laserline radiators – Delta Laserline Ventils are factory equipped with the valve insert with initial preset. The radiators are to be connected to the hydronic domestic heating system from the bottom, with two connecting stubs with internal diameter G .” and 50 mm spacing (not applicable to the radiators connected via the edge segments). As standard, opposite the valve insert the welded-on cover is positioned, with internal thread G .”, for the comfortable G .” air vent mounting, and below – the same cover also with G .” internal thread, for closing plug mounting.