The Pipe...
HPW delivers DOWLEX 2344 E PE-RT (PolyEthylene of Raised Temperature) pipes. This pipe is fabricated with three layers. The DOWLEX pipes prevent oxygen passing according to DIN 4726 and can be used for water temperatures up to 95 degrees C and a pressure of 6 bar. In addition, pipes also have KOMO certification. It is important to eliminate oxygen from the pipes to prevent corrosion. HPW can deliver pipe with a diameter of 16 x 2.0 in rolls of 90,120,200,500 and 600 metre lengths.  To lay the pipes is easier than ever before with the pipe roll holder trolley which is available at HPW.  UFH can be installed in several different ways. In the first method the concrete floor is covered with pipesulation board. This makes laying the pipe easy and quick. That is than covered with 50 – 75mm of screed. Above this the floor is finished.  The second method is to lay the pipe between joists. First insulation is installed between the joist at a distance of about 30mm below the floorboards. Then pipecliprails are clipped to the insulation. The pipe is than pressed into the cliprails. Floorboards go on top of it all.  The HPW uses specific patterns to lay the pipes. When pipesulation boards are used then the pipes are laid in a snaleshell pattern with a centre-to-centre distance of 100mm. By using 100mm distance we double the output capacity. By using the snaleshell pattern we equally heat up the room. Not like most other makes who lay the pipe going from the left to the right of the room which results in the room heating from left to right.  Second pattern, the combined meander pattern is used between joists. Again at a centre-to-centre distance of 100mm. The combined meander pattern also heats the room gradually.