FLOOR HEATING AND COOLING
Why REVEL-PEX floor heating?
- affordable price
- long working life (more than 50 years)
- 25 years warranty
- easy installation
- low heat and head loss
- free software
The system is also used for large-area heating or cooling. The pipe with dimensions of 18×2, type RL83E, is the most frequently used pipe in the system for floor assemblies. Pipes 16×1.8 RL59E or 20×2.3 RL129E may also be used because polystyrene system boards are adjusted to hold all three different dimensions of pipes (16, 18 and 20). Both types of metal-plastic pipes PEX-AL-PEX can be used too. Newly, gray polystyrene boards with a low-lambda design and thermal resistance 15% better than conventional polystyrene are available. Polystyrene system boards and locking ribbons with a span of 75mm are supplied, and the pipes are then placed in span multiples. Locking ribbons are also used in case of long distance transportation of floor heating material. Unfortunately, polystyrene system boards are too large in volume and hence the long-distance transport significantly increases the purchase costs of the system. Systems made of locking ribbons ensure more favourable prices and no cutting loss. Locking ribbons are anchored to the ground with a cranked clamp RL60 with 300 mm spacing. Consumption is 1 meter per one square meter of the heated area. Some customers use the RL60 clamp also for anchorage of pipes to common cut polystyrene, however, optimum surrounding of pipes with concrete is not achieved here and the heat performance of the floor is lower. When designing the pipe spacing, attention must be paid to the situations when the heating plates are connected from a common distributor with pavement or floating wooden floors. In such case, it is necessary to place system boards under the wood enabling smaller spacing.
Readiness for installation of the wet floor heating with the system board is on the level -100 mm. Polystyrene system board is 48 mm high (height of heat insulation is 22 mm). The piping is placed within the height of 48mm and B20 (P20 screed) class concrete floors are made on the upper side of polystyrene with a thickness of approx. 40 mm (the REVEL company neither stipulates nor supplies plasticizers, plasticizer has no significant effect on heat performance of the floor and, what is more, reduces strength of concrete, its use depends solely on the contractor). In car dealerships it is convenient to apply the reinforcing webs on polystyrene system boards and the foundation polystyrene supplied by the contractor should be of the pressed type with a higher load-bearing capacity, and not of the cut type. Tiles are stuck to permanently flexible plasters without dilatation allowed, or with dilatation in the heating plate for larger areas. It is important to separate the tiles from the walls with additional lining enabling to slide the tiles under. In case of cast floors, which are in connection with floor heating used more and more often, there are used no dilatations between individual loops, but only on the perimeter. Cast floors are more demanding as sealing and gap pre-cast are concerned to prevent leaking under and polystyrene floating.
