Underfloor heating Rehau water: installation, calculation and installation of mats, tires and Rehau pipes, as well as the pros and cons of the system

About Rehau

Rehau polyethylene pipes for water underfloor heating

The company was founded in 1948 by Helmut Wagner. The company got its name from the name of the city - Rehau. The staff consisted of only 3 people involved in the manufacture of watering hoses, car parts and soles. However, already in 1951, Wagner opened a second plant for the production of plastic pipes and began to cooperate with the Volkswagen concern.

The turning point in the history of the company was the production of PVC pipes by extrusion, which began in 1958. Since then, Rehau has been rapidly mastering new technologies and expanding production. In 1968 it produces a cross-linked polyethylene pipeline, in 1988 it introduces a technology for connecting pipes using a movable sleeve. In parallel, the company offers innovative solutions for the automotive and aerospace industries. Since 1995, Rehau CFRP has been used in aircraft assembly.

The company released the first warm floor in 1986. For 30 years, the system has reached perfection.

Installing underfloor heating from Rehau reduces installation costs by 50%. Electrical retrofitting thanks to control systems reduces operating costs by 60%.

Additional elements

Installation of the Rehau water underfloor heating pipeline is carried out using special fasteners.

Varionova mats are made of expanded polystyrene and are equipped with pipe clamps. In addition to the main function of facilitating installation, these elements are equipped with heat and sound insulating properties. The mats are fastened together using a connecting strip using the seam method.

Mats with clamps and thermal insulation Rehau Varionova

Panel with clamps Varionova without insulation

The advantages of using Raufix tires lie in their design

Rehau underfloor heating is a ready-made system equipped with all the necessary fasteners for fixing mats and pipes on mats and panels. These include:

harpoon clamps designed to fix pipes;

Tece shackle for underfloor heating

Insulation nails and clips for underfloor heating

Hydraulic underfloor heating from Rehau is controlled by a distribution manifold, available in various modifications. The most popular among consumers is the assembled manifold equipped with a thermostat and a flow meter.

Types of warm floors

The pipe material does not react with chemicals in the water, so no scale builds up on the walls

Rehau offers 2 types of underfloor heaters: electric - Soletec, and water - Rautherm S and Rautitan. Both systems are economical, safe, and have an efficiency close to 100%.

Water

The basis of a water floor is pipes designed for an underfloor heater. Products with a diameter of 10.1 to 32 mm and a wall thickness of 1.1 to 2.9 mm are produced. They have an additional oxygen-protective layer of cross-linked polyethylene. This technology provides:

• high thermal conductivity - the pipe gives off heat to the floor surface with maximum high efficiency;
• outstanding performance parameters - the heater can withstand heating up to 90 degrees and pressure up to 6 bar;
• resistance to mechanical damage - the tubes are difficult to damage during installation, leakage is excluded;
• flexibility - when laying, they can be bent at any angle;
• no corrosion - cross-linked polyethylene is inert towards any chemically aggressive substances. No salt or clots are deposited on the pipe walls.

The pipes are connected to each other using the movable sleeve technology, which guarantees complete tightness.O-rings are not needed, as they are included in the design of the pipes themselves.

Rehau has developed all the elements of joining and fixing for a water-heated floor: polystyrene mats, film panels, harpoon brackets, RAUFIX tires. The devices reduce the installation time by 4 times.

Electric

Rehau cable floor does not generate magnetic radiation, can be installed in damp rooms

The Rehau cable floor is devoid of the drawbacks typical of such a system. In the manufacture of a two-core cable, reinforced with Kevlar. It can withstand higher loads and temperatures. Teflon insulation prevents overheating of the elements, and the braided shield protects the user from electromagnetic radiation.

The set includes cables, laying mats, socket boxes, a protective tube for the sensor, rotation clamps, a corrugated tube. The cable is only 5.5 mm thick and the mat is 3.5 mm thick. The system is laid in a screed or in a layer of tile glue directly under the tile. The warm floor practically does not change the height of the room.

The Rehau electric floor does not dry the air, does not create an electromagnetic field, and does not overheat the coating. Installation is allowed in bathrooms, in bathrooms, in kitchens, in children's rooms. Any coating: linoleum, wood, ceramics, laminate, even carpet.

Floor heaters are equipped with digital programmable thermostats and analog ones. The cost of the former is higher, but such a thermostat allows not only to decrease or increase the temperature, but also to form a heating mode, which reduces costs by 15-30%.

If the underfloor heating is the main heater, the screed thickness is less than 35 mm. Concrete accumulates heat: the thicker its layer, the longer the heated floor cools down.

Description of electric heating

The play area in the children's room or the floor near the bed in the bedroom can be heated with a heating cable. A distinctive feature of the conductor is the absence of a sleeve for connecting the heating conductors and the presence of a drainage rod. The veins are a single unit. For a separate room, choose a section of cable of a certain length and power.

There is a Kevlar braid on the hot core: the material is stronger than steel; any mechanical damage is excluded. The insulation is made of Teflon, which allows the cable to be heated up to 100 ° C. The shield, which is represented by a copper braid, protects from electromagnetic radiation.

For the convenience of installing the mains, the company produces underfloor heating Rehau Solelect. These are heating mats. They are made of polymer mesh. A two-core cable is fixed on its surface. System thickness 4.5 mm. Installation is carried out under a thin screed or tile adhesive with a thickness of no more than 3-4 cm. The mats can be easily strengthened on the base. They have an adhesive backing. No additional brackets or mounting straps are required.

Floor cladding can be either hard or soft texture: from natural stone to carpet. The system operates on a 220 W electrical network. You can buy it from Rehau dealers in Moscow.

1. The heating system, in addition to heating mats, includes a temperature sensor. It is placed on a heating surface, at a distance of 20 cm from the edge.
2. The cable from the mats and the sensor is placed in a corrugated tube with an aluminum sheath.
3. All conductors are connected to the thermostat. It is placed on the wall, at a height of at least 30 cm.
4. The thermostat has software that makes it possible to install a specific heating system. The system turns off when the rate drops by 0.1 degrees.
5. also manufactures mechanical thermostats. They turn on heating when the floor temperature drops by 1 degree.
6. For the corrugated pipe on the floor and on the wall, provide an exit in the floor. In order for the tube to fit snugly at the transition between the floor and the wall, a special corner retainer is provided.

We recommend: What kind of underfloor heating should be used?

Electric heating is connected via an RCD; current strength 30 A.Mats or cables are placed 3 cm away from any source of electricity. For residential premises, choose a system power of 120 watts. For children's rooms 140-150 W. For underfloor heating of a bathroom or toilet, 180 W is recommended.

Water or electric heating from "Rehau" is distinguished by its reliability and durability. All materials undergo mandatory safety testing and have certificates. The manufacturer allows to perform flooring from tiles, linoleum, carpet, parquet. The design of the room can be anything. There are no interior restrictions.

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Advantages and disadvantages of Rehau underfloor heating systems

Durable material - Kevlar, which covers the Rehau electrical cable

Any floor heating option has the following advantages:

• Reliability - the cable is reinforced with Kevlar and the water pipes are protected by a XLPE sheath. Both heating elements withstand high loads and heating with a large margin - + 90 and +95 C at operating +60 C.
• Overheating and destruction are excluded. Insulation and cross-linked polyethylene prevent mechanical damage;
• Flexible tubes and cables are laid according to different schemes and achieve uniform heating of the entire area.
• No contamination - there is no excess air circulation when the surface is evenly heated. Dust and dirt do not move around the room.

Rehau underfloor heating can be installed in apartments where allergy sufferers live.

There are also disadvantages:

• Installation of the system is technically simple, since the kit includes all the necessary elements for installation. However, wiring diagrams and calculations are far from simple and require experience.
• Screed laying is a complicated and messy process. But here the point is not in the floor heater, but in the screed itself.
• Installation is carried out on a prepared floor.

Repairing an underfloor heater is difficult. To remove the damaged fragment, you need to remove the finishing coat, remove the screed or adhesive layer and replace the pipes or cables. This rarely happens: the manufacturer does not in vain give a guarantee for heating elements for a period of 10 years.

Characteristics of the electric floor "Rehau"

Warm floor "Rehau" is also represented by electric models. In this case, we are talking about the Solelec variety. The products are supplied with self-regulating two-wire cables, a thermostat with a sensor and an installation kit. Heating time does not exceed 2 hours. Heating costs are much higher compared to a water system. However, electric floors can be installed in apartment buildings without affecting ceiling heights.

If you want to choose a system with a minimum thickness, then you should prefer mats, while the cables are fixed to the mounting mesh. It is very easy to install the warm floor "Rehau", it is provided by an elastic layer of the shell. Installation can be carried out even at temperatures below +5 ° C without losing flexibility. The cores of the heating element are reinforced with Kevlar, so they remain resistant to different loads.

The cable has a circular cross-section, which simplifies the installation process. The manufacturer took care of increasing the service life by providing the heating conductors with Teflon insulation. The cold cable is connected to the heating element by welding. Underfloor heating Rehau in mats can have a minimum thickness of 2.8 mm. As for the length, it can be at least 2 m. The maximum value reaches 16 m.

The width starts from 0.25 m. If you want to choose a system by area, you should know that this parameter can reach 8 m2. The cable thickness is 55 m, its length can vary from 10 to 120 m. Its minimum bending level is equivalent to 35 mm. Some craftsmen may also be interested in the cross-sectional area, it is 18 m2 maximum.

Installation and assembly of underfloor heating

Installation of underfloor heating in cellular polystyrene plates Rehau Varionova

The electric floor is laid in several stages. All requirements of the instructions must be strictly followed.

1. Calculate the area of ​​the future heater. Pipes are laid only on a free area, since it makes no sense to heat the floor under the furniture.
2. Choose a styling scheme: snail, snake, double snake. The laying step is calculated. In central Russia, the optimal distance between the loops is 11-18 cm. The total length of the contour is taken into account - no more than 120 meters, even with the largest diameter of 32 mm.
3. The subfloor is leveled, a damper tape or profile is laid to compensate for the expansion that is inevitable when the pipe heats up.
4. The base floor is insulated with a layer of expanded polystyrene, protected from moisture with a plastic wrap. If you install mats, no additional insulation is needed.
5. Install a distribution manifold and connect it to the boiler.
6. Mats or panels are placed, and flexible tubes are laid on them according to the scheme. Each tube is connected to a manifold. The heating elements are fixed with special fasteners.
7. The warm floor is checked for operability: it is connected to a pump, which maintains a pressure of 4-5 bar for 24 hours.
8. If there are no leaks, the floor warms up evenly, it is poured with a cement-sand screed and reinforced.
9. After hardening (28 days), a finishing coat is applied.

Installation of a water floor takes longer and requires more costs than installing an electric floor, but its work is cheaper.

The choice of mats for underfloor heating

Rehau brand fixing rail for underfloor heating pipes

There are 3 types of backing:

• Mats for warm water floors Rehau Varionova are made of expanded polystyrene. This model replaces the thermal insulation layer, as the material retains heat well. The surface is embossed, includes clamps of complex shape. The tubes are placed between the clamps.
• Varionova panels are a shaped polystyrene foam backing with square or cylindrical bosses. Heating pipes are placed between the protrusions. The panel also traps heat and dampens sound.
• RAUFIX tires are rigid polypropylene backing. On the underside there are sharp staples so that the tire can be fixed to any surface. Does not possess thermal insulation properties.

The company also produces clips and harpoon clips for fixing heating elements.

If a warm floor is laid in a room above an unheated cellar, you cannot do without thermal insulation.

Operation of underfloor heating Rehau

Before laying in a screed, the warm floor is pressed under pressure

Recommendations for the use of warm floors are simple:

• It is impossible to sharply increase the temperature, and even more so the supply of water. You also need to ensure that children do not gain access to the control device.
• Inspection and repair of the structure is performed by a specialist. Independent actions are prohibited.

The entire system is buried in the floor and is practically inaccessible. She is not afraid of puddles in the bathroom, frost on the balcony, the weight of the dishwasher in the kitchen.