Rehau warm floors: installation, installation, cost and overview


underfloor heating Rehau

Despite the fact that the sys­tems of “warm floor” appeared in our coun­try not very long ago, they quick­ly gained pop­u­lar­i­ty among con­sumers, mak­ing a very wor­thy com­peti­tor to tra­di­tion­al meth­ods of heat­ing. This is not sur­pris­ing, because heat­ing hous­es and apart­ments in this way has a lot of unde­ni­able advan­tages, includ­ing high effi­cien­cy and econ­o­my.

At present, sys­tems from var­i­ous man­u­fac­tur­ers are on the domes­tic mar­ket, the most pop­u­lar and well-known of which is the Ger­man com­pa­ny Rehau, which pro­duces sev­er­al types of Rehau under­floor heat­ing.

Types of underfloor heating Rehau

Under the brand name, two types of under­floor heat­ing are pro­duced: water-based and elec­tric-based. In the first case, water is used as a heat car­ri­er, heat­ed to a cer­tain tem­per­a­ture, pass­ing through the con­tours of the heat­ing sys­tem and giv­ing off heat to heat­ed rooms.


water floor with heating and collector
Under­floor heat­ing Rehau water is most often installed in sys­tems with forced cir­cu­la­tion. This is due to the fact that heat­ing the coolant to the opti­mum tem­per­a­ture requires the use of a mix­ing unit, which can­not be oper­at­ed with­out a pump­ing unit.

This method of heat­ing is main­ly found in the pri­vate sec­tor, since tap­ping into the cen­tral heat­ing mains of apart­ment build­ings is not allowed due to an increase in the lev­el of hydraulic resis­tance in the sys­tem.

When con­nect­ed to a pipeline with hot water, the coolant pass­ing through the “Warm Floor” in a sin­gle apart­ment will return already cooled down, which will neg­a­tive­ly affect the qual­i­ty of heat­ing of apart­ments locat­ed down­stream of the ris­er.

At the same time, water Rehau floors have the fol­low­ing advan­tages:

  • The min­i­mum lev­el of heat loss.
  • High strength and dura­bil­i­ty.
  • No need for spe­cial main­te­nance and care.
  • The pos­si­bil­i­ty of arrang­ing floor heat­ing, both through­out the room and in its indi­vid­ual sec­tions.
  • The pos­si­bil­i­ty of using var­i­ous instal­la­tion options, for exam­ple, with pour­ing a liq­uid screed or installing pipes at an acute angle.


advantage of underfloor heating in apartmentsUnder­floor heat­ing Rehau elec­tric is a sys­tem of two-core self-reg­u­lat­ing cables of fixed lengthwith high resis­tance. Out­side, they are cov­ered with a dou­ble lay­er of insu­la­tion and a pro­tec­tive braid.

Such a floor is mount­ed in a lay­er of cement-sand screed, poured on a sur­face that requires heat­ing, and it can be used not only in liv­ing rooms, but also in out­door areas of build­ings (stairs, ter­races, roofs and roofs, open areas, access roads, etc.). for addi­tion­al weath­er pro­tec­tion.

For rooms in which the instal­la­tion of a cement-sand screed is irra­tional or impos­si­ble, Rehau heat­ing mats are intend­edwhich are ready-made struc­tures con­sist­ing of cables fixed with a con­stant pitch in the form of turns on a tex­tile mesh.

Such sys­tems are con­trolled by ther­mostats — spe­cial devices used to adjust the floor tem­per­a­ture.

Pros of Rehau elec­tric floors:

  • Econ­o­my through the use of new gen­er­a­tion ther­mo­sta­t­ic equip­ment.
  • Even and soft heat­ing the entire sur­face of the floor.
  • The present “Ger­man qual­i­ty”, which is expressed in high reli­a­bil­i­ty and dura­bil­i­ty of the sys­tem.

Among the fea­tures of heat­ing sys­tems pro­duced under this brand, there are also it is worth not­ing:

  • Use of ener­gy effi­cient advanced tech­nolo­gies at all stages of devel­op­ment and pro­duc­tion.
  • Avail­abil­i­ty of a guar­an­tee for com­po­nents and acces­sories.
  • High degree of pro­tec­tionthanks to which pipes, cables and mats for under­floor heat­ing Rehau are dif­fi­cult to dam­age or spoil.
  • Sim­plic­i­ty and ease of instal­la­tion.
  • Com­pli­ance with inter­na­tion­al and domes­tic reg­u­la­tions and qual­i­ty and safe­ty stan­dards.

System design development

In order for the floors to work as eco­nom­i­cal­ly and effi­cient­ly as pos­si­ble, before car­ry­ing out instal­la­tion work, it is nec­es­sary to draw up a project for the future heat­ing sys­tem.

Before lay­ing Rehau under­floor heat­ing, the cal­cu­la­tion is made tak­ing into account the required pow­er of the heat­ing sys­tem, using data on its spe­cif­ic heat capac­i­ty as a basis:

In rooms with high-qual­i­ty ther­mal insu­la­tion, this fig­ure is 70 — 150 W per m2.

heating alternative - underfloor heating

Rehau water floor con­sists of the fol­low­ing com­po­nents:

  • pipe kit made of cross-linked poly­eth­yl­ene, with increased resis­tance to high pres­sure lev­els, com­plet­ed with fit­tings and cou­plings for mount­ing con­nec­tions.
  • Addi­tion­al mount­ing ele­ments (retain­ers, etc.).
  • Devices that con­trol the sys­tem (combs, ther­mostats and tem­per­a­ture sen­sors).

Lay­ing sys­tem ele­ments can be done in sev­er­al ways:

  • Spi­ral.
  • Ser­pen­tine.
  • In the form of a dou­ble helix.

The pipeline is laid in incre­ments of 11–18 cm. In this case, the length of the pipes should not exceed 15 m, oth­er­wise, due to the tem­per­a­ture dif­fer­ence between the ini­tial and final points of the pipeline, its heat­ing will be uneven.

When com­plet­ing the sys­tem, first of all, Rehau pipes for under­floor heat­ing are select­ed. They play a lead­ing role in the func­tion­ing of heat­ing, act­ing as the main link in the entire heat­ing com­plex.

In this capac­i­ty RAUTHERM pipes are usedMade from high strength crosslinked poly­eth­yl­ene. For greater reli­a­bil­i­ty and dura­bil­i­ty, their walls have an eth­yl­ene vinyl alco­hol lay­er. Their char­ac­ter­is­tics:

heated strip from a German manufacturer

  • High resis­tance mechan­i­cal influ­ences.
  • Short resis­tance lev­el heat trans­fer.
  • Elas­tic­i­tyensur­ing the absence of creas­es and kinks.
  • Neu­tral to chem­i­cal envi­ron­mentsthanks to which the pipes do not lose their per­for­mance even when in con­tact with alka­lis and oth­er chem­i­cals.
  • High ther­mal sta­bil­i­ty.

For fas­ten­ing and dock­ing of the pipeline in the sys­tem, slid­ing cou­plings and Rehau fit­tings are used, equipped with fit­tings with a ribbed sur­face, which in the nor­mal state are unable to pass through the inner diam­e­ter of the pipes.

For mount­ing the con­nec­tion, spe­cial expanders are used, with the help of which the inner diam­e­ter of the pipe expands.

In prac­tice, this hap­pens as fol­lows:

  • First of all, a slid­ing cou­pling is put on the pipeafter which the expander expands the sock­et in sev­er­al steps.
  • Then a fit­ting is placed on the pipe suit­able fit­ting and using a press, slide the sleeve onto the fit­ting over the pipe.

A con­nec­tion of this type guar­an­tees com­plete seal­ing of the pipeline, makes the pipes as resis­tant to high tem­per­a­tures and pres­sure as pos­si­ble.

Advan­tages of using fit­tings:

  • Ease and con­ve­nience of instal­la­tion con­nec­tions using spe­cial devices.
  • No rust or rub­ber sealsreduc­ing the ser­vice life of pipes.
  • Pos­si­bil­i­ty of visu­al con­trol dur­ing instal­la­tion.
  • After crimp­ing fit­tings can be built into the walls and screeds.
  • Due to the col­lapsi­ble nature of such a sys­tem, fit­tings can be reused.

Var­i­ous fas­ten­ers are used to fas­ten the pipeline in Rehau under­floor heat­ing. For exam­ple, fix­ing mats Var­i­ono­va, which are plates made of rigid poly­mer­ic mate­r­i­al, equipped with spe­cial clips for instal­la­tion over pipes.

They are cut along the mark­ing lines into frag­ments of the required area and are joined using the con­nect­ing ele­ments includ­ed in the kit. The min­i­mum step for lay­ing pipes with a diam­e­ter of 14–17 mm in such a sys­tem is 5 cm.

Anoth­er mount­ing option — RAUFIX tiresmade of poly­eth­yl­ene of increased rigid­i­ty, on the reverse side, equipped with spe­cial brack­ets that allow you to fix the pipeline on the bases of almost any kind.

rehau mats

Their advan­tage is a small thick­ness, due to which the total thick­ness of the floor increas­es by no more than 5 cm. Tires hav­ing a length of 1 m and a width of 4 or 5 cm are mount­ed on top of the heat-insu­lat­ing lay­er in incre­ments of 5 cm.

The main con­trol ele­ment of the sys­tem is a comb or col­lec­tor — a device that col­lects flows and dis­trib­utes them through pipes. Rehau col­lec­tors for under­floor heat­ing are avail­able in sev­er­al mod­i­fi­ca­tions, the opti­mal of which is con­sid­ered to be a com­plete comb, with a ther­mo­stat and a flow meter installed on the inlet and out­let col­lec­tors.

Installation and installation of a water floor

Rehau under­floor heat­ing instal­la­tion includes the fol­low­ing oper­a­tions:

Rehau - German flooring quality

  1. Foun­da­tion prepa­ra­tion. Work on lay­ing the under­floor heat­ing sys­tem is car­ried out only after the com­ple­tion of the main fin­ish­ing work in the room, includ­ing plas­ter­ing sur­faces. The old coat­ing is dis­man­tled along with the base­boards, cleaned of dust and debris. If nec­es­sary, lev­eled with a cement-sand screed. Lay­ing the warm floor is car­ried out on a dry sur­face, the dif­fer­ences on which should be no more than 5 mm.
  2. Water­proof­ing lay­er devices. In this capac­i­ty, you can use a dense plas­tic film, lay­ing it with an over­lap and glu­ing the seams with tape.
  3. Damper tape glu­ing. It is laid at the junc­tion of the floor to the walls.
  4. Lay­ing the ther­mal insu­la­tion lay­er. To cre­ate it, you can use peno­fol, which has good fire resis­tance, envi­ron­men­tal friend­li­ness and mois­ture resis­tance.
  5. Mount­ing fas­ten­ers (fix­ing mats or splints). Their assem­bly is car­ried out by anal­o­gy with the lam­i­nate: “in the cas­tle.”
  6. Mount­ing comb. It is installed in a switch cab­i­net con­nect­ed to a boil­er or heat­ing sys­tem, after which mount­ing mats are laid. Places of hid­den con­nec­tions are addi­tion­al­ly wrapped with a spe­cial fix­ing tape.
  7. Line gas­kets. It starts with con­nect­ing to the col­lec­tor.
  8. Screed pour­ing. It is poured onto the pipeline in a thin lay­er, not more than 30 mm. For addi­tion­al strength of the struc­ture, a rein­forc­ing mesh is used.
  9. After com­plete cur­ing, the screeds are warm floors can be turned on.

For more infor­ma­tion on how to lay Rehau under­floor heat­ing, see the video:

Prices and tips for choosing

It should be borne in mind that the price for Rehau under­floor heat­ing is quite high. And it depends on the type of sys­tem and its oper­a­tional char­ac­ter­is­tics. For exam­ple, elec­tric heat­ed floors, rep­re­sent­ed by the Rehau Sol­elec mod­el, con­sist­ing of twin-core mats, will cost about 1600–50 dol­lars per square meter.

The price of heat­ing cables of the brand is slight­ly low­er. On aver­age, it ranges from 1100 to 33$. Here you also need to add the cost of instal­la­tion ser­vices: from 4 dol­lars per square meter.

Water floors Rehau will cost less. The cost of col­lec­tors, depend­ing on the num­ber of flow meters, will be:

Num­ber of flowme­ters
7 eight 9 ten eleven 12
rehau 15250 rub. 16900 rub. 18400 rub. 19800 rub. 21500 rub. 22500 rub.

Prices for acces­sories:

Pro­tec­tive poly­eth­yl­ene film From 62.42 rubles. per square meter
Pro­filed wall insu­la­tion From RUB 79.90
Pipe rota­tion clamps 86 — 260 rubles.
Guide bends with rings 167 — 270 rubles.
Pro­files for expan­sion joints 665 rub.
Mats Var­i­ono­va 729 — 13$.
Cou­plings 50–100 rub.

Feedback on the operation

The best cri­te­ri­on of qual­i­ty and con­fir­ma­tion of the advan­tages that Rehau’s warm floor has are the reviews of con­sumers who have “expe­ri­enced it in prac­tice.” Here is some of them:

Iri­na, 45 years old, Sama­ra

“I con­sid­er Rehau floors to be the best solu­tion for home heat­ing. I have water floors of this brand in my bath­room for about 3 years (area 6 sq. M). Since then — no leaks, break­downs and prob­lems. I spent about 66$ on every­thing. Plus instal­la­tion: 22$. The only weak point: the screed dried for a long time, about two weeks … ”

Sergey, 33 years old, Yeka­ter­in­burg

“It was decid­ed to install a warm floor in the apart­ment not “from noth­ing to do”, but out of neces­si­ty. There was ter­ri­ble damp­ness in the bath, cold due to the fact that one of the walls was exter­nal. There­fore, Rehau elec­tric heat­ed floor was placed under the tiles. As a result, the result exceed­ed expec­ta­tions: the room final­ly became warm! And my feet are nice. And thanks to the fact that the kit has a ther­mo­stat, it is con­ve­nient to con­trol this floor. In gen­er­al, just super! .. ”

Anton, 30 years old,

“Plan­ning the heat­ing of a coun­try house, in sev­er­al rooms (kitchen, bed­room and bath) they decid­ed to make warm floors. We chose the Rehau water sys­tem. Instal­la­tion of a square meter (with mats, pipes and instal­la­tion) cost 2230 rubles. So far sat­is­fied with the qual­i­ty and per­for­mance of the floors. The house is com­fort­able and cozy. And, most impor­tant­ly, no care for them. So, I rec­om­mend! .. ”

The devel­op­ment of mod­ern tech­nolo­gies, the emer­gence of new, high-tech mate­ri­als allows you to take a fresh look at heat­ing hous­es and apart­ments.

And one of the suc­cess­ful solu­tions in this area is the use of Rehau water and elec­tric floor sys­tems, which are a bal­anced com­bi­na­tion of price and qual­i­ty. They are easy to install and main­tain and last a long time with­out break­downs or repairs.

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