All about underfloor heating mixers

The basis of the autonomous water sys­tem is a mix­ing group for under­floor heat­ing and this is a great alter­na­tive to radi­a­tor heat­ing of apart­ments, coun­try hous­es and cot­tages. Depend­ing on the device, sta­tions with min­i­mal ener­gy costs (heat­ing of the coolant up to 35 C) are able to heat rooms with almost any area.


Purpose and device of the node

Underfloor heating mixing group

The main pur­pose of the pump-mix­ing group for under­floor heat­ing is to sup­ply a coolant of a giv­en tem­per­a­ture to each cir­cuit sep­a­rate­ly. If the area is large, then a sep­a­rate heat­ing cir­cuit is cre­at­ed for each room.

There are sev­er­al con­nec­tion schemes:

  • com­bined,
  • con­sis­tent,
  • par­al­lel.

Due to the high pro­duc­tiv­i­ty and effi­cien­cy, in most cas­es sequen­tial mix­ing is used — in the process, the heat car­ri­er enters imme­di­ate­ly to the con­sumer through the cir­cu­la­tion pump (heat loss­es are min­i­mal). When con­nect­ed in par­al­lel, part of the heat is lost.

The under­floor heat­ing mix­er device includes the fol­low­ing ele­ments:

  • self-reg­u­lat­ing feed valve;
  • cir­cu­la­tion pump and tem­per­a­ture sen­sor;
  • safe­ty valve and bypass.

Components of the mixing group

Advice! Sub­ject to the instal­la­tion rules, there is no dif­fi­cul­ty in con­nect­ing, but in the absence of expe­ri­ence in this area, it is bet­ter to imme­di­ate­ly turn to pro­fes­sion­als for help, this will save not only time, but mon­ey.

Advantages and disadvantages in operation

When con­sid­er­ing the capa­bil­i­ties and char­ac­ter­is­tics of the sys­tem, which includes a mix­ing group for under­floor heat­ing, a num­ber of advan­tages can be dis­tin­guished:

  • high lev­el of safe­ty — with prop­er instal­la­tion, burns are exclud­ed, which is espe­cial­ly impor­tant if there are small chil­dren in the fam­i­ly;
  • sav­ings — the arrange­ment of water floors reduces heat­ing costs by up to 50% when com­pared with stan­dard radi­a­tors;
  • easy care, after wash­ing, the sur­faces dry almost imme­di­ate­ly, which avoids the for­ma­tion of fun­gus and mold;
  • long ser­vice life — the small­est resource for pipes is at least 50 years;
  • ther­mo­sta­t­ic head on the valve allows you to lim­it the tem­per­a­ture;
  • on the two-way valve there is an elec­tric actu­a­tor con­nect­ed to the ther­mo­stat, due to which auto­mat­ic heat­ing takes place tak­ing into account the tem­per­a­ture out­side.

Scheme of operation of the mixing group

All the advan­tages pre­sent­ed allow you to cre­ate not only an effi­cient and inex­pen­sive heat­ing sys­tem, but also the most favor­able micro­cli­mate for liv­ing.

Advice! Dur­ing instal­la­tion, it is required not to for­get to leave a cer­tain space under the block from the cir­cuit, free space is nec­es­sary for bend­ing pipes.

The mix­ing group for under­floor heat­ing also has its draw­backs:

  • high cost (quick­ly pays off dur­ing oper­a­tion);
  • spe­cial atten­tion should be paid to the qual­i­ty of valves, since the effi­cien­cy and ser­vice life as a whole depend on the char­ac­ter­is­tics;
  • the cir­cu­la­tion pump is pow­ered by elec­tric­i­ty, and these are addi­tion­al costs.

Features and main installation steps

All work on installing a mix­er for under­floor heat­ing is car­ried out accord­ing to the schemes and accord­ing to a pre-devel­oped project accord­ing to the pre­sent­ed sequence:

  • a tube is screwed onto the out­let of the 3‑way valve as an exten­sion (about 10 cm long);
  • a pump is mount­ed on the sec­ond side, dur­ing instal­la­tion it is nec­es­sary to take into account the direc­tion of the coolant sup­ply (the des­ig­na­tions are indi­cat­ed by an arrow on the body);
  • the end of the “hot” cir­cuit is con­nect­ed to the out­let of the pump­ing equip­ment;
  • con­nec­tion of the “return” is car­ried out to the out­let of the 3‑way valve;
  • the hot water sup­ply is con­nect­ed to the inlet valve;
  • At the final stage, the sys­tem is test­ed.

Mixing group assy

Advice! You should not sup­ply a coolant above 80 C — the pipes will with­stand this tem­per­a­ture, but the cement screed will begin to col­lapse after a few hours.

The best pumping and mixing groups for underfloor heating

Man­u­fac­tur­ers from many coun­tries of the World rep­re­sent their prod­ucts on the mar­ket, but the fol­low­ing brands are more pop­u­lar and in demand:

  1. The Ital­ian fac­to­ry SANEXT sup­plies the whole range of equip­ment and acces­sories for the instal­la­tion of water floors: from pipelines, heat meters to col­lec­tors. Pipes are of high qual­i­ty and are made of cross-linked poly­eth­yl­ene. The three-lay­er coat­ing allows you to reduce the noise lev­el dur­ing oper­a­tion.
  2. The Ger­man trade­mark REHAU is known through­out Europe. A dis­tinc­tive fea­ture of mix­ers for under­floor heat­ing: min­i­mal noise and the pres­ence of an anti-oxy­gen bar­ri­er. The prod­uct comes with a 10-year man­u­fac­tur­er’s war­ran­ty.
  3. The Ger­man brand AQUATHERM occu­pies a lead­ing posi­tion in the mar­ket for the man­u­fac­ture of com­po­nents. Many years of expe­ri­ence (the fac­to­ry was found­ed in 1973) and con­stant mod­ern­iza­tion of pro­duc­tion facil­i­ties allow us to sup­ply durable and high-qual­i­ty prod­ucts.
  4. The Finnish trade­mark UPONOR is rep­re­sent­ed on the Amer­i­can, Euro­pean and Euro­pean mar­kets. The com­pa­ny pro­vides con­sumers with com­pre­hen­sive solu­tions from poly­eth­yl­ene pipes and man­i­folds to auto­mat­ic con­trol sys­tems.

KERMI (Ger­many), OVENTROP (Ger­many), HENCO INDUSTRIES (Bel­gium), EMMETI (Italy) are also con­sid­ered pop­u­lar man­u­fac­tur­ers of the mix­ing group for under­floor heat­ing.


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