Barred warmth

The author of the project N.Kuznetso­va
Pho­to by E.Fram­pol
It is unde­sir­able to hang cur­tains over con­vec­tors. How­ev­er, if you can­not do with­out it, then it is nec­es­sary that they do not inter­fere with the air cir­cu­la­tion through the con­vec­tor

In con­vec­tors with cross-flow fans, inten­sive cir­cu­la­tion of room air through the heat exchang­er is ensured. But heat­ing is also pos­si­ble in nat­ur­al con­vec­tion mode.
Diam­e­ter­al fans are mount­ed on rub­ber vibra­tion mounts
“ISOTHERM”
JAGA
To pro­tect against dam­age, the fans of built-in con­vec­tors are cov­ered with cas­ings.

Con­vec­tors with a radi­al fan inten­sive­ly heat the premis­es, but to reduce noise, the pow­er of these devices is select­ed at 50% of the max­i­mum per­for­mance
Stepped heat­ing con­troller
Remov­ing the air lock before start­ing

Floor to ceil­ing win­dows- the dream of many devel­op­ers. But how to heat rooms dec­o­rat­ed with these trans­par­ent struc­tures? You can’t put tra­di­tion­al bat­ter­ies under high win­dows- will block day­light, spoil the view of the sur­round­ings, enter into dis­so­nance with the inte­ri­or and dis­tort the per­cep­tion of the exter­nal appear­ance of the build­ing. But there is still a way out: to equip effi­cient heat­ing with­out dam­age (and pos­si­bly- and with ben­e­fit) for design allow con­vec­tors built into the floor.

Designer’s dream

Most often, floor-mount­ed con­vec­tors are used in heat­ing sys­tems for cot­tages, less often- when heat­ing city apart­ments. When first com­ing to the atten­tion of a buy­er in a store or in the con­struc­tion mar­ket, such a device is usu­al­ly per­ceived as a long, low box with a lid in the form of a dec­o­ra­tive lat­tice. Under the grate, in the hous­ing (it is also called a gut­ter), an air-heat­ing heat exchang­er is installed (a tube with plates strung on it), which is con­nect­ed to the heat­ing sys­tem- from con­tact with it, the air tem­per­a­ture in the room ris­es. In addi­tion to the heat exchang­er, small fans with elec­tric motors (one or more) can be locat­ed in the con­vec­tor chute, allow­ing you to accel­er­ate the heat­ing of the room due to the inten­sive air­flow of the heat exchang­er, as well as var­i­ous con­trol devices. A con­vec­tor with a fan is also called a floor-mount­ed fan coil unit.- we already wrote about such equip­ment in one of the pre­vi­ous issues of our mag­a­zine.

Dur­ing instal­la­tion, the hous­ings of built-in con­vec­tors are hid­den in the floor struc­ture. They are immersed in a cement screed (“set­tle”) or installed in open­ings orga­nized in raised floors. Once the floor­ing is com­plet­ed, only dec­o­ra­tive grilles that are flush with the fin­ished sur­face will remain vis­i­ble. An unini­ti­at­ed per­son, enter­ing a room heat­ed by built-in con­vec­tors, is unlike­ly to imme­di­ate­ly deter­mine where the heat comes from,- Is it real­ly from these nar­row “car­pet paths” laid out under the win­dows? ..

Design­ers dis­cov­er such a cov­et­ed embod­i­ment of the “invis­i­ble bat­tery” in floor-mount­ed con­vec­tors. BUTall because built-in con­vec­tors are able to organ­i­cal­ly fit into almost any inte­ri­or.

The col­or of the grille of floor-mount­ed con­vec­tors can be “matched” to the col­or of the floor cov­er­ing or oth­er impor­tant ele­ments of the inte­ri­or dec­o­ra­tion of the house: fur­ni­ture uphol­stery, cur­tains, wall­pa­per col­or andt.e. For­tu­nate­ly, most man­u­fac­tur­ers of con­vec­tors offer a fair­ly rich palette of pos­si­ble shades of grat­ings. Grilles are made, as a rule, from alu­minum (with­out fin­ish­ing, anodized or coat­ed with poly­mer paint), pre­cious woods (oak, beech, mahogany, wal­nut, less often birch) or plas­tic. The cross­bars that make up the grate can be locat­ed across the con­vec­tor chute- such a prod­uct looks like a rope lad­der and is flex­i­ble (it is easy to roll it into a bay, which is con­ve­nient, say, when clean­ing a room). Along the gut­ter there are cross­bars of rigid and semi-rigid alu­minum grat­ings (in the lat­ter, the lin­ear ele­ments are fas­tened togeth­er with the help of spe­cial flex­i­ble springs, which make it pos­si­ble to strict­ly observe the dimen­sions and not to bur­den the struc­ture).

Ser­i­al con­vec­tors are rec­tan­gu­lar in plan, their dimen­sions are deter­mined once and for all by the man­u­fac­tur­er. So, the width of the grat­ings is 140–430mm, length- 800‑5000mm. But if for some rea­son the rec­tan­gu­lar shape and stan­dard dimen­sions of the devices do not suit you, you can order the appro­pri­ate option “for a spe­cif­ic room”. The­o­ret­i­cal­ly, built-in con­vec­tors can have an unlim­it­ed length and curvi­lin­ear shape. It is pro­posed to con­nect the grat­ings with a mus­tache in the cor­ners of the room (the angle of their artic­u­la­tion for some man­u­fac­tur­ers is only 90while oth­ers range from 0 to 180). The con­vec­tor can fol­low the con­tours of curved sec­tions of walls (for exam­ple, in bay win­dows), go around columns andt.e. Grids with met­al inserts, lamps, elec­tri­cal sock­ets and oth­er built-in equip­ment are made to order.

FROMfrom the point of view of ther­mal physics, con­vec­tors built into the floor are good for their low iner­tia. Due to the min­i­mum vol­ume of hot water con­tained in their heat exchang­ers, they react almost instant­ly to chang­ing heat needs of the room, pro­vid­ing high com­fort and sav­ings on heat­ing costs.

Atof high-qual­i­ty con­vec­tors, the grat­ings are heat­ed up to no more than 40–45C, even if the tem­per­a­ture of the coolant is high enough. Con­se­quent­ly, even with pro­longed con­tact with their sur­face, it is impos­si­ble to get a burn. How­ev­er, walk­ing bare­foot on the bars is still not rec­om­mend­ed. Inte­ri­or items, includ­ing leather sofas, arm­chairs, antique wood­en fur­ni­ture and mod­ern elec­tri­cal equip­ment, can often be locat­ed in close prox­im­i­ty to the con­vec­tor with­out the risk of dam­age. The air pass­ing through the device comes into con­tact with only small areas of the high­ly heat­ed heat exchang­er tube, the total area of ​​u200bu200bwhich is 3.5–5% of the entire heat­ing area; the plates are notice­ably cold­er. In addi­tion, even at the max­i­mum tem­per­a­ture of the heat car­ri­er, the sur­face of the heat exchang­er has a tem­per­a­ture of about 60C, which prac­ti­cal­ly elim­i­nates the burn­ing of dust and sig­nif­i­cant­ly reduces (com­pared to oth­er types of heaters) pos­i­tive air ion­iza­tion, which adverse­ly affects human health and well-being.

Not a single lattice

Of course, if con­vec­tors includ­ed only a dec­o­ra­tive grille, they would be used every­where, and the entire pro­ce­dure for choos­ing a device would be reduced to pure­ly design tasks. How­ev­er, in prac­tice, every­thing is much more com­pli­cat­ed. The choice of the lat­tice is car­ried out at the very last turn, after clar­i­fi­ca­tion of all the ther­mo­phys­i­cal and con­struc­tion char­ac­ter­is­tics of the devices. Maybe, for exam­ple, it turns out that con­vec­tors designed for the immer­sion depth that is avail­able in this par­tic­u­lar room sim­ply do not exist in nature. Or the ther­mal pow­er of the equip­ment will be insuf­fi­cient to deal with the con­den­sate falling on the win­dows and walls (this applies, first of all, to very high rooms, for exam­ple, the halls of cot­tages). Othe pos­si­bil­i­ty of using floor-mount­ed con­vec­tors in heat­ing or cool­ing sys­tems can only be judged by the results of detailed cal­cu­la­tions, which can only be car­ried out by pro­fes­sion­als- firms-sup­pli­ers of con­vec­tors, as well as design and instal­la­tion orga­ni­za­tions that had expe­ri­ence in deal­ing with such equip­ment.

To facil­i­tate com­mu­ni­ca­tion with the sup­pli­er, we will con­sid­er the basic design ele­ments of built-in con­vec­tors. At the same time, we divide the devices into two groups: with a fan that inten­si­fies heat trans­fer, and with­out a fan.

MHLENHOFF
Range of floor mount­ed con­vec­tors JAGA extreme­ly wide. Here are just some of the “rep­re­sen­ta­tives”
MHLENHOFF
Types of dec­o­ra­tive grille in IZOTERM con­vec­tors
The author of the project N.Kuznetso­va
Pho­to by E.Fram­pol
Roll grate- flex­i­ble, it can be rolled into a roller when clean­ing

In cen­tral Europe, con­vec­tors with­out fans are usu­al­ly used as addi­tion­al heat­ing for res­i­den­tial premis­es in con­junc­tion with a floor heat­ing sys­tem. ATIn such a bunch, they notice­ably (sev­er­al times) accel­er­ate the response of the equip­ment to a rapid decrease or increase in tem­per­a­ture in the house. More­over, in spring and autumn, under­floor heat­ing can be turned off- enough pow­er of con­vec­tors. The­o­ret­i­cal­ly, they are also suit­able for the main heat­ing sys­tems of a cot­tage or apart­ment, but we are not aware of exam­ples of the imple­men­ta­tion of this idea. Lin­ear pow­er of devices- from 127 to 720W per 1m length. Their dura­bil­i­ty, effi­cien­cy and ease of use are large­ly deter­mined by the design of the basic ele­ments.- gut­ters and heat exchang­er.

Con­vec­tor chute usu­al­ly has a reli­able anti-cor­ro­sion pro­tec­tion. Tra­di­tion­al­ly, it is made of “gal­va­niza­tion” with a poly­mer coat­ing, like the devices of KAMPMANN (Ger­many), KAUFMANN (Aus­tria), JAGA (Bel­gium) and a num­ber of oth­ers. ATrecent­ly there has been a fash­ion for gut­ters made of “stain­less steel”- OPLFLEX (Czech Repub­lic) has espe­cial­ly suc­ceed­ed in their pro­duc­tion. If the con­vec­tor is installed in the raised floor struc­ture, the qual­i­ty of the anti-cor­ro­sion pro­tec­tion of the mate­r­i­al from which the gut­ter is made is of no fun­da­men­tal impor­tance. Much more impor­tant is the qual­i­ty of the anti­cor­ro­sive gut­ter when installing the con­vec­tor in a cement-sand screed, espe­cial­ly when it comes into direct con­tact with the body (the alka­line envi­ron­ment of con­crete destroys the met­al). It makes sense to impose the most strin­gent require­ments on the qual­i­ty of the anti-cor­ro­sion pro­tec­tion of the gut­ter (mul­ti­lay­er poly­mer coat­ing or “stain­less steel”) in cas­es where the devices are intend­ed for a pool or win­ter gar­den, where, for quite objec­tive rea­sons, they can be flood­ed with water “to the very grate”. The hous­ings of the con­vec­tors used here must be pro­vid­ed with a drainage sys­tem with­out fail.

The dec­o­ra­tive grate is laid on an alu­minum or steel frame fixed to the edge of the gut­ter. If the grate is to be walked on, the sup­port­ing sur­face of the frame must be past­ed over with a damp­ing rub­ber plate (it is sup­plied as stan­dard or pur­chased sep­a­rate­ly). FROMIn order to save ener­gy and reduce the spread of sounds into the rooms locat­ed on the floor below, before installing the con­vec­tor, the out­er side of the gut­ter can be glued with foamed poly­eth­yl­ene.

heat exchang­er. Most often, con­vec­tors built into the floor are equipped with a cop­per-alu­minum heat exchang­er, that is, a cop­per tube pen­e­trat­ing a pack­age of rec­tan­gu­lar alu­minum plates in one or more pass­es. For the dura­bil­i­ty of the device, it is impor­tant how these thin plates are attached to the pipe. If they have a stamped flare that increas­es the con­tact area sev­er­al times (when look­ing at such heat exchang­ers from the side, it may seem that the plates “flow” onto the tube), then the heat exchang­er has a seri­ous chance to main­tain the effi­cien­cy of heat trans­fer to the room through­out the entire oper­a­tion time. The effi­cien­cy of heat trans­fer is increased if cor­ru­ga­tions are applied to the heat exchang­er plates (then they become sim­i­lar to slate strips). Very suc­cess­ful both in design and per­for­mance with a cop­per-alu­minum Low‑H heat exchang­er2O com­pletes its devices Mini Canal one of the rec­og­nized lead­ers in the pro­duc­tion of built-in con­vec­tors- com­pa­ny JAGA.

In addi­tion to cop­per-alu­minum, cop­per heat exchang­ers are used in the pro­duc­tion of built-in con­vec­tors. They are more expen­sive, but they are dis­tin­guished by increased cor­ro­sion resis­tance. So, in the devices of the Ger­man com­pa­ny MHLENHOFF (the man­u­fac­tur­er prefers to call them sys­tem con­vec­tors), the heat­ing ele­ment is a seam­less cop­per pipe, bent in sev­er­al rows, with cop­per plates sol­dered onto it. Anoth­er type of cop­per heat exchang­ers is used in OPLFLEX con­vec­tors. Here, the heat­ing ele­ment has a futur­is­tic design and is a con­tin­u­ous­ly twist­ed helix of cop­per wire with radi­al­ly con­verg­ing beams. Dif­fers in rather high dura­bil­i­ty and hygiene.

To make the inter­nal parts of the con­vec­tor invis­i­ble through the grill, the heat exchang­er, as well as the hous­ing, shut-off and con­trol valves, are cov­ered with dark paint. It also pro­vides anti-cor­ro­sion pro­tec­tion of the heat­ing ele­ment. This tech­nique is used by almost all man­u­fac­tur­ers of such equip­ment, only the col­or dif­fers slight­ly. For exam­ple, in con­vec­tors of the Breeze‑M brand from KZTO (with nat­ur­al con­vec­tion), all the insides are made black, so that it is impos­si­ble to dis­tin­guish indi­vid­ual parts through the grate. Atappli­ances from JAGA an anthracite gray anti­sta­t­ic coat­ing is used. The inter­nal sur­faces of the con­vec­tors and the OPLFLEX heat exchang­er are coat­ed with paint on spe­cial order. ATas stan­dard, these heaters are sup­plied with­out paint­ing the inter­nal sur­faces, which, accord­ing to the man­u­fac­tur­er, empha­sizes the spec­tac­u­lar appear­ance of the heat exchang­er.

For ease of instal­la­tion, the heat exchang­ers of built-in con­vec­tors are made both end (water can be brought to them from one side) and through pas­sages (water is sup­plied and dis­charged from dif­fer­ent sides). It is bet­ter, how­ev­er, if the heat exchang­ers are made ter­mi­nal. Since any con­vec­tor built into the floor auto­mat­i­cal­ly turns into a col­lec­tor for a wide vari­ety of debris (espe­cial­ly if the apart­ment is not reg­u­lar­ly cleaned), for the con­ve­nience of clean­ing the gut­ter, the heat trans­fer unit should be eas­i­ly removed from the hous­ing with­out dis­con­nect­ing from the heat­ing sys­tem and any oth­er com­plex oper­a­tions that require attract­ing high­ly qual­i­fied spe­cial­ists. For ref­er­ence: it is nec­es­sary to care­ful­ly clean the gut­ter with a vac­u­um clean­er month­ly, wet clean­ing should be done reg­u­lar­ly (at least once a year, before the start of the heat­ing sea­son). The mobil­i­ty of the end heat exchang­er of the con­vec­tor built into the floor is achieved by means of flex­i­ble con­nec­tions, which are includ­ed in the scope of sup­ply (as with Czech MINIB con­vec­tors) or pur­chased sep­a­rate­ly.

Room heat­ing con­trol. The heat out­put of a con­vec­tor with­out a fan can be con­trolled by chang­ing the amount of coolant flow­ing through it (“adjust­ment from the water side”). For this, a ther­mo­sta­t­ic head with a remote con­trol is designed.

Firm Coun­try Mod­el Type of heat exchang­er Ther­mal pow­er, W* Height,mm Width,mm Length,mm Price, **
KAMPMANN Ger­many Katherm NK, NKV cop­per-alu­minum 108‑4707 92.120, 150 182, 272, 400 850‑4750 245‑1666
OPLFLEX Czech FLK and FLK Canal cop­per wire 95–5668 90, 115, 140, 180, 300 170, 300, 320, 360, 420 800‑4800 350‑3371
MHLENHOFF Ger­many SK cop­per lamel­lar 186‑2769
(t water= 80FROM)
90, 110 180, 320, 410 1000–5000 195‑1608
MINIB Czech Coil‑R/RT, RO cop­per-alu­minum 299‑1507
(t water= 80FROM)
120, 125, 130 243, 303 900‑3000 341‑1020
JAGA Bel­gium Mini Canal cop­per-alu­minum 141‑3820 90, 110, 140, 190 140, 180, 260, 340, 420 1100–4500 233‑1587
IMP KLIMA Slove­nia TC cop­per-alu­minum 236‑2097
(t water= 100FROM)
No data 200, 300, 400 950‑2750 250–828
KZTO Europe “Breeze” cop­per-alu­minum 248‑4600 83, 123 200, 260, 380 800‑5000 118‑1003
“ISOTHERM” Europe “Warm track” cop­per-alu­minum 310‑1690 90, 190 270, 430 900‑2700 197–788
*- tem­per­a­ture dif­fer­ence 75/65C, room tem­per­a­ture 20FROM;
**- the price of the device in the min­i­mum con­fig­u­ra­tion (with a roll-up alu­minum grille in nat­ur­al col­or)

MHLENHOFF
In con­vec­tors MHLENHOFF:
a- a gut­ter assem­bled from alu­minum plates;
b- a dec­o­ra­tive lat­tice from strong plas­tic;
in- pure cop­per heat exchang­er

Con­vec­tors with­out fans work accord­ing to the fol­low­ing prin­ci­ple: cold air flows into the chute, under the heat exchang­er, where it begins to heat up and rise into the room
Barred warmthThe author of the project N.Kuznetso­va
Pho­to by E.Fram­pol
Barred warmthTher­mo­sta­t­ic head with remote con­trol reg­u­lates the room tem­per­a­ture

The heat out­put of built-in con­vec­tors with fans, reduced to one meter of length, is in the range of approx­i­mate­ly 100W when the fan is off (the device heats the room due to nat­ur­al con­vec­tion) up to 1200W or more if the fans are run­ning at max­i­mum speed. (The fan itself con­sumes only a few tens of watts of elec­tric­i­ty per hour.) Con­vec­tors of this group are used for both main and aux­il­iary heat­ing of premis­es for var­i­ous pur­pos­es, in par­tic­u­lar, in cas­es where the heat out­put of devices with nat­ur­al con­vec­tion is not enough. Some­times this equip­ment is used to form a cold air cur­tain at the sur­face of the win­dows under which it is installed. The cur­tain pre­vents heat trans­fer to the room air from the sur­faces of glass and frames heat­ed by the sun. This is the so-called “light” air con­di­tion­ing, which is felt only in the area where the con­vec­tors are locat­ed. In prac­tice, it is used only in cot­tages equipped with a cen­tral air con­di­tion­ing sys­tem, if there is a source of cold water (chiller, arte­sian well or oth­er) with a tem­per­a­ture of 6–8C, as well as the pos­si­bil­i­ty of orga­niz­ing con­den­sate drainage.

When choos­ing floor-mount­ed con­vec­tors with a fan, it is log­i­cal to pay extra atten­tion to the qual­i­ty of the fans and the pos­si­bil­i­ties of heat out­put con­trol sys­tems.

Fans. Most often, in con­vec­tors built into the floor, you can find the so-called tan­gen­tial fans (in the amount of 1–4, depend­ing on the length of the device). Struc­tural­ly- these are elec­tric motors, to which long “rolling pins” are attached on one or both sides- impellers. The device is installed par­al­lel to the heat exchang­er. Tan­gen­tial fans cre­ate a flat, homo­ge­neous air flow of large width, which ensures uni­form air­flow to the heat exchang­er. The design of the devices allows them to be put in a pro­tec­tive cas­ing that pro­tects them from for­eign objects, and to install a fil­ter at the inlet to clean the air from coarse dust (as in con­vec­tors JAGA). Some man­u­fac­tur­ers make tan­gen­tial fans eas­i­ly remov­able, which facil­i­tates the gen­er­al clean­ing of the con­vec­tor chute (for exam­ple, in OPLFLEX the fan is attached to the chute with Vel­cro). The impeller, as a rule, is well bal­anced and mount­ed on rub­ber vibra­tion dampers.

Axi­al (axi­al) fans out­ward­ly do not dif­fer from those used in per­son­al com­put­ers. These devices have good mois­ture pro­tec­tion, are installed in pairs (oppo­site each oth­er) next to the heat exchang­er and car­ry out its local blow­ing and inten­si­fi­ca­tion of the heat exchange process. The dis­ad­van­tage of axi­al fans is that they are not able to pro­vide uni­form blow­ing of the heat­ing ele­ment.

Radi­al fans (one, max­i­mum two) are installed in the end part of the con­vec­tor. Their advan­tage is the abil­i­ty to cre­ate a pow­er­ful air flow, which allows you to orga­nize inten­sive heat­ing of the room. Out­ward­ly, the radi­al fan looks like a snail shell. FROMwith its help, air is forced into the bot­tom part of the chute and, through the struc­tur­al ele­ments of the hous­ing, is fed under the heat exchang­er. Wide­spread use of radi­al fans is prob­a­bly restrained by a rather high lev­el of aero­dy­nam­ic noise gen­er­at­ed by them (the blades strong­ly “hit” the air). True, with a com­pe­tent study of the design, this dis­ad­van­tage is min­i­mized. For exam­ple, in con­vec­tors MHLENHOFF fan unit is sound-insu­lat­ed. All ele­ments of the hull design also con­tribute to a sig­nif­i­cant improve­ment in aero­dy­nam­ic char­ac­ter­is­tics. Let’s say the heat exchang­er is placed on a plas­tic stand, designed as a flat noz­zle for cold air intake and pro­filed for max­i­mum con­vec­tion.

Note that the lev­el of noise gen­er­at­ed by con­vec­tor fans is of para­mount impor­tance for some buy­ers, espe­cial­ly when choos­ing appli­ances for liv­ing rooms. After all, sound stim­uli have a neg­a­tive, often depress­ing effect on the human ner­vous sys­tem. It must be borne in mind that the rela­tion­ship between fan speed, heat­ing out­put and noise is not lin­ear.- the noise of the equip­ment grows much more sharply than the heat­ing pow­er. There­fore, man­u­fac­tur­ing com­pa­nies usu­al­ly rec­om­mend select­ing con­vec­tors accord­ing to the pow­er they devel­op at par­tial (from 50 to 80%) fan per­for­mance. For exam­ple, OPLFLEX, based on the prac­tice of instal­la­tion and oper­a­tion of its devices, pro­pos­es to con­duct ther­mal cal­cu­la­tion at the low­est fan speed for bed­rooms and at the aver­age num­ber of rev­o­lu­tions for rooms with day­time oper­a­tion, such as liv­ing rooms, kitchens. The fans of built-in con­vec­tors should be turned on at max­i­mum speed only in cas­es where it is nec­es­sary to increase the air tem­per­a­ture in the room real­ly very quick­ly. Com­pa­ny JAGA gen­er­al­ly does not rec­om­mend installing con­vec­tors with fans in liv­ing rooms.

ToUnfor­tu­nate­ly, the data pro­vid­ed by the man­u­fac­tur­er on the noise lev­el for the aver­age buy­er is usu­al­ly not enough. In addi­tion, the infor­ma­tion pro­vid­ed is not always reli­able, espe­cial­ly in adver­tis­ing book­lets. Each per­son per­ceives noise in his own way, and plus, two iden­ti­cal con­vec­tors (due to indi­vid­ual design fea­tures) can dif­fer sig­nif­i­cant­ly in noise.

For dry rooms, built-in con­vec­tors are used, the fan motor of which is pow­ered by a mains volt­age of 220, 24 or 12C. Suit­able, for exam­ple, mod­ern devices “IZOTERM” (Europe), equipped with tan­gen­tial fans for 220B. Ahere in rooms with high humid­i­ty, built-in con­vec­tors with fans designed for 12 or 24B, the elec­tric motor of which is pro­tect­ed from mois­ture pen­e­tra­tion (degree of pro­tec­tion IP65). For exam­ple, the OPLFLEX com­pa­ny installs mois­ture-proof axi­al fans for 12B, the design of which also pro­vides for “par­tial flood­ing”. MINIB equips its entire line of built-in con­vec­tors with tan­gen­tial fans, their elec­tric motors are dri­ven by a volt­age of 12B. Con­vec­tors JAGA for dry and wet rooms equipped with fans for 24AT.

Space heat­ing con­trol. The reg­u­la­tion of con­vec­tors with a fan is usu­al­ly car­ried out by chang­ing the air sup­ply of the fan into the cas­ing of the appli­ance (“adjust­ment from the air side”). ATAs a result, it is pos­si­ble to main­tain the air tem­per­a­ture in the room at a giv­en lev­el, depend­ing on the method of flow con­trol.

The eas­i­est way to imple­ment this method is to turn the fan on and off. ATthis case is used ther­mo­stat (e.g. Eber­leRTR6121) locat­ed at the con­trol point of the room and, depend­ing on the tem­per­a­ture needs, turns on and off the fan(s) in the con­vec­tor body.

Of course, it is not always pos­si­ble to “turn on” the fan at full pow­er (for exam­ple, in the bed­room at night). If noise require­ments are crit­i­cal, it is sug­gest­ed to use a more advanced step con­trol sys­tem, which allows you to man­u­al­ly set the flow rate, and con­se­quent­ly, the inten­si­ty of heat­ing the room. This sys­tem allows you to turn on the con­vec­tor at a speed pre-set by the user (select­ed using the switch lever). ATthe com­po­si­tion of the three-stage reg­u­la­tor, in addi­tion to the ther­mo­stat locat­ed on the wall of the room, also includes an auto­trans­former and a switch.

Third lev­el- auto­mat­ic step speed con­trol. This sys­tem itself deter­mines when a low speed is suf­fi­cient, and when it is nec­es­sary to use an increased speed for the rapid heat­ing of the room. The most impor­tant advan­tage of this con­trol method is a sig­nif­i­cant reduc­tion in tem­per­a­ture fluc­tu­a­tions, which is due to the ther­mal iner­tia of the heat­ing sys­tem.

Final­ly, the high­est lev­el of com­fort pro­vides mod­u­lat­ing con­trol sys­tem. The micro­proces­sor con­trol unit allows you to very accu­rate­ly main­tain the air tem­per­a­ture in the room, pre­vent­ing exces­sive con­sump­tion of ther­mal and elec­tri­cal ener­gy. At the same time, the micro­proces­sor can mon­i­tor not only the air tem­per­a­ture in the room at the moment, but also the tem­per­a­ture out­side and many oth­er para­me­ters. Sim­i­lar con­trol sys­tems, the pos­si­bil­i­ties of which could well be writ­ten in a sep­a­rate arti­cle, are sup­plied in con­vec­tors of com­pa­nies JAGAOPLFLEX and KAMPMANN.

Firm Coun­try Mod­el Pur­pose Type of heat exchang­er Fan type Height,mm Width,mm Length,mm Price,
JAGA Bel­gium Cli­ma Canal Space heat­ing and cool­ing cop­per-alu­minum Tan­gen­tial, 24AT 85 170 570‑1770 516‑1274
KAMPMANN Ger­many Katherm QK Space heat­ing cop­per-alu­minum Tan­gen­tial, 220AT 112 272, 340, 400 1250–3250 975‑3026
Katherm GK Space heat­ing cop­per-alu­minum Radi­al, 220AT 112 182, 272, 400 1250–5000 1051–3128
OPLFLEX Czech FLT Space heat­ing cop­per wire Tan­gen­tial, 220AT 70, 85, 90, 115 150.270, 320, 400 800‑4800 727‑4866
FLC Space heat­ing and cool­ing cop­per-alu­minum Tan­gen­tial, 220AT 140 360 1200–2000 400‑2500
FLB Heat­ing of swim­ming pools, win­ter gar­dens cop­per wire Axi­al, 12AT 125 270 800‑4800 1204–4183
MHLENHOFF Ger­many GSK Space heat­ing cop­per lamel­lar Radi­al, 220AT 110 180, 320 1000–5000 655‑1990
MINIB Czech Coil-KT Space heat­ing cop­per-alu­minum Tan­gen­tial, 12AT 130 303 900‑3000 718‑1829
Coil-KO2 Heat­ing and cool­ing rooms with high humid­i­ty cop­per-alu­minum Tan­gen­tial, 12AT 151 387 900‑2000 822‑1527
Coil-T60 Space heat­ing cop­per-alu­minum Tan­gen­tial, 12AT 63 258 900‑2000 720‑1528
IMP KLIMA Slove­nia TKV Space heat­ing cop­per-alu­minum Tan­gen­tial, 220AT No data 200, 300, 400 950‑2750 500‑1578
KZTO Europe “Breeze‑V” Space heat­ing cop­per-alu­minum Tan­gen­tial, 220AT 123 260 800‑5000 259‑1457
“ISOTHERM” Europe “Warm track” Space heat­ing cop­per-alu­minum Tan­gen­tial, 220AT 110 270 900‑2700 517‑1378

The edi­tors would like to thank the com­pa­nies “TERMOROS”, “GLAVOOBJECT”, “IZOTERM”, JAGA for help with film­ing.

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