Heat in motion

“DOME“
Heat guns TVK “Barkhan” (“KUPOL”) for heat­ing and dry­ing large rooms

ERMETE
ERMETE
GENERAL
Fan heaters should nev­er be placed next to uphol­stered fur­ni­ture and wood­en objects. Due to over­heat­ing, the uphol­stery fab­ric may ignite and cause a fire.

GENERAL
VITEK
On the shelves of stores today you can find mod­els of heat-fans of var­i­ous shapes and col­ors.

GENERAL
Fan heater MIRAL

Archi­tects
A. Vyazmi­nov,
O. Grishi­na
Pho­to by V. Nefe­dov

EWT
VITEK
Any mod­ern ther­mal fan should have reli­able pro­tec­tion against over­heat­ing.

Fan heater NW-15 (GENERAL) has a pow­er of 1.5 kW

GENERAL

POLARIS
POLARIS
The fan heater PCSH 0320 RC has 2 kW con­trol units locat­ed in the upper part of the hous­ing. There is a remote con­trol

TEV‑3 (“ARKTOS”) with a capac­i­ty of 3 kW. The device is con­trolled from its front pan­el

DOME

FRICO
One portable heat gun, in prin­ci­ple, can heat an apart­ment up to 300m2 (30 kW mod­els- Not unusu­al). How­ev­er, in prac­tice, in every­day life, main­ly sin­gle-phase devices for 2–8 kW are used. More pow­er­ful tech­nique- three-phase; it can­not be con­nect­ed to the elec­tri­cal net­work of the home

082021T (DELONGHI)

Ultra-mod­ern com­pact oil­ers: a‑PRE O (POLARIS); b‑TRN (DELONGHI)

Archi­tect
M. Stepano­va
Pho­to by K. Dubovets

Easy to oper­ate and eco­nom­i­cal car­bon heater PKSH 0209 RC (POLARIS) on a swiv­el stand

POLARIS
VITEK
Mod­ern halo­gen heaters pro­vide not only warmth, but also soft dif­fused light that is quite pleas­ant for the eyes. Appli­ances rotate and even­ly heat the entire room

Portable quartz heater UFO 18001.8 kW (NNR) pro­vides fast and high­ly effi­cient zone heat­ing of rooms or open spaces

Portable elec­tric heater- a very use­ful thing. ATin a city apart­ment, many peo­ple feel the need for such a device all year round: in a snowy frosty win­ter- if the pow­er received from the city heat­ing net­work is clear­ly not enough; spring, sum­mer and autumn- when it’s cold out­side and the heat­ing isn’t work­ing.

Project Man­ag­er
A. Klin­skikh
Pho­to by V. Nefe­dov
The warm­ing “breath” of a mod­ern fan heater in the room is notice­able even at a con­sid­er­able dis­tance. In our opin­ion, elec­tric heaters are the most suit­able for a mod­ern apart­ment: fan heaters, oil-filled (oil) and infrared heaters. “Oil­ers” are espe­cial­ly good for addi­tion­al heat­ing of rooms (when the house is chilly due to the fact that the bat­ter­ies are a lit­tle warm), as well as for tem­po­rary main heat­ing (in case of a sud­den shut­down of heat­ing in the event of an acci­dent)- They heat the air very effec­tive­ly in the vol­ume of the entire room. ATfan heaters and infrared heaters are used for the same pur­pos­es, how­ev­er, their main strong point- zon­al heat­ing (for exam­ple, rais­ing the tem­per­a­ture at the work­place at the desk in the office). Portable elec­tric con­vec­tors, which can some­times be found in stores sell­ing house­hold appli­ances, are also quite appro­pri­ate in an apart­ment. But still, they show them­selves bet­ter in a sta­tion­ary instal­la­tion, say, in a coun­try house, where they can be used to orga­nize a sys­tem of main or addi­tion­al heat­ing.

Time to choose

Before you go to the near­est store or to the con­struc­tion mar­ket, you need to under­stand whether a portable appli­ance can sat­is­fy your need for heat. Let’s cal­cu­late the ther­mal pow­er that your heater should have. The area of ​​the heat­ed room (rooms), mea­sured in square meters, is mul­ti­plied by 100Tue The cal­cu­la­tion results will be quite accu­rate if the ceil­ing height is 2.7–3m. (So, for a room of 20m2 in a brick or pan­el house that you are going to heat, a 2 kW appli­ance will do.)

How­ev­er, not every­thing is so clear. If the room has a high ceil­ing (up to 4.5–5m) and it is quite cold there- in the win­dows there are gaps as thick as a fin­ger, and besides, they face north,- it is bet­ter to pur­chase a device about 50% more pow­er­ful than the cal­cu­la­tions showed. On the con­trary, if very lit­tle heat is required, since the room is well insu­lat­ed and mod­ern win­dows with dou­ble-glazed win­dows are installed in it, then you can ignore this rule and pur­chase equip­ment with a capac­i­ty of 20–30% low­er than the cal­cu­lat­ed one.

Fan heaters VT-1741 with elec­tron­ic con­trol and ceram­ic heaters (VITEK) If the ther­mal pow­er obtained as a result of the cal­cu­la­tion exceeds 2.5–3 kW, we strong­ly rec­om­mend that you study the pos­si­bil­i­ties of elec­tri­cal wiring in your apart­ment before buy­ing. ATin old-built hous­es, it is “weak”, and the plugs are reg­u­lar­ly knocked out when an iron or oth­er ener­gy-inten­sive elec­tri­cal appli­ance is turned on. ATIn this case, too pow­er­ful a device is con­traindi­cat­ed. You must first resolve the issue of lay­ing the pow­er cable from the shield on the stair­well to the apart­ment. It is not always pos­si­ble to do this legal­ly due to the lack of elec­tri­cal pow­er, espe­cial­ly if the house is locat­ed in the his­tor­i­cal part of the city or is an archi­tec­tur­al mon­u­ment.

It is bet­ter to refrain from buy­ing an elec­tric heater if you can­not ensure its safe oper­a­tion. As trite as it sounds, it is a vital con­di­tion. A moment of care­less­ness- and the fire will destroy all the prop­er­ty in the house, besides, there will be a real threat to human life.

This oil heater of the 19th series (DELONGHI) is some­what rem­i­nis­cent of … a pen­guin It is hard­ly worth con­sid­er­ing a heater sole­ly as an ele­ment of inte­ri­or dec­o­ra­tion- in such a case, it is easy to acquire a com­plete­ly unnec­es­sary thing. Prag­mat­ic buy­ers often decide to pur­chase a heater based on its price, noise lev­el dur­ing oper­a­tion (espe­cial­ly if the device is sup­posed to be turned on in a bed­room or office), weight (heavy devices are not easy to move, espe­cial­ly for sick and elder­ly peo­ple). Some­times dimen­sions become deci­sive: in small apart­ments full of fur­ni­ture for large appli­ances, there is often no place either dur­ing oper­a­tion or dur­ing stor­age, espe­cial­ly if there is no rel­a­tive­ly free stor­age room or garage. For oth­er cus­tomers, the abil­i­ty to oper­ate the elec­tric heater around the clock is of para­mount impor­tance. If any of these indi­ca­tors are for you- deter­min­ing, then when choos­ing equip­ment, you can use the table giv­en in the arti­cle, in which the types of devices are eval­u­at­ed accord­ing to the degree of com­pli­ance with the list­ed cri­te­ria using a 4‑point scale: 1- excel­lent, 2- good, 3- sat­is­fac­to­ry, 4- unde­sir­able.

Spec­tac­u­lar floor mod­el (UFESA), equipped with a spi­ral heater So, you have cho­sen the type of equip­ment, now you can con­sid­er the spe­cif­ic mod­els of equip­ment avail­able for sale in your city. To do this, you should look into large super- and hyper­mar­kets. Euro­pean-made heaters are almost always avail­able in hard­ware stores. BUTHere, import­ed elec­tric heaters in the most com­plete assort­ment are usu­al­ly pre­sent­ed in brand­ed stores of whole­sale and retail com­pa­nies sell­ing cli­mate equip­ment. If you are at odds with a com­put­er, it is pos­si­ble to buy a heater through the World Wide Web- in the online store. Such a pur­chase can be very prof­itable from a finan­cial point of view, how­ev­er, you have the right to be biased towards check­ing the qual­i­ty of the goods that the couri­er will bring to your home or office. ATIn any case, upon pur­chase, the device must be test­ed in all modes, make sure that the war­ran­ty card is cor­rect­ly filled out. It would be use­ful to ask the sell­er where the near­est ser­vice cen­ter is locat­ed,- after all, heat­ing equip­ment some­times fails. It is con­ve­nient when a repair shop is near­by, or at least in your city.

Next, we will talk in more detail about the design and oper­a­tional fea­tures of the mod­els of fan heaters, oil heaters and infrared heaters on the mar­ket.

Assessment of criteria influencing the choice of heating equipment

Instru­ment type/criteria fan heater oil heater infrared heater
Min­i­mum price one 3 2
Min­i­mum noise 3 one* 2
Min­i­mum weight one 3 2
Com­pact dimen­sions one 3 2
Pos­si­bil­i­ty of round-the-clock use four 3 four
*- mod­els with­out built-in fan heater

forced heating

Archi­tect M. Stepano­va Pho­to by K. Dubovets
In sum­mer, a fan heater with the heater turned off is often used as a reg­u­lar fan.

Desk­top house­hold fan heaters can be placed both on the table and on the floor. These mod­els- the most pop­u­lar and sold. Devices are pre­sent­ed in stores in the widest range. Accord­ing to the inter­nal struc­ture, they are very sim­i­lar to each oth­er and dif­fer pri­mar­i­ly in their appear­ance. their bod­ies are made in the form of high (up to 30cm) or, con­verse­ly, flat­tened (no more than 10cm) a box, an elon­gat­ed cylin­der, a bizarrely deformed sphere, andt.etc. If you want the fan heater to serve as one of the notice­able ele­ments of the inte­ri­or, then it is log­i­cal to choose a mod­el in a plas­tic case. They usu­al­ly have the most intri­cate design, fin­ish col­or- white, black or metal­lic. BUTif first- prac­ti­cal­i­ty and reli­a­bil­i­ty, it is bet­ter to buy a device in a case made of steel sheet.

The “range” of the jet of warm air for desk­top mod­els with an axi­al impeller is usu­al­ly min­i­mal (no more than 1–1.5m). Through these devices, heat­ed air enters from the rear, and exits, already heat­ed, from the front. BUTHere, in more noisy mod­els of desk­top fan heaters with a cen­trifu­gal impeller, air from the room enters through the upper or low­er grille, and exits only through the front one. The “range” of the jet in this case reach­es 2–3m. To change the direc­tion of air­flow of a desk­top fan heater with­out touch­ing the device once again, you can pur­chase a mod­el with an auto­mat­ic swiv­el stand, which pro­vides a hous­ing rota­tion sec­tor of up to 180.

Desk­top fan heaters are sup­plied to our coun­try by BALLU (Tai­wan), GENERAL (Nether­lands), DELONGHI, OMAS (Italy), POLARIS (Great Britain), EWT (Ger­many), SATURN (Czech Repub­lic), VITEK (Aus­tria), VEAB (Swe­den), ” ELARA” (Europe). Mod­els with spi­ral heaters- the most demo­c­ra­t­ic in price: they cost 280‑1000rub. Ceram­ic “table­tops” are more expen­sive- 500‑1800rub.

Floor stand­ing house­hold fan heaters deserve the atten­tion of buy­ers, despite the fact that they have not yet received a suf­fi­cient­ly wide dis­tri­b­u­tion. These mod­els warm up the whole room well, includ­ing its low­er zone. Often they become an inte­ri­or dec­o­ra­tion. For exam­ple, floor mod­els PCSH 0320 RC and PCSH 0420 RCD (POLARIS) cost 1.8–20 $. Out­ward­ly, they very much resem­ble a col­umn with a height of about 70cm and a diam­e­ter of approx­i­mate­ly 15cm mount­ed on an auto­mat­ic swiv­el stand (swiv­el sec­tor- 60). Inside such devices, a diame­tral fan is mount­ed, which com­bines the advan­tages of axi­al and cen­trifu­gal fans (low noise lev­el, high per­for­mance and large “range” of the jet), and a ceram­ic heater. Floor mod­els are avail­able from EWT, VITEK andoth­ers

Portable heat gun (“URAL-MIKMA-TERM”) in a durable, light­weight and com­pact case ANDfinal­ly, heat guns. The use of these pow­er­ful fan heaters in every­day life is lim­it­ed. ATcity ​​apart­ment, this equip­ment is appro­pri­ate to use dur­ing repairs- for accel­er­at­ed dry­ing of paint­ed walls, final dry­ing of plas­ter andt.It can also be used to cre­ate an out­door ther­mal com­fort zone.

Of the domes­tic man­u­fac­tur­ers of such equip­ment, it should be not­ed the com­pa­nies “TROPIK”, “ELARA”, “ECONICA-TECHNO”, “NOVEL”, “ARKTOS”, “INNOVENT”, “FAVORIT”, “ELECTROPECH”. For­eign firms pro­duc­ing guns,- this is pri­mar­i­ly FRICO, SYSTEMAIR, VEAB (Swe­den). The cost of domes­tic portable mod­els is 380‑1300rub. for 1 kW of pow­er; import­ed ones are more expen­sive- 765‑2700rub./kW.

It should be not­ed that the cost of an elec­tric fan heater large­ly depends on the degree of per­fec­tion of its con­trol and pro­tec­tion sys­tem. Athouse­hold fan heaters and heat guns automa­tion can be electro­mechan­i­cal or elec­tron­ic. All the ele­ments of reg­u­la­tion and pro­tec­tion includ­ed in its com­po­si­tion are built direct­ly into the body of the device.

Atsim­ple mod­els of desk­top fan heaters- electro­mechan­i­cal: a pow­er switch is installed on the case, some­times with a light bulb- an on indi­ca­tor, as well as a step heater pow­er reg­u­la­tor and (or) a bimetal­lic ther­mo­stat. The pow­er reg­u­la­tor allows you to select the heat­ing pow­er (that is, in fact, the speed of heat­ing the room). ATOn desk­top fan heaters, the con­trol often also has a “0” posi­tion (cool air mode) when the heater is off and the fan assem­bly is run­ning. Such mod­els are used in the sum­mer- as an “elec­tric fan”. Heat­ing can be lim­it­ed at a lev­el from 0 to 35–40 ° C, but the user of the fan heater with electro­mechan­i­cal con­trol deter­mines the tem­per­a­ture val­ue “by feel­ing”, in accor­dance with his sub­jec­tive per­cep­tion of com­fort (there is no tem­per­a­ture scale on the reg­u­la­tor knob).

Project man­ag­er A. Klin­skikh Pho­to by V. Nefe­dov
An oil-filled radi­a­tor grad­u­al­ly fills the room with gen­tle warmth. ATan arm­chair next to it is pleas­ant to take a break from busi­ness: read a news­pa­per or drink tea. Floor-stand­ing oil radi­a­tors have a capac­i­ty of 0.9–2.5 (less often- up to 3) kW. They are used most often for addi­tion­al heat­ing of air in the vol­ume of the entire room. With reli­able wiring, they can also tem­porar­i­ly take over the func­tion of the main heat­ing of rooms (for exam­ple, in the coun­try). “Oil­ers” in EU- per­haps one of the most com­mon types of portable heat­ing devices; peo­ple have been using them for decades. ToThe advan­tages of high-qual­i­ty heaters include a low heat­ing tem­per­a­ture of the body (about 50–65C), which elim­i­nates the dis­ad­van­tages inher­ent in fan heaters with spi­ral heaters,- say, the appear­ance of the smell of burnt dust. These devices are very durable.- Sol­id mod­els work with­out prob­lems for sev­er­al days in a row.

Out­ward­ly, the sim­plest oil cool­er is very sim­i­lar to a steam heat­ing bat­tery (how­ev­er, mod­els released in recent years are los­ing this sim­i­lar­i­ty more and more). In fact, his body- this is a sealed con­tain­er, in the low­er part of which a heat­ing ele­ment is installed, which heats the oil in it. The met­al case of the device heats up from the oil. Well, the air in the room, in turn, heats up, pass­ing near the warm ribs of the oil cool­er hous­ing, and also as a result of con­tact with the sur­faces of fur­ni­ture and walls (they “absorb” the heat com­ing from the sur­face of the radi­a­tor in the form of ther­mal radi­a­tion).

Met­al Shroud­ed Radi­a­tor (UFESA) The main dis­ad­van­tage of most oil cool­ers- their iner­tia. The aver­age device warms up to an oper­at­ing tem­per­a­ture of about 20–30min. How­ev­er, many man­u­fac­tur­ers are tak­ing sig­nif­i­cant steps to increase the inten­si­ty of heat­ing. To speed up the spread of warm air, a spe­cial cas­ing was mount­ed on the radi­a­tor fins.- not closed from below and with holes in the upper part. The chan­nels formed between the sur­face of the cas­ing and the ribs of the sec­tions cre­ate a draft that speeds up the cir­cu­la­tion of cold and warm air flows (“chim­ney effect”). Due to this, heat trans­fer increas­es: the speed of dis­tri­b­u­tion of warm air is almost dou­bled com­pared to nor­mal. Some mod­els are equipped with fan heaters, which imme­di­ate­ly begin to sup­ply warm air, while heat­ing ele­ments heat up the oil. ATAs a result, these devices heat the room much faster than con­ven­tion­al “oil­ers”. AToil radi­a­tors of the Rapi­do series (DELONGHI) use two heat­ing ele­ments: one, as usu­al, is immersed in oil, and the oth­er is locat­ed in the low­er part of the body, under the cas­ing. While the first heat­ing ele­ment heats up the oil, the sec­ond one starts heat­ing the air. To acti­vate the fast heat­ing mode, just press a spe­cial but­ton.

Anoth­er imper­fec­tion of oil cool­ers- a large mass. A device with a pow­er of 2.5 kW may well “pull” 12–13kg.In order to some­how alle­vi­ate the fate of the user, the devices are mount­ed on small wheels and equipped with a han­dle, with which it is easy to move them from one room to anoth­er.

Atoil cool­ers have two or three pow­er modes (the mode switch is usu­al­ly placed on the instru­ment pan­el). This is con­ve­nient if the device is sup­posed to be used in rooms of dif­fer­ent sizes. Oil cool­ers main­tain the set tem­per­a­ture with an accu­ra­cy of 1–2C. True, it is nec­es­sary to set the required para­me­ter by eye, since the tem­per­a­ture con­troller sen­sor of these devices, as a rule, mea­sures the tem­per­a­ture of the oil in the tank. It auto­mat­i­cal­ly switch­es the device on and off depend­ing on whether the set oil tem­per­a­ture has been reached or not. Some radi­a­tors are equipped with a 24-hour on and off timer. This func­tion allows you to pro­gram the heater to start or end work at a cer­tain time (for exam­ple, warm up the room when the own­er arrives).

In order not to trip over the heater in the bed­room at night, the pow­er mode switch on its body is back­lit. There are few mod­els with remote con­trol; Of these, Drag­on 3 (DELONGHI) should be not­ed.

UFESA
An oil radi­a­tor with a built-in fan heater quick­ly heats up the room imme­di­ate­ly after turn­ing on the device. Among the man­u­fac­tur­ers of oil heaters, we high­light ATMOR (Israel), POLARIS, DELONGHI. Of inter­est are the prod­ucts of UFESA (Spain), THOMAS, ROWENTA (Ger­many), BINATONE (Cana­da), BALLU, VITEK, GENERAL, EWT. Undoubt­ed­ly, the equip­ment of SCARLETT (Great Britain), WHIRLPOOL (USA), OMAS (Italy), FIRST (Aus­tria), TESY (Bul­gar­ia), VIGOR, BORK (Ger­many), “AVEST” (Europe) com­pa­nies deserves atten­tion. A device with­out bells and whis­tles, with the most prim­i­tive con­trol sys­tem can be pur­chased for 1290–1850rub. Oil cool­ers with a spe­cial cas­ing, such as the Drag­on (DELONGHI) mod­els, are more expen­sive- 2.3–3.70 $. The pres­ence of a built-in fan heater will increase the cost of an oil heater by approx­i­mate­ly 350–700rub. Will affect price and timer- a heater equipped with it will cost 200–850rub. more expen­sive than the base ver­sion.

similar to the sun

POLARIS
Portable infrared heaters (also called mycother­mal) are eco­nom­i­cal, safe and durable. Their ser­vice life can reach 20years It is typ­i­cal that when using infrared heaters, the tem­per­a­ture felt by a per­son is high­er than the actu­al air tem­per­a­ture in the room. This effect is achieved by direct absorp­tion of ener­gy from the device. BUTsince this is so, there is no need to over­heat the air.

Infrared heaters- The devices are quite light. They weigh 2.5–4kg.The basis of the design of most mod­els is the emit­ter- usu­al­ly a tubu­lar heat­ing ele­ment- and a reflec­tor made of pol­ished steel or alu­minum, focus­ing the rays in the desired direc­tion. ATquartz, halo­gen and car­bon lamps are often used as an emit­ter. The fil­a­ment in quartz and halo­gen lamps is made of tung­sten, and in a car­bon lamp- car­bon fiber. The infrared ener­gy of the heat­ed fil­a­ment heats up the lamp tube, the sur­face of which, in turn, begins to emit a stream of infrared ener­gy. Halo­gen lamps pro­duce infrared radi­a­tion and light. BUThere are quartz and car­bon

POLARIS
This “oil­er” is sup­ple­ment­ed with a halo­gen heater, which quick­ly rais­es the tem­per­a­ture in the part of the room irra­di­at­ed by it, even in the absence of lamp heat­ing.- prac­ti­cal­ly only IR radi­a­tion.

Mod­el PHSH 0416 RS (POLARIS)- an exam­ple of a four-lamp halo­gen heater with four heat­ing modes and a max­i­mum heat out­put of 1.6 kW. The case of this device is a flat rec­tan­gu­lar pan­el with a pro­tec­tive grid on the front side. It is mount­ed on a swiv­el stand. The body rota­tion func­tion is pro­vid­ed, which prac­ti­cal­ly does not heat up dur­ing oper­a­tion. There is a timer with an off delay of 7.5h, touch pan­el and remote con­trol. The mod­el looks very attrac­tive, espe­cial­ly in the dark: the light of four halo­gen lamps resem­bles the reflec­tions of a fire in a fire­place. The cost of this device is 1.5–1.70 $. Oth­er com­pa­nies also sup­ply halo­gen heaters to Europe. Mod­els 9735N1W (ELTA, Ger­many), VT-1750 (VITEK), RH06, HH19A, HH10, HH21, HH21R (GENERAL) can be not­ed.

An exam­ple of a quartz heater is the floor mod­el VT-1751 (VITEK). This device resem­bles a small LCD TV- a rec­tan­gu­lar box with round­ed cor­ners mount­ed on a swiv­el stand. The device has two quartz lamps and two pow­er lev­els. Its cost- about 900rub.

Heat in motion AIRCOMFORT
Car­bon Fiber Heater AD-H900R Typ­i­cal Rep­re­sen­ta­tives of Car­bon Infrared Heaters- devices man­u­fac­tured by AIRCOMFORT (Italy). The her­met­i­cal­ly sealed tube enclos­ing the car­bon fiber fil­a­ment is housed in a steel hous­ing in the form of a cone (mod­el AD-H900R) or a cylin­der with an open seg­ment (AD-F1200R). Not so long ago, the AD-1500 R mod­el entered the mar­ket- also in a cylin­dri­cal body, but it already has two car­bon lamps. Instru­ment con­trol is very sim­ple. FROMusing the reg­u­la­tor, depend­ing on exter­nal con­di­tions, full or half pow­er is set. The case is able to rotate rel­a­tive to the stand by 180o, which allows you to heat every­one in the room. You can manip­u­late the heater both from the touch pan­el and from the remote con­trol, which oper­ates at a dis­tance of up to 5m from the device. Includes over­heat­ing pro­tec­tion and tip-over shut­down. The cost of devices is 3–3.50 $.

In addi­tion to AIRCOMFORT equip­ment, oth­er car­bon heaters should be not­ed. Note­wor­thy, for exam­ple, is the PKSH 0209 RC (POLARIS) mod­el. The NS-1200G (GENERAL), as well as the per­ma­nent­ly installed Euro­pean-made mod­el, is dis­tin­guished by an unusu­al design.- “Makar TOR” (ther­mal heater reflex), pro­duced by the com­pa­ny “EKONIKA-TECHNO” (price- 3.90 $).

Heat in motion POLARIS
Portable pan­el infrared heaters can be wall-mount­ed Bsale there are also pan­el infrared heaters with a pow­er of 1- 1.5 kW. Their heat­ing ele­ment is a steel plate with a spe­cial coat­ing. ATan exam­ple is the Clas­sic (EWT) mod­el, which has three modes of oper­a­tion (230, 500 and 1000W), over­heat­ing pro­tec­tion, ther­mo­stat and roller bear­ings. In addi­tion to EWT, infrared heat­ing devices are man­u­fac­tured by HONEYWELL (USA), THERMOBALT (Fin­land), DELONGHI andetc. They cost 1.6–2.90 $.

ToThe fam­i­ly of portable infrared heaters includes inex­pen­sive domes­tic wall-mount­ed heaters based on a spe­cial film that are avail­able on the con­struc­tion mar­kets. Such devices, alas, are not always durable.

The edi­tors would like to thank the super­mar­ket “WORLD OF IDEAL CLIMATE”, the com­pa­ny POLARIS for their help in orga­niz­ing the film­ing.

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