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When it comes to autonomous water heat­ing sys­tems, for many, espe­cial­ly old­er peo­ple, the image of gas water heaters from old Sovi­et films comes to mind. They, as a rule, had an unsight­ly appear­ance, took up a lot of space and often failed. But now the mar­ket is sat­u­rat­ed with boil­ers of many mod­i­fi­ca­tions from var­i­ous price cat­e­gories. You can find from almost desk­top (or under-sink) options for heat­ing water for wash­ing dish­es to large 500-liter capac­i­tive ones that pro­vide com­fort­able bathing for the whole fam­i­ly. You can choose the right boil­er for almost any liv­ing con­di­tions.

Boil­ers are devices for heat­ing water and keep­ing the tem­per­a­ture at a giv­en val­ue. They are divid­ed into com­pact flow and accu­mu­la­tive with a water tank. Based on the name of the units, the first of them are installed direct­ly into the water sup­ply sys­tem and do not have a stor­age tank, and the heat­ing ele­ments are locat­ed direct­ly in the flow of pass­ing water. The design of the lat­ter, on the con­trary, pro­vides for the pres­ence of a tank of a cer­tain capac­i­ty (from 5 liters and above), where the water is heat­ed. In addi­tion, they have dif­fer­ent heat­ing meth­ods:

direct heat­ing	Water heat­ing is car­ried out with the help of heat­ing ele­ments installed direct­ly in the liq­uid vol­ume. Or a gas burn­er through a com­bus­tion cham­ber through which a pipe with heat­ed water pass­es;
indi­rect heat­ing	Water heat­ing occurs indi­rect­ly with the help of an inter­me­di­ate heat car­ri­er, which trans­fers heat from a heat­ing source (locat­ed out­side the water sup­ply sys­tem) to water;
Com­bined heat­ing	Both meth­ods of heat­ing are present here. This option is used to heat a large vol­ume of water (from 50 liters and above). A coil with a hot coolant pass­es through the tank, and addi­tion­al heat­ing ele­ments are installed in it.

Mod­els of water heaters with sev­er­al points of water intake are also pro­duced. This term defines the loca­tion of the water sup­ply sys­tem from which hot water is sup­plied direct­ly to the con­sumer. It can be a faucet in the kitchen, in the bath­room or con­nect­ing a show­er and a wash­ing machine. In oth­er words, this is the part of the sys­tem from which hot water is poured.

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And, of course, mod­ern boil­ers are equipped with reli­able means of pro­tec­tion:

• from over­heat­ing;
• from excess pres­sure;
• from cor­ro­sion;
• from emer­gency acti­va­tion.

All direct fired boil­ers are fit­ted with mag­ne­sium anodes to pro­tect the body from rust. A manda­to­ry attribute of the water heater are also safe­ty valves and tem­per­a­ture sen­sors. The most advanced mod­els are con­nect­ed to a Wi-Fi mod­ule and con­trolled by a smart­phone from any­where in the world.

By type of heat­ing ele­ment There are gas and elec­tric boil­ers. The for­mer heat the same vol­ume of water faster, but they cost more. Yes, and the fuel con­sump­tion in the end can cost more than the con­sump­tion of elec­tric­i­ty used in the sec­ond type of water heaters (espe­cial­ly if the heater is forced to work for a long time). The large vol­ume of stor­age capac­i­ty (from 50 l) increas­es the effi­cien­cy of gas units. Also, when choos­ing, one should take into account the pres­ence of a gas pipeline, the pow­er of elec­tric pow­er lines and the cost of instal­la­tion.

There­fore, more and more often, for the needs of every­day life in an apart­ment or in a sep­a­rate house, res­i­dents install boil­ers for heat­ing water. This trend is due to sev­er­al rea­sons:

• The pres­ence of such units makes it pos­si­ble to reduce the cost of hot water sup­ply and heat­ing with a com­pa­ra­ble tol­er­a­ble increase in elec­tric­i­ty fees (in the case of elec­tric boil­ers);
• A per­son liv­ing in a sep­a­rate house can set the time for sea­son­al switch­ing on and off of the bat­ter­ies him­self if he has pur­chased a water heater that can be con­nect­ed to the heat­ing sys­tem;
• There is no need to live for some time in the sum­mer with­out hot water, which is turned off for main­te­nance work;
• It becomes pos­si­ble to reg­u­late the tem­per­a­ture of hot water, oper­at­ing the boil­er in an eco­nom­i­cal or inten­sive mode.

Editor’s Choice

Electrolux EWH 50 Centurio IQ 2.0 (cumulative)

An excel­lent exam­ple of water heat­ing units with a pow­er of 2 kW with sev­er­al points of water intake has a styl­ish appear­ance and com­pact dimen­sions. The device is con­trolled by elec­tron­ics, which includes a Wi-Fi mod­ule. This allows you to set the oper­at­ing modes of the water heater remote­ly through a pro­pri­etary appli­ca­tion on your smart­phone (Home Com­fort). In addi­tion, the pres­ence of a delayed start timer (up to 24 hours) allows you to pro­gram the heat­ing to turn on at a con­ve­nient time for the con­sumer, and this saves ener­gy costs. Due to good ther­mal insu­la­tion, water heat­ed from 20 ° C to a tem­per­a­ture of 75 ° C does not cool for a long time in 114 min­utes.

The abil­i­ty to install in a ver­ti­cal and hor­i­zon­tal posi­tion allows you to place it almost any­where in an apart­ment or house. With an aver­age water con­sump­tion (up to 25 liters), a 50-liter thin-walled stain­less steel tank capac­i­ty is enough to pro­vide two users with hot water. The mag­ne­sium anode gives addi­tion­al pro­tec­tion to the tank against rust for­ma­tion.

The durable oper­a­tion of the device is facil­i­tat­ed by the design of X‑HEAT heat­ing ele­ments, made using a unique dry-type tech­nol­o­gy. The heat­ing ele­ments are placed in a spe­cial flask and do not come into con­tact with water, which pre­vents the for­ma­tion of salt deposits and scale. A reli­able pro­tec­tion sys­tem equipped with a safe­ty valve pre­vents the device from start­ing with­out water and turns it off in case of over­heat­ing.

The automa­tion sys­tem also has an inte­grat­ed frost pro­tec­tion mode (auto­mat­ic heat­ing is acti­vat­ed when the water tem­per­a­ture reach­es below +6 °C). On the case of the unit there is an indi­ca­tion of inclu­sion and tem­per­a­ture. The boil­er is pow­ered by a 220 V net­work. Accord­ing to cus­tomer reviews, the boil­er has thin walls that can leak and unre­li­able insu­la­tion of heat­ing ele­ments.

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Main characteristics

Pros and cons

Rating of the top 4 best inexpensive boilers for heating water

1. Zanussi 3‑logic 5.5 TS (flow-through)

3‑logic series water heater designed to oper­ate with one draw-off point (sin­gle hot water out­let). The device is suit­able for use when there is no hot water in the house or apart­ment at all. The com­pact mod­el with­out a stor­age tank can be installed any­where, regard­less of the area of ​​the room.

Instal­la­tion of the device will be done even by an ama­teur — it will take quite a bit of effort and time. The device is installed on the wall in a hor­i­zon­tal posi­tion with a low­er water sup­ply. The 5.5 kW unit has 3 pow­er lev­els, pro­vid­ing the choice of the most eco­nom­i­cal mode of oper­a­tion, depend­ing on the needs of the con­sumer at a par­tic­u­lar point in time.

A high-per­for­mance water heater pro­duces up to 3.7 liters of run­ning water heat­ed to 40 ° C per minute at the out­let (not a very high degree of heat­ing, if the water tem­per­a­ture is clos­er to 0 ° C, then its tem­per­a­ture may be low­er). The mechan­i­cal con­trol of the cop­per heat­ing ele­ments has an on indi­ca­tion and three oper­at­ing modes.

The sys­tem also has a built-in fil­ter for water purifi­ca­tion. The device has a pro­tec­tion mech­a­nism con­sist­ing of over­heat­ing and flow sen­sors (detects the pres­ence of water in the pipe). It will not turn on with­out water and will turn off when the tem­per­a­ture exceeds the set norm. Also, the device is equipped with a 30 A elec­tri­cal pro­tec­tion cir­cuit break­er. Pow­er is sup­plied from a house­hold net­work with a volt­age of 220 V. The kit includes a faucet and a show­er head, but there is no net­work cable and plug.

Main characteristics

Pros and cons

Water heaters for an apart­ment

Com­pact appli­ances with min­i­mal water heat­ing time for small spaces

2. Atmor Basic 3.5 (flow through)

Solves the prob­lem of turn­ing off hot water for a short peri­od in the sum­mer in a city apart­ment, where the water pres­sure is sta­ble. This inex­pen­sive 3.5 kW boil­er sup­plies one point. The small-sized (with­out stor­age capac­i­ty) device can be eas­i­ly installed on the wall in a hor­i­zon­tal posi­tion. Then it remains only to con­nect the usu­al short show­er hose from below (includ­ed in the kit), and you will be pro­vid­ed with hot water heat­ed to a max­i­mum tem­per­a­ture of 50 ° C.

The water heater is con­trolled mechan­i­cal­ly. Tem­per­a­ture and turn-on read­ings are dis­played on the pan­el. The tubu­lar type cop­per heat­ing ele­ment pro­vides hot water flow up to 2 liters per minute. The boil­er has a stan­dard sys­tem of pro­tec­tion against over­heat­ing and from start­ing with­out water. The device is con­nect­ed to a stan­dard elec­tri­cal out­let with a volt­age of 220 V. Among the short­com­ings are a short hose (0.6 m) and low water tem­per­a­ture at high flow rates (25–30 ° C).

Main characteristics

Pros and cons

3. Electrolux EWH 30 Quantum Pro (cumulative)

The vol­ume of a 30-liter tank at an aver­age flow rate (up to 25 liters) ensures the con­sump­tion of hot water in an eco­nom­i­cal mode with access to sev­er­al out­lets (it is pos­si­ble to con­nect two or more con­sumers). A device with a pow­er of 1.5 kW heats water from 20 ° C to a tem­per­a­ture of 75 ° C in 95 min­utes. The water tem­per­a­ture remains warm (up to 30 °C) for 8 hours. The design of this boil­er, thanks to the com­pact size (up to 34 cm in diam­e­ter) of the stor­age tank, allows you to install it even in a lim­it­ed space (only an area of ​​​​about 4 m²). The water heater is eas­i­ly hung on the wall in a ver­ti­cal posi­tion, how­ev­er, the mount­ing sys­tem is not quite well thought out (there are no fas­ten­ers in the kit).

The Pro­tect Tank design pro­vides mul­ti-lev­el cor­ro­sion pro­tec­tion for all key com­po­nents of the water heater. First­ly, it is a high-qual­i­ty coat­ing with fine­ly dis­persed enam­el of the sur­faces inside the tank. Sec­ond­ly, the pres­ence of a mas­sive mag­ne­sium anode. Pro­tec­tion dur­ing oper­a­tion is pro­vid­ed by spe­cial sen­sors — they pro­tect the boil­er from over­heat­ing, from start­ing with­out water, and also from exceed­ing the hydraulic pres­sure of the water pres­sure.

Mechan­i­cal con­trol makes the unit easy to oper­ate. The read­ings of the built-in ther­mome­ter are dis­played on the pan­el, where there is a device for indi­cat­ing the cur­rent and set tem­per­a­ture. The unit is equipped with an addi­tion­al func­tion of water dis­in­fec­tion using a built-in fil­ter. The boil­er is pow­ered by a house­hold net­work of 220 V. The con­nec­tion is made with a stan­dard sock­et. Accord­ing to cus­tomer reviews, the fas­ten­ing of the hot water intake pipe is unre­li­able.

Main characteristics

Pros and cons

4. Zanussi GWH 10 Fonte Glass La Spezia (flow-through)

A rep­re­sen­ta­tive of the flow type in our top. Despite the con­tro­ver­sy, such water heaters can also be clas­si­fied as boil­ers. This gas water heater pri­mar­i­ly cap­ti­vates with its unusu­al design and com­pact dimen­sions.

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If we talk about tech­ni­cal advan­tages, then this device with a capac­i­ty of up to 10 l / min is dis­tin­guished by its safe­ty. Man­u­fac­tur­ers equipped the unit with over­heat­ing pro­tec­tion, as well as lim­it­ing the heat­ing tem­per­a­ture, depend­ing on the spec­i­fied para­me­ters. In addi­tion, a con­ve­nient elec­tron­ic dis­play and the pres­ence of elec­tric igni­tion from bat­ter­ies can please, which elim­i­nates the need to con­nect to the mains.

Main characteristics

Pros and cons

Rating of the top 3 best boilers for heating water in an apartment

1. Edisson ES 30 V (cumulative)

The boil­er has a pow­er of 1.5 kW, which pro­vides heat­ing of water in a 30-liter tank to a tem­per­a­ture of 70 ° C in just 65 min­utes. The heat­ing tem­per­a­ture is dis­played on the elec­tron­ic indi­ca­tor locat­ed on the front side of the pan­el. The unit has sev­er­al points of water intake, and the mechan­i­cal con­trol sys­tem is extreme­ly easy to oper­ate. The water heater is mount­ed on the wall in a ver­ti­cal posi­tion. It has a com­pact size and can be freely installed in the bath­room.

Water is heat­ed by cop­per tubu­lar anodes, pro­vid­ed with 4 degrees of pro­tec­tion against the effects of the heat­ed liq­uid. There is an eco­nom­i­cal mode of oper­a­tion. Pow­er is sup­plied from the 220 V net­work through a stan­dard plug (which does not have an RCD on the wire).

The device has a rein­forced glass-ceram­ic insu­lat­ing coat­ing inside the stor­age tank, which per­fect­ly pro­tects it from cor­ro­sion. In addi­tion, the boil­er is equipped with a mag­ne­sium anode, which gives an addi­tion­al guar­an­tee against plaque (it neu­tral­izes the salts in the water). So the tank body remains clean through­out the entire peri­od of oper­a­tion.

The safe­ty sys­tem is equipped with check and safe­ty valves that pro­tect the machine from over­heat­ing and dry start. The con­sumer will need to make efforts to mount the device, since the exist­ing fas­ten­ers are unre­li­able.

Main characteristics

Pros and cons

2. Zanussi ZWH/S 30 Orfeus DH (cumulative)

A water heater with a tank of small vol­ume (30 liters) is ide­al for instal­la­tion in the bath­room of a small apart­ment (from 18 to 20 m²). It is mount­ed ver­ti­cal­ly on the wall, water is sup­plied from below, and the device itself is designed for sev­er­al points of hot water analy­sis. The pow­er con­sump­tion of 1.6 kW is enough to heat the water in the stor­age tank to a tem­per­a­ture of 75 ° C in 100 min­utes. The tubu­lar heater is placed in an insu­lat­ed flask, which pre­vents it from becom­ing cov­ered with limescale and rust.

The enam­eled tank has addi­tion­al pro­tec­tion against cor­ro­sion in the form of a mag­ne­sium anode installed in it. Pro­tec­tion against over­heat­ing, over­pres­sure and dry start is pro­vid­ed by a reli­able automa­tion sys­tem. The mechan­i­cal con­trol method is also con­ve­nient. The reg­u­la­tor on the front pan­el can set var­i­ous oper­at­ing modes (3, includ­ing eco­nom­i­cal). How­ev­er, there is no dis­play and dig­i­tal tem­per­a­ture dis­play. The con­nec­tion is made to a stan­dard 220 V sock­et.

Main characteristics

Pros and cons

3. Thermex Hit 10 U (Pro) (cumulative)

The func­tion­al boil­er is made in a mod­ern design, com­pact and easy to use. The device is equipped with a stain­less steel tank that can hold up to 10 liters of liq­uid (this vol­ume is not enough for a fam­i­ly of two or more). The unit has a con­sumed and use­ful pow­er of 1.5 kW. It is enough to heat the avail­able vol­ume of water to 45 °C (oper­at­ing tem­per­a­ture) in just 21 min­utes. The max­i­mum water tem­per­a­ture is 75°C.

It is note­wor­thy that the inner sur­faces of the stor­age tank are cov­ered with a thick lay­er of glass ceram­ics. The mag­ne­sium anode is guar­an­teed to pro­vide addi­tion­al pro­tec­tion against rust, and the heat­ing ele­ment is made of stain­less steel. An eco­nom­i­cal mode is pro­vid­ed, oper­at­ing in which it con­sumes an aver­age of 219 kWh per year. The water heater is equipped with a safe­ty valve that pre­vents over­heat­ing. It oper­ates from a 220 V net­work, it is con­nect­ed with a stan­dard plug (there is no RCD on its wire).

Main characteristics

Pros and cons

Rating of the top 6 best boilers for heating water in a private house

1. Electrolux EWH 100 Formax (cumulative)

A com­pact size boil­er can be safe­ly installed in homes with almost any net­work wiring. The unit is designed for a pow­er of 2 kW. This pro­vides heat­ing of 100 liters of liq­uid to a tem­per­a­ture of 75 ° C for 240 min­utes in an accel­er­at­ed mode. This amount of water is more than enough for 1 per­son to take a show­er, although it is pos­si­ble to con­nect sev­er­al water out­lets (show­er, kitchen faucet, wash­ing machine). It is con­ve­nient to use the eco-mode — when it is turned on, the water heats up to 55 degrees, sav­ing ener­gy con­sump­tion.

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The dura­bil­i­ty of the water heater is ensured by a fine­ly dis­persed enam­el coat­ing of the tank along with the oper­a­tion of an enlarged mag­ne­sium anode (com­pared to con­ven­tion­al sam­ples). Pro­tec­tion against scale and deposits is car­ried out by the dry tech­nol­o­gy of installing heat­ing ele­ments, when they are iso­lat­ed from con­tact with the aque­ous medi­um by a spe­cial flask (Pro­tect Tank).

The con­trol of the mechan­i­cal reg­u­la­tor on the front pan­el implies 3 pow­er modes with­out tem­per­a­ture indi­ca­tion. Oper­a­tional safe­ty is guar­an­teed by mul­ti-lev­el pro­tec­tion — it includes an emer­gency shut­down device, over­heat­ing and over­pres­sure safe­ty valves. Accord­ing to cus­tomer reviews, the fas­ten­ers are of poor qual­i­ty and require replace­ment.

Main characteristics

Pros and cons

2. Thermex ER 290 V (accumulative)

This 200-liter mas­sive (60 kg) boil­er will pro­vide com­fort to the home, in which it is eas­i­ly installed, as it has a water con­nec­tion on the side. With an aver­age con­sump­tion (up to 25 l), the amount of hot water is enough for 4 con­sumers. Con­sumed (use­ful) pow­er of 6 kW gen­er­ates heat­ed water with a max­i­mum tem­per­a­ture of 70 ° C in 4 hours. How­ev­er, the boil­er has an eco-mode, which cre­ates water that is opti­mal for domes­tic needs at 45 ° C.

The entire vol­ume is heat­ed from a tem­per­a­ture of about 20 ° C to a work­ing tem­per­a­ture in just 2 hours. The enam­eled stain­less steel of the stor­age tank reli­ably pro­tects the tank from cor­ro­sion. The unit is equipped with a mechan­i­cal con­trol sys­tem that pro­vides oper­a­tion in three pow­er modes: 2, 4 and 6 kW. There is a styl­ish reg­u­la­tor on the front pan­el. The heat­ing ele­ment is made using Tita­ni­um Heat tech­nol­o­gy (from tita­ni­um), how­ev­er, the con­tacts are made of ordi­nary steel, which quick­ly rusts and starts to leak (accord­ing to cus­tomer reviews).

Main characteristics

Pros and cons

3. Ariston SGA 150

A boil­er with a stor­age capac­i­ty of 155 liters sup­plies con­sumers with hot water up to 75 ° C, regard­less of its one-time flow and pres­sure. An open com­bus­tion cham­ber with nat­ur­al draft (with­out a damper on the chim­ney) pro­vides a use­ful pow­er of the device a lit­tle more than 7 kW. The boil­er works reli­ably at a reduced pres­sure of blue fuel, and the struc­ture of the burn­er allows you to con­nect liq­ue­fied gas.

The water heater tank with a drain hole is made of high-qual­i­ty steel cov­ered with a thick lay­er of enam­el. This ensures a long ser­vice life with­out rust for­ma­tion. The pres­ence of a mag­ne­sium anode also con­tributes to reli­able pro­tec­tion. The pan­el con­tains a mode selec­tion knob (7) and a piezo igni­tion but­ton (auto­mat­i­cal­ly ignites the col­umn at the right time), but there is no ther­mome­ter.

Main characteristics

Pros and cons

4. Drazice OKC 200 NTRR (cumulative)

The vol­ume of the tank of this mod­el is 200 liters, which will pro­vide even a large house with hot water, not to men­tion a two-three-room apart­ment.

Two heat exchang­ers with a total capac­i­ty of 48 kW will ensure fast and high-qual­i­ty heat­ing. After 5 min­utes of oper­a­tion, you will notice that the water will become warmer. In total, the max­i­mum pos­si­ble tem­per­a­ture that this boil­er will pro­vide is 90 degrees.

The device is equipped with numer­ous safe­ty sys­tems, includ­ing pro­tec­tion against over­heat­ing and over­pres­sure. It is also worth not­ing a nice bonus in the form of the abil­i­ty to com­bine the sup­ply of hot water from the boil­er and anoth­er source of ther­mal ener­gy.

Among the short­com­ings, one can sin­gle out only the dimen­sions of the device (which is not sur­pris­ing, giv­en the vol­ume of the tank) and the total weight — it is 108 kg.

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Main characteristics

Pros and cons

Water heaters for sum­mer cot­tages

An excel­lent solu­tion to the prob­lem of lack of hot water in a coun­try house

5. Electrolux EWH 100 Centurio IQ 2.0 (cumulative)

The pow­er of this elec­tric stor­age water heater allows you to heat water with a vol­ume of 100 liters (such is the capac­i­ty of the tank) up to 75 degrees. Of the main advan­tages, it is worth high­light­ing pro­tec­tion against over­heat­ing, freez­ing and elec­tric shock; safe­ty valve; mag­ne­sium anode; dry heater.

A dis­tinc­tive fea­ture of this unit is elec­tron­ic con­trol with a remov­able Smart Wi-Fi mod­ule. This func­tion allows you to con­trol the machine with a ded­i­cat­ed appli­ca­tion installed on your smart­phone. So you can remote­ly con­trol the oper­a­tion of the water heater, set the timer and acti­vate the delayed start option. A small weight of 24 kg will allow you to install this boil­er with­out invit­ing spe­cial­ists.

Per­haps the only draw­back is the build qual­i­ty — there are often mod­els that are not made very reli­ably. There­fore, before buy­ing, you should care­ful­ly inspect the prod­uct.

Main characteristics

Pros and cons

6. Thermex Combi ER 100V (cumulative)

This boil­er dif­fers from ana­logues in small dimen­sions and a weight of “only” 46.4 kg. This device com­bines indi­rect and elec­tric heat­ing meth­ods, which are pro­vid­ed by a heat exchang­er and a tubu­lar elec­tric heater, respec­tive­ly.

Also of the plus­es, it is worth point­ing out that the pre-installed mag­ne­sium anode, which pro­tects the insides from cor­ro­sion, is not sin­gle, but dou­ble, unlike the vast major­i­ty of ana­logues. A pleas­ant dif­fer­ence from com­peti­tors is the rel­a­tive­ly low cost.

Main characteristics

Pros and cons

Leaders of the Past

1. Protherm FE 200/6 BM (cumulative)

This device is equipped with a capa­cious tank, the vol­ume of which is 184 liters. Stain­less steel heat exchang­er allows you to heat water up to a max­i­mum tem­per­a­ture of 80 degrees. In case of over­heat­ing, a pro­tec­tion sys­tem is acti­vat­ed that turns off the device. At the same time, the case is equipped with a ther­mo­stat, where you can set your max­i­mum tem­per­a­ture, above which the water will not heat up.

The mod­el has a con­ve­nient mechan­i­cal con­trol sys­tem, thanks to which the water heater is quick and easy to set up. The only draw­back (like all water heaters with a large tank) is the large dimen­sions of the device and the weight of 97 kg.

Pros and cons

2. Baxi SAG3 80 (cumulative)

Anoth­er com­pact mod­el in our rat­ing. Due to its small dimen­sions and weight of 34 kg, this boil­er is suit­able for instal­la­tion both in an indi­vid­ual house and in an apart­ment. The tank vol­ume of 80 liters is enough for a mod­er­ate water con­sump­tion by a fam­i­ly of 2–3 peo­ple. Resis­tant enam­el, which is cov­ered with a tank, will pro­tect the device from cor­ro­sion, which will increase its ser­vice life.

The burn­er of this appa­ra­tus is equipped with a gas con­trol sys­tem, the design itself pro­vides for an exhaust valve that removes excess pres­sure from the tank. Tem­per­a­ture con­trol is mechan­i­cal. Anoth­er plus is the abil­i­ty to work on liq­ue­fied gas from a cylin­der.

Pros and cons

How to choose a water heater

When choos­ing a water heater, it is rec­om­mend­ed to pay atten­tion to the fol­low­ing cri­te­ria:

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Boiler volume

It is select­ed depend­ing on the con­sump­tion of hot water for house­hold needs and (or) heat­ing. Small water heaters (10, 15, 30 liters) are main­ly installed in the kitchen. Medi­um-capac­i­ty units (50, 80, 100 liters) are suit­able for dai­ly use by a fam­i­ly of 2–3 peo­ple. Large capac­i­ty boil­ers (200, 300, 500 and above) are designed for large fam­i­lies.

Storage system type

Flow boil­ers are much cheap­er, more com­pact and more eco­nom­i­cal than stor­age boil­ers. How­ev­er, they have their own sig­nif­i­cant draw­back: the rapid cool­ing of water when the unit is turned off. Also, the water tem­per­a­ture may turn out to be low at an increased flow rate (more than 25 l). There­fore, for large fam­i­lies, it is prefer­able to choose the option with a stor­age tank. In addi­tion, in order to quick­ly heat up a suf­fi­cient vol­ume of water, a flow-through boil­er of high pow­er is required — from 3 to 27 kW. While for stor­age heaters, from 1 to 3.5 kW is enough.

Water heating time

This para­me­ter becomes impor­tant when choos­ing a boil­er, if there are a large num­ber of poten­tial con­sumers with a rel­a­tive­ly small tank capac­i­ty. The heat­ing time depends on the pow­er of the heat­ing sys­tem, on the vol­ume of liq­uid that needs to be made hot and on the type of water heater, since gas heaters spend less time heat­ing than elec­tric ones.

Heating element location

There are two options: indoor or out­door. In the first case, this is an elec­tric heat­ing ele­ment. It is placed inside a heat­ed envi­ron­ment. In the sec­ond vari­ant, the heat­ing ele­ment is equipped in gas boil­ers or fur­nace fur­naces, that is, out­side the heat­ed liq­uid. The choice of a par­tic­u­lar type is influ­enced by many fac­tors, for exam­ple, the fre­quen­cy of use (with rare use, heat­ing ele­ments are bet­ter), the cost of fuel, its avail­abil­i­ty (for exam­ple, gasi­fi­ca­tion with nat­ur­al gas), vol­ume and oth­er fac­tors.

Type of protection of the water heater tank against corrosion

The exe­cu­tion of the stain­less steel tank of the boil­er will reli­ably pro­tect it from cor­ro­sion, but over time it can still form at the joints of the seams. There­fore, some water heaters pro­vide for the instal­la­tion of a mag­ne­sium anode. It neu­tral­izes the aggres­sive­ness of the aquat­ic envi­ron­ment and pro­vides long-term anti-cor­ro­sion pro­tec­tion. In the end, a well-made tank made of ordi­nary steel, but enam­eled on the inside, costs less and will last a long time (of course, if there are no chips on the sur­face).

Installation fastening design

It is select­ed based on the planned instal­la­tion loca­tion in the house or apart­ment. They can be wall or floor, hor­i­zon­tal or ver­ti­cal. Boil­ers of large vol­umes, as a rule, are made in a ver­ti­cal floor ver­sion. Small­er hor­i­zon­tal units can be con­ve­nient­ly and dis­creet­ly placed in sep­a­rate nich­es or hid­den in spe­cial draw­ers. It should be borne in mind that in hor­i­zon­tal struc­tures, due to the lat­er­al arrange­ment of heat­ing ele­ments, the heat­ing effi­cien­cy will be low­er than in ver­ti­cal struc­tures of the same capac­i­ty.

Expert review of boilers for heating water

Chair­man of the Expert Coun­cil of the Eurasian Heat­ing Sys­tems Mar­ket Asso­ci­a­tion Alexan­der Maslov shared his per­son­al expe­ri­ence of using a boil­er for heat­ing water:

“I believe that the choice of boil­ers for heat­ing water is the best solu­tion for sup­ply­ing a pri­vate house or apart­ment with hot water. Based on my rich expe­ri­ence with such units, I came to the con­clu­sion that for each spe­cif­ic case, you can choose an effi­cient, eco­nom­i­cal and reli­able water heater due to the large num­ber of devices on the mar­ket. I advise you to choose devices of pop­u­lar man­u­fac­tur­ers that have already proven them­selves. Pay atten­tion to the qual­i­ty of com­po­nents and the pres­ence of addi­tion­al func­tions (dis­play, pre­cise tem­per­a­ture con­trol, con­nec­tion to the smart home sys­tem).”

Popular questions and answers

Answers to pop­u­lar ques­tions about the oper­a­tion of boil­ers Alexan­der Maslov, Chair­man of the Expert Coun­cil of the Eurasian Heat­ing Sys­tems Mar­ket Asso­ci­a­tion (EURAROS).

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