To ensure comfort and convenience in your home, it’s important to select the appropriate water heater for your bathroom. It can be difficult to decide which option best suits your needs because there are so many on the market, including tankless (flowing) heaters, storage (accumulative) heaters, and a variety of sizes and power ratings. We’ll go over the various kinds of water heaters in this guide, along with the important factors to take into account.
Choosing between a storage and tankless water heater is one of the most important choices you’ll have to make. On-demand or instantaneous water heaters, commonly referred to as tankless water heaters, heat water directly without the need of a storage tank. Their endless supply of hot water and energy efficiency are well known. Conversely, as the name implies, storage water heaters hold hot water in a tank until it’s needed. They might only provide a small amount of hot water, but they are frequently less expensive and simpler to install.
It’s important to take the volume and power ratings into account when choosing a water heater. The heater’s power rating indicates how quickly it can heat the water, while the volume describes how much hot water it can hold at once. The number of people in your home and how often you use hot water will determine the appropriate power and volume rating for your bathroom.
When selecting a water heater for your bathroom, there are other crucial factors to take into account in addition to power and volume. These consist of cost, installation and maintenance requirements, and energy efficiency. You can choose a water heater that satisfies your hot water requirements and stays within your budget by carefully weighing each of these factors.
- Types of electric boils for the bathroom
- How to choose a bathroom boiler
- Calculation of the volume of the boiler in the bathroom
- Which company boiler is better for the bath
- Video on the topic
- How to choose a water heater? | Cumulative and flowing water heater – functions and features
- What volume of the water heater is needed for a family of 2 people ?
- Buying a water heater. How to choose a boiler?
- Water heaters for the sink – cumulative 10 and 15 liters
- Choosing a water heater. Engineering plumbing
Types of electric boils for the bathroom
- On the principle of work, sizes:
- capacitive (accumulative) – with a tank for a reserve, storage of water. There are vertical and horizontal boilers;
- running – heat the water during the duct through the heating element. Kinds:
- compact water heaters of wall accommodation;
- nozzles or mounted in mixers;
- pressure (closed) – standard, for centralized water supply;
- Underwear (open)-with the principle of gravity or with low-power pumps, for systems without pressure or with it, but with a cutting reinforcement, the number of fence points is limited due to low power.
Your decision regarding the best bathroom water heater—running or capacious—will be made easier by this comparison:
| Criterion | Accumulative | Protect |
| Dimensions, main features. | There is a reserve with a complete disconnection of water, but they take up more space, it is necessary to wait for heating, the upper boundary of which is higher ( +75 … +85 ° C). | Without storage function, but the user receives warm water immediately after turning on. |
- periodic replacement of the magnesium anode (1 time in 2 years on average);
- Cleaning from scale capacity, wet heating element;
- With then, a laborious drain is required;
- The risk of corrosion of the tank.
- replacement of the anode is not required;
- It is easier to clean and disassemble;
- The drain is not required;
- Dismantling/installation is easier.
For very small bathrooms (niches, dodgers, underwear spaces), horizontal, flat tanks of capacitive water heaters are also appropriate; however, if there is absolutely no space, proto-heating equipment is selected.
A boiler is used to provide a hot bathroom for them to use while they are using the mixer. However, strong pressure can exacerbate heating, so the stability of the water temperature can only reach the level of a high- to medium-intensity stream—not its maximum.
How to choose a bathroom boiler
General suggestions for choosing a bathroom electric boiler:
- More reliable models with dry heating plants (Timberk SWH RWH RE15 100 V), not in contact with water, heating elements are more durable, not subject to corrosion and scale, are replaced without drain;
- auto shutdown during "dry" work, overheating;
- Thermal insulation of the tank (at least 20 – 60 mm like Gorenje OTG 50 Slsim WV9);
- function "anti -fried";
- filters;
- protection:
- blocking self -power after shutdown of power supply;
- from overheating;
- from excess pressure;
- from scale (softeners, calcium destroyer);
- mounted RCD;
Management: While programmable electronic or microprocessor systems with LCD displays, indications (color, sound), smooth power adjustments, temperature controls, and restriction of restriction of restriction are more convenient, mechanics (such as the Electrolux EWH 50 Formax) are more dependable.
Superior accumulative boilers come with:
- An increased magnesium, but better “eternal” anode, which with an almost unlimited term, is not “eaten”, less often requires replacement, and, accordingly, plums;
- thermostat or two heating elements (powerful and weaker like Electrolux Ewh 50 Formax DL);
- functions of the planned VCL./Off.;
- Antibacterial coating.
The inner tank’s material options include stainless steel, plain steel with enamel, biosteclofarfor (Thermex Thermo 50 V Slim), or titanium spraying—which is less common because it is more expensive—at the user’s choice. the benefits and drawbacks of every one separately. Choose tanks with superior welding (like those found in Ariston ABS Pro R 50 V technology Slimmicro Plazma Tig) since corrosion typically shows up at the seams.
The inability to maintain a permanent regime and make adjustments is the primary drawback of low-cost running water heaters. For one or two analysis points, mechanical (hydraulic) control combined with a digital display and indication (Electrolux NPX 6 Aquatronic Digital, Stiebel Eltron DHC 8) is appropriate; however, if additional comfort is required, an electronic system (Clage CEX 9) should be selected.
Features of a top-notch bathroom flow boiler include:
- Corps protection:
- From spray, jets: IPX1 is minimal; Recommended by IPX4, 5 or 6;
- from the penetration of third -party objects: IP2X to IP6x;
- tubular (hets);
- in the form of a section, a block with a spiral from an electrode wire. Ergonomic, cheaper, with better protection against hard water, with a more accurate adjustment.
- Manual: step and unavailable. Preference should be given the last, smooth.
- But the automation is better than the listed: the power is autonomously adjusted to the specified parameters.
STIIEBEL ELTRON DHC 8 installation options example:
Using Profi-Rapid® technology, water heater operation
- A single mounting bar for all devices of the same series.
- The device is installed on an already mounted bar in one movement.
- Convenient tool access.
- Built -in shut -off valve.
- Large and reliable terminals for electrics.
- Perhaps the upper and lower connection of the cable with the simple movement of the terminal block.
- It is possible to install under the sink with the upper placement of controls.
- Removing "insides" without dismantling the case.
- Compensation of wall bumps up to 20 mm.
- The selection of the direction when connecting the highway allows you to place the device where it is convenient for the user.
- The possibility of replacing devices (in t.h. outdated or from other manufacturers) without additional drilling holes in the wall.
Consider the wiring: copper is the material, and for powerful water heaters (like the Timberk SWH RE15 100 V), a section of 2.5 mm² is appropriate. However, there is a chance of burnout or failure. The following are required for devices with higher power (6–8 kW): 4–6 mm² and 4–5 cores (three-phase models).
It is advised to use the line for a single water heater; if multiple devices are connected, you must compare the total power of those devices with the wiring specifications.
Calculation of the volume of the boiler in the bathroom
One of the primary considerations when selecting capacitive types for bathroom water heaters is their volume; another is their flowing performance, or the number of EVN points that can be served per minute by the duct of l/min.
For more precise computations, pre-made average data formulas are available for accumulative boilers. The information is based on relative values. An average family of three requires an 80 or 100 liter water heater for the bathroom. Four people can hear the volume well. When scheduling or storing, take breaks. However, if you take a full bath (collecting water) in addition to a shower, 100 liters might not be sufficient.
Small tanks work well for temporary hot water disconnections for essential uses (dishwashing, showering, and washing clothes):
- 30 liters – 3 people.;
- 20 liters – 2 people.;
- 15 liters – 1 person.
The average data terms show the consumption of typical consumption points. As you can see, for a three-person family, 315 liters will be needed if all the processes are combined, but if they don’t take a bath and heating happens continuously during the consumption/receipt process, 100 liters will actually be sufficient.
| The purpose of the consumption | Comfortable temperature | Average consumption for 1 procedure | The amount of water heated to +60 ° C |
| Washing hands | 38 | 1.5 – 4 | 13 |
| Shower | 37 | 35 – 50 | 17 – 25 |
| Bath | 40 | 150 – 180 | 85 – 120 |
| Washing in the morning | 37 | 12 – 15 | 5 – 8 |
| Washing dishes | 50 | 15 – 25 | 14 – 17 |
| Number of persons | Tank volume, l | |||
| Washing | Shower | Moika+shower | Moika+shower+bath | |
| 1 | 10 | thirty | 50 | 100 |
| 2 | 15 | 50 | 80 | 120 |
| 3 | 20 | 80 | 100 | 150 |
| 4 | thirty | 100 | 120 | 200 |
| 5 – 6 | thirty | 120 | 150 | 300 |
| 7 – 8 | 50 | 150 | 200 | 300 |
The following formula can be used to determine the accumulator’s volume:
Water heater volume: (t2 – t1)= p. water x (t ° – t1)
- water – planned consumption;
- t ° – the temperature that must be obtained;
- T1 – the temperature of the cold input stream;
- t2 – water temperature located in the water heater.
- 4 people.;
- shower, washing, washing dishes.
- Consumption about 7 l/min. (gain water in a container, fix the time);
- Calculation of consumption:
- shower 4 times 10 minutes.: 7 x 10 x 4 = 280;
- Washing dishes 15 minutes., 4 l/min.: 15 x 4 = 60;
- Total 340 l.
- t ° – the desired temperature +35 … +40 ° C. Use +35 ° C;
- T2 – standard capacitive boilers are heated from +35 to +80 ° C, usually exposed +55 … +65 ° C. Take +65 ° C;
- T1 – cold input stream +10 ° C.
A large electric storage boiler (120–150 liters or more) should be used to heat (set) the water for the bath. The procedure is the most expensive, particularly if additional consumption is involved (shower, wash, wash). Occasionally, once or twice a week, if there are pauses or diluting with cold water to take a 120-liter bath, it is assumed that the bowl (170–200 liters) is not entirely filled. If you restrict yourself to just three people getting a quick or lengthy shower. Sufficient 100 or 80 liters.
Easily navigate to select the family’s boiler volume. Tables will be useful.
Consider the power to heating time ratio when making your selection:
Table for calculating how long it will take for water in a storage water heater to heat up based on tank capacity, heater power, and heating temperature
An 8 kW flow (good for a shower) or a capacitive model made for a bowl’s capacity is the perfect water heater for a bath. Using a 100-liter tank, you can fill the bathtub up to three times for showering. 120 l is usually sufficient for a bath wash plus a little additional use, but three people will need more for maximum comfort. ideally 150–200 liters, assuming that this process is frequently approved. Water heaters that are capable of rapidly heating up to 3 kW or more should be powerful.
Without a tank, small-scale electric engineers compute the missile’s performance—heating it in liters per minute using the heater segment—and determine how many fence points can support the device. The power has a direct bearing on the parameter.
The flow water heater’s performance formula, or the liters of water heated per minute, is as follows:
- P – power, W;
- C – specific heat capacity (constant) of water 1.163;
- Δϑ – the difference between the temperature at the input and output.
Three variables are used in the formula. An illustration of a calculation
A shower will require, on average, 4 l/min.A room-sized shower will require 1.5 l/min.
Determine which duct is required to heat a space to a specific temperature:
The way in which water heaters operate
| Water temperature at the input | 3 kW | 6 kW | 8 kW | 12 kW | 15 kW | 18 kW | 21 kW | 24 kW | 27 kW |
| 6 ° C | 1.3 | 2.7 | 3.6 | 5.4 | 6.7 | 8.2 | 9.4 | 10.7 | 12.0 |
| 10 ° C | 1.5 | 3.0 | 4.1 | 6.1 | 7.7 | 9.2 | 10.7 | 12.3 | 13.8 |
| 14 ° C | 1.8 | 3.6 | 4.8 | 7.2 | 9.0 | 10.7 | 12.7 | 14.3 | 16.1 |
| 18 ° C | 2.1 | 4.3 | 5.7 | 8.6 | 10.7 | 12.9 | 15.0 | 17.3 | 19.3 |
| The data is indicated at the water temperature at the output of +38 ° C, liters/ per minute | |||||||||
| Water temperature at the input | 3 kW | 6 kW | 8 kW | 12 kW | 15 kW | 18 kW | 21 kW | 24 kW | 27 kW |
| 6 ° C | – | – | 2.3 | 3.5 | 4.4 | 5.2 | 6.1 | 7.0 | 7.9 |
| 10 ° C | – | – | 2.5 | 3.8 | 4.8 | 5.7 | 6.7 | 7.6 | 8.6 |
| 14 ° C | – | – | 2.8 | 4.1 | 5.2 | 6.3 | 7.3 | 8.4 | 9.4 |
| 18 ° C | – | 2.3 | 3.1 | 4.8 | 5.7 | 6.9 | 8.1 | 9.2 | 10.3 |
| At water temperature at the output +55 ° C, liters/per minute | |||||||||
| The performance of a running water heater for heating cold (+15) water in the summer, depending on its power, l/min. | |||||||||
| Water temperature at the output, ° C | power, kWt | ||||||||
| 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 15 | |
| thirty | 2.7 | 3.7 | 4.6 | 5.5 | 6.4 | 7.3 | 9.1 | eleven | 13.7 |
| 40 | 1.6 | 2.2 | 2.7 | 3.3 | 3.8 | 4.4 | 5.5 | 6.6 | 8.2 |
| 50 | 1.2 | 1.6 | 2 | 2.3 | 2.7 | 3.1 | 3.9 | 4.7 | 5.9 |
| The performance of a running water heater for heating cold (+5) water in winter, depending on its power, l/min. | |||||||||
| Water temperature at the output, ° C | power, kWt | ||||||||
| 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 15 | |
| thirty | 1.6 | 2.2 | 2.7 | 3.3 | 3.8 | 4.4 | 5.5 | 6.6 | 8.2 |
| 40 | 1.2 | 1.6 | 2 | 2.3 | 2.7 | 3.1 | 3.9 | 4.7 | 5.9 |
| 50 | 0.9 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3 | 3.7 | 4.6 |
Which company boiler is better for the bath
Reputable water heaters should be given priority:
- Electrolux, Gorenje, Ariston – market leaders, all price categories, wide range;
- Hyundai (South Korea) – good quality, the range is not too extensive;
- Timberk (Sweden) – a brand of climatic technology. Judging by the reviews, there are questions to quality, not cheap (typical Timberk Whe 6 sample.5 xtn z1);
- Thermex (Italy) – an acceptable ratio of quality and price, leading sales positions;
- Additionally, 3 companies are allocated by running water heaters:
- Stiebel Eltron, Clage – high -quality products, technology from simple to the most difficult, respectively, wide price assortment for any requests;
- Evan is a reliable domestic product, despite a simple design and limited assortment. Adaptability to domestic conditions, practicality, maintainability. Some models are quite overall, good performance (Evan B1-9).
| Selection Criteria | Best Water Heater Type |
| Volume | Accumulative |
| Power | Flowing |
| Space | Flowing |
| Usage Frequency | Accumulative |
Selecting the ideal water heater for your bathroom is essential for your convenience and comfort. Water heaters come in a variety of designs, such as tankless, flow-through, and storage models. Every kind has benefits and drawbacks, so before choosing one, it’s critical to take your unique requirements into account.
Instantaneous or tankless water heaters, commonly referred to as flow-through water heaters, heat water as it passes through the device as needed. They are a great option for homes with high hot water demands since they are energy-efficient and consistently deliver hot water. However, their installation costs can be higher than those of other types of heaters, and they might not be appropriate for homes with low water pressure.
Tank heaters, another name for storage water heaters, are devices that hold hot water in an insulated tank until it’s needed. They work well in homes with low water pressure and are reasonably cheap to buy and install. But because they heat water constantly, even when it’s not being used, they may be less energy-efficient than tankless heaters.
Take the unit’s size and power into consideration when selecting a water heater for your bathroom. The number of people living in your home and how often you use hot water will determine the size of the water heater. To guarantee a sufficient supply of hot water, a larger household will need a larger water heater. Similar to this, the water heater’s power will dictate how quickly and how much hot water it can produce at once.
When choosing a water heater, energy efficiency, upkeep needs, and installation expenses are all crucial considerations. Your utility costs can be reduced by energy-efficient water heaters, and low-maintenance models will require less care over time. To make sure that the plumbing and electrical systems in your house are compatible with the type of water heater you choose, don’t forget to take into account the installation requirements of each model.
There are a number of things to take into account when selecting a water heater for your bathroom to make sure you make the best decision. Important factors to consider are power, volume, accumulative, and flowing. While accumulative water heaters store hot water for later use, flowing water heaters deliver hot water instantly. How much hot water the water heater can produce and how quickly it can heat it depend on its volume and power. The need for maintenance, space requirements, and energy efficiency are additional crucial factors. You can choose the ideal water heater for your bathroom that suits your needs and tastes by taking these things into account.
