How to choose an electric instantaneous water heater - Features and Tips

hot water problem is solved in different ways.In some cases it is more expedient to simplify the task and use that type of flow-through water heaters.Their main advantages - compact size (hence lower cost compared to peers) and speed.But which model is better to buy - this question requires detailed consideration.

Selection Criteria

The range of instruments is so huge, that the purchase of such email / heater causes certain difficulties.Not only advertising, but also sellers lead many arguments in favor of this or that choice.Only here where is the guarantee that "it is" vitally important to us and meet our needs completely?Whether outlets experts know where we live, how to arrange our life, especially the water supply system, and more?And if so, what is more important to them - our well-being or sales?Question is not rhetorical.

Any acquisition must be deliberate and justified.To buy the best option of the heater and do not pay, you need to know some basic rules and everything else - the shape, design and the like - it is on the buyer's discretion as to the operation of the heater such options have no effect.

Pressure model

Pros

• hot water, with appropriate "layout" highway, can be prepared in any room.Number of connected points depends on the design features of the water heater.
• Different possibilities for joining pipes (low or high), which simplifies the selection (and installation) is the most convenient option.
• Turn on / off takes place by the action of the pressure of the flowing fluid, automatically.Suffice it to open / close the one of the water intake valves, and it is - an undoubted ease of use.
• Large power range.

Cons

• complexity of mounting the entire circuit.Even if you have to work with plastic pipes, that not everyone will be able to connect them securely to eliminate the possibility of leaks.As a rule, the owners have to pay for the work of professionals.
• system to function effectively requires accurate calculation of all parameters.And this is - is another challenge for inexperienced person.

Gravity model

Pros

• Small costs both on a water heater and its installation.
• Compact (small size allow you to install in almost any convenient place for owners).

Cons

• small capacity (up to 8 kW).
• Ability to work only one tap.If you want hot water, for example, and in the kitchen and in the bathroom, you have to buy 2 devices.

Power

It is for this parameter must have at least an approximate calculation.What to consider - how much you will need hot water?Navigate can such averaged data:

For approximate calculationsenjoy the simple formula:

typically, the temperature of the liquid in the water (at the entrance to the water heater) is taken equal to 5 ° C.This is enough to get the approximate value of the power.

There is an option determination of water flow through the documentation for the device.If previously requested to know its flow, it is possible to calculate the model for approximately nameplate power dividing by 2. This will determine whether the water heater will provide the user needs (provided the heating to 35 ° C).

But there is a caveat here.Are all households receiving bathrooms suitable procedures at the same temperature?Maybe someone who likes to take a douche?Not to be mistaken with the purchase, the power calculation result is desirable to increase by 15 - 20%.Is that not enough.

Body configuration

It should be protected from exposure to liquids, as these devices are mounted or in the back (pressure type), or in rooms with excessive humidity.The cheapest options - plastic and "stainless steel".

type of heating element

One of two - or heater coil.Regarding the latter should pay attention to its protection from liquids.How and how effectively it is enforced (insulation type)?

control method

hydraulic or electronic.This is someone as comfortable, but it's worth noting (this applies to any equipment) that the more complex the design, the failure occurs more often.And every repair has monetary value.

Everything else - the kind of supply (number of phases), various options (eg, remote control) and protection - at the buyer's discretion.Here, everyone is guided by their preferences and conditions of use of the product.

cost

For e / water heater flow type starts from 6080 rubles.

This article covers only the basic aspects of the problem of choice.It is not imposed on any view, and provides an objective analysis of the characteristics of various electric / water heater flow-through action.And which model to purchase (taking into account the information provided), to you, dear reader.

for residential building best option - about 9 kW .But if they are both included, and other devices (but in fact it takes place), whether the circuit breaker on the input work?So if you need just such a water heater, it will have to pre-install e agree with the supplier / energy.