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If gas is supplied to your house, then the question is: “Which is better – a gas water heater or a boiler?” – is not in front of you. In the article we will tell you how to choose a gas water heater. You will find out what are the advantages of technology, its features and characteristics, which models users prefer.
Principle of work and varieties
There are two types of gas boiler:
- Flowing.
- Cumulative.
Flow heater also called gas column. It consists of a metal case, a heat exchanger and a burner. As soon as the gas enters, the burner fires. It heats the water, which passes through the heat exchanger and exits through the mixer. The main advantages are fast heating and cheap fuel. However, to provide several sampling points, you need to choose a technique of high power.
storage boiler indirect heating is installed in separate rooms. The principle of operation is as follows: the body of the water heater is connected to the heating system and a double-circuit boiler (strapping in progress). Inside the tank there is a coil (heat exchanger) through which the liquid circulates. The gas boiler heats the heat exchanger, it gives off heat to the water, which diverges through the system and is used in the kitchen or in the shower.
The advantage of gas is the ability to use the boiler at any time of the year. Volumes of water can be huge: 100, 150, 200 liters. In production, tanks of 1000 liters are used. There are wall models, but most often users choose floor options.
Features of choice
In one of the articles we wrote, how to choose an indirect heating boiler, therefore, consider the features of the choice of gas instantaneous water heaters. What parameters to pay attention to first of all?
Rated power
To make the right choice, calculate in advance the required amount of hot water depending on the number of consumers. Speakers can be divided into three types according to power consumption:
- Low power – from 17 to 19 kW. Such devices are suitable for servicing two consumers and two intake points (for example, a washbasin and a shower). Give out about 8 liters per minute.
- Medium – from 22 to 24 kW. They are installed in private houses for 3-4 users.
- High – from 28 to 30 kW. Can be used for bathroom set and other purposes at the same time. Provides good pressure and heat.
Pay attention to the efficiency, which is indicated in the document. There may be useful and consumed power – you need useful. Otherwise, you risk buying equipment that will not meet your needs.
Ignition type
From this criterion depends on the convenience and safety of operation.
- Manual ignition. One of the first and budget models. To start heating, you need to hold the button and bring a match to the igniter. This method is inconvenient and unsafe.
- Piezo ignition. The difference with the first option is that a spark appears when the button is pressed. Mechanical inclusion is convenient if the device is nearby.
- Electronic type. As soon as you open the mixer, a spark appears and starts the process. It lights up when the batteries are running out.
- Hydrogen generator. The built-in mini-turbine is rotated by the flow of water and generates current. The flame appears when the faucet is opened. The higher the pressure in the system, the more efficiently the turbine will work and heat will be carried out.
Modulation system
The intensity of the flame in the burner can be adjusted by the user or by an electrical relay. Modulating burners adjust the power automatically. This is useful if there are pressure drops in the system. In this case, the device independently adjusts the heating force – the water at the outlet is of the same temperature.
Type of radiator (heat exchanger)
Their quality and service life depends on the material of manufacture. There are heat exchangers from:
- Become. Differ in considerable weight and resistance to corrosion.
- Highly purified copper. To the above qualities, you can add a high heat transfer.
- Copper. The radiator heats up unevenly, so cracks appear quite quickly in it from the temperature difference. Some manufacturers cover the product with heat-resistant paint, but still such a heat exchanger does not last long.
Output of combustion products
Since the heating in the flow heater occurs due to gas, the products of its combustion must be discharged somewhere. Combustion chambers are divided into:
- Open. Such devices are equipped with a chimney and ventilation. The air that supports combustion comes from the room. They have a high efficiency factor. But not all apartments can have a chimney.
Arrangement scheme:
- With closed chamber. The output is carried out using a fan through a coaxial pipe. Since there is no need to run a chimney, you can save money.
Important to consider! If you have plastic windows installed, they can interfere with natural ventilation. As a result, the ignition may not work or may be unstable. Way out of the situation: installation of a ventilation valve. He crashes into the window part.
Operational safety
If you take a geyser for an apartment, take care of your safety. To do this, make sure that the equipment is equipped with devices that control its operation.
- Traction sensor. Works when the chimney is malfunctioning. It closes the fuel start valve, excluding poisoning by gas products.
- Ionization detector. Turns off the device when the flame goes out.
- Electronic control unit. Controls the operation of the nodes, allowing you to set the optimal parameters to avoid overloads.
- Flow sensor. Starts the burner when the mixer is opened.
- Safety valve. It works with increased pressure in the system, dumping its excess.
- pressure detector. If there is not enough pressure in the line, the burner will not turn on to avoid damage to the radiator.
What else should be taken into account when choosing? First of all, the features of the room.
- The presence of a chimney for the removal of combustion products.
- The amount of water consumed and points of abstraction.
- Availability of free space for installation, ease of use.
- Room design and equipment.
It is better to entrust the installation of the device to a specialist. He must determine the draft, bring the pipes to the column.
If we compare gas and electric, then the latter are easier to install. However, gas is cheaper to operate. Below we have collected the best models of water heaters.
Browse popular models
What flow technique do customers prefer? We compiled this review based on user feedback.
Bosch WR 10-2P
The operation of the Bosch flow heater is based on a copper heat exchanger. Purified copper without foreign alloys has a high heat transfer. Product capacity is 10 liters per minute. Water flow and traction power can be adjusted separately.
The technique has an open combustion chamber, therefore, requires a chimney. Mechanical piezo igniter. The maximum heating reaches 60 degrees. The gas burner is made of steel, the power of the flame is regulated mechanically.
Safety system:
- Provides constant pressure and force of a pressure.
- There is a flame control ionizer.
- Traction sensor.
- Outlet temperature limiter.
Fuel consumption is 2,1 m31/h. Case dimensions: 58x22xXNUMX cm.
The cost is from 8 rubles.
Nikita
We are generally satisfied with the BOSCH WR 10-2P column. Thanks to the piezo ignition, the wick burns constantly, there is no need to light it with a match. I wanted to take a shower or wash the dishes – I opened the tap and got a hot stream. You can even mix cold and hot water. The pressure is stable. Another important advantage: the equipment can be taken for a house where a gas cylinder is installed. Works great, tested. Not without negative points – this is scum. Periodically, parts have to be cleaned from plaque, because the feed is reduced.
Oasis OR-20W
Simple rectangular body, discreet design. “Oasis” has a power of 20 kW and a capacity of 10 liters per minute. Management is fully automated. Ignition occurs electronically – using batteries. Triggered when the faucet is opened.
An LCD display is installed on the body, where the selected parameters and temperature are displayed. The switch “winter-summer” allows you to adjust the heating, as well as save during the summer season. The combustion chamber is open.
Dimensions: 34x59x14 cm.
The price is from 5 rubles.
Dmitriy
Chose a water heater with a shower. Basically, I didn’t want a storage boiler, because the children are small, it’s dangerous. In Oasis OR-20W, the temperature is conveniently regulated, and it doesn’t require any special settings. I set the parameters once, and have been using it for three years now. The technique consumes fuel economically, which is especially pleasing. And yes, the price is low. I advise everyone!
Ariston Fast Evo 14C
Stylish and modern Ariston equipment will fit into any interior. The column with an open combustion chamber has electric ignition. As soon as you open the faucet, the batteries fire and give off a spark. The LCD screen allows you to set the temperature with an accuracy of up to a degree.
The productivity is 14 liters per minute, and the power is 24 kW. Multi-stage protection system ensures safety during operation. It monitors: thrust, lack of flame, overheating. The heat exchanger is made of copper, therefore it has maximum efficiency.
The compact size of 37x58x23 cm allows installation in a small space.
The cost is from 10 rubles.
Sergei
I bought Ariston after the Neva leaked. I liked the design and automatic ignition. However, this model requires fine tuning. I suffered for a long time with installation and configuration, I had to use a pressure gauge to find out the exact pressure in the system. If you set the parameters “by eye” the work will be unstable. And since the pressure changes in summer and winter, everything has to be reconfigured. In general, the operation is successful, but if you don’t want to mess with the settings, take another option.
Baxi SIG-2 14i
A practical device with electronic ignition and controls on the panel. Has an open chamber. Power reaches 23,7 kW, can be adjusted thanks to the modulating burner. The burner itself is made of steel. The built-in reducer allows you to issue a stable pressure and heating without additional settings. The column produces 13,6 l / min.
The hydraulics are made of brass, so they are not subject to scale. The heat exchanger is made of copper and covered with a layer protecting against condensate.
Safety system:
- The draft sensor stops the gas supply in case of problems with the chimney.
- Ionization control.
Digital display available. Dimensions: 36,3x65x24,5 cm.
The price is from 12 rubles.
Ruslan
I was looking for a reliable device with normal metal parts, and not Chinese trash. Baxi SIG-2 14i is well made, there is a protection system, as well as a mechanical carbon monoxide fuse. The wick almost constantly burns, the carcass is only when I leave for a long time. The Baksi company is known in narrow boiler circles, so the gas workers appreciated the quality during installation.
Neva 4510m
After installing Neva, you will be able to receive 10 liters of hot water per minute. The power of the device is 17,9 kW. It can even work on liquefied gas from a cylinder. The panel is equipped with a display and two controls. The compact two-tier heat exchanger is made of reliable materials. The open combustion chamber is water-cooled.
Ignition is carried out automatically, electrically. Can provide no more than two sampling points. Built-in overheating protection. Size: 29×56,5×22,1 cm.
The cost is from 5 rubles.
Eugene
The column was bought two years ago, there are no special complaints. With reduced pressure, it may not turn on, but this happens very rarely. A gas worker friend pushed me to buy the Neva. He said that they almost never contacted the repair service with this model. While others have a lot of problems. I’ve only changed the batteries once in 2 years. So I recommend.
Electrolux GWH 265 ERN NanoPlus
The heater “Electrolux” is equipped with a copper radiator for water, which is made using OXYGEN FREE technology. Does not contain tin and lead. The burner is made of steel, the ignition comes from batteries when the tap is opened.
Characteristics: power – 20 kW, productivity – 20 liters per minute. The case has a window for flame control. The display allows you to conveniently use the two controls.
Built-in heating temperature limiter. The products of combustion are removed through the chimney. Model dimensions: 32.8x55x18 cm.
The price is from 5 rubles.
Alexey
The price matches the quality. I can not say that the assembly is bad. The technique functions normally, but some nuances must be taken into account. For installation, I called the guys from Mosgaz, they advised me that in this case it is undesirable to mix cold and hot water on the mixer. This reduces the life of the product.
I myself noticed that the GWH 265 ERN NanoPlus responds to pressure changes. When you take a shower and turn on the faucet in the kitchen, the temperature drops. In general, the quality of work can be correlated with the cost.
After studying the material and user reviews, you can make a choice. Before buying, decide for what purpose the device will be used, whether it can be installed in your premises.