Efficient heating of the house is not a problem! Rating of floor-standing gas boilers: which device is better

Double-circuit gas boilers are heating units, combining two devices: directly central heating boiler and water heater (boiler) that heats water for domestic use (DHW).

When a hot water tap is opened at a point of water intake (for example, in a bathroom), an electronic sensor detects this and, using a three-way valve, transfers all the thermal energy of the gas to the flow-through heating of water for DHW. When the tap is closed, the boiler again works for heating.

The technically complex design of a gas boiler and the large number of different units determine its rather large dimensions, therefore, as a rule, gas units are made in a floor-standing version and require a separate room for installation, but can also be made in a compact, wall-mounted version. Such boilers have a number of features: dimensions and weight significantly smaller than those of their floor-standing counterparts. Limited power (in the region of 25–30 kW), the most modern equipment, especially in terms of electronics, lower price.

Key Features

When choosing a floor-standing gas boiler, you need to rely on certain characteristics.

Power

The main boiler parameter to pay attention to. Required power depends on the area And insulation of heated premises, from the climate.

For dual-circuit systems, the required power is estimated by 30% more than necessary for heating. It is necessary to choose a boiler with a suitable power, since operation at a greatly reduced power sharply reduces the efficiency of the boiler.

Number of contours

Single-circuit boilers are distinguished by the best performance and reliability in their main function: heating.

If the issue of hot water supply is not so important, it is worth choosing a single-circuit boiler, as it is more reliable and repairable, and Provide hot water supply, for example, with an electric heater.

Combustion chamber type: which is better

1. Open

Boilers with an open combustion chamber operate due to natural draft, oxygen for burning gas comes from the room. Combustion products also partially enter the room, so you should take care of its high-quality ventilation to ensure reliable operation of the gas burner and to avoid carbon monoxide poisoning. The open boiler chamber also imposes restrictions on the chimney: it must be strictly vertical. Floor models are most often equipped with such a camera, but there are also wall-mounted versions.

1. Closed

The combustion process in these boilers is completely isolated from the room. and actually takes place outside. Air for the gas mixture is taken from outside the house, combustion products are also removed outside. This is ensured by forced-draft fans, which is why such boilers are also called turbocharged.

Photo 1. The structure of a gas boiler with a closed combustion chamber. The arrows show the components of the device.

The chimney can be made as in the form of separate pipes, So and in the form of coaxial — “pipe in pipe” designs, when combustion products are removed through the inner pipe, and air enters the boiler through the outer one. Due to the heating of cold air from the street by combustion products, the efficiency increases, and fans allow you to build a chimney of any configuration, even with horizontal sections.

Level of automation

The requirements for it depend on the complexity and area of ​​the building, on your personal preferences. For a small country house, you do not need to spend money on expensive automation, but if you are planning a serious central heating system for a cottage, this issue is also important. In addition, good automation increases the efficiency of the boilerIn cheap boiler models, control is often mechanical.

Operating principle

In addition to traditional boilers based on based on the principle of convection, are available for sale condensation models.

The efficiency of such boilers is 15-20% higher than convection, due to the use of the energy of condensation of steam, which is formed during gas combustion.

However, the cost of such devices is 1.5-2 times higher conventional, so they only pay for themselves if heating costs are high (in the case of large buildings).

Rating of the best floor-standing gas boilers for heating a private house

Below is the rating most popular models floor-standing gas boilers.

Dietrich DTG X 30 N

The automation is completely mechanical, which is why the advantages include: energy independence. But due to the price, the boiler is not worth much attention.

Photo 2. The structure of the floor-standing gas boiler model De Dietrich DTG X 30 N. The device is equipped with automatic control.

Specifications:

• power: 30 kW;
• Number of contours: 1;
• combustion chamber: open;
• Efficiency: 90.3%;
• coolant temperature: 30—90 °C;
• weight: 134 kg;
• production: Germany;
• price: 76 thousand rubles.

Protherm Bison 30 NL

The model from the Slovak manufacturer is interesting because it can work both gas and diesel fuel.

Specifications:

• power: 27 kW;

• Number of contours: 1;
• combustion chamber: open;
• Efficiency: 89%;
• coolant temperature: 35—90 °C;
• weight: 121 kg;
• production: Slovakia;
• price: 36 thousand rubles.

Siberia 11

Production JSC Rostovgazoapparat. The only boiler of all the reviewed models with a steel heat exchanger, which could not affect the weight for the better. At such a low price, these characteristics make the boiler ideal for heating a typical country house:

• power: 11.6 kW;
• Number of contours: 1;
• combustion chamber: open;
• Efficiency: 90%;
• coolant temperature: 30—90 °C;
• weight: 52 kg;
• production: Russia;
• price: 20 thousand rubles.

Viessmann Vitogas 100-F

Equipped with a modulating burner and Vitotronic controller with text and graphic display, simplifying control. The heat exchanger made of cast iron with graphite coating increases durability. The inflated price and heavy weight did not allow it to become the best.

Photo 3. Floor-standing gas heating boiler model Viessmann Vitogas 100-F (located on the left in the image).

Specifications:

• power: 35 kW;
• Number of contours: 1;
• Combustion chamber: open;
• Efficiency: 92%;
• coolant temperature: 35—85 °C;
• weight: 164 kg;
• production: Germany;
• price: 115 thousand rubles.

Vaillant atmoVIT VK INT 324/1-5

Advanced electronic control, various protections and self-diagnostic systems, as well as the ability to work both on liquefied and natural gas coupled with a moderate price make the boiler from the German manufacturer Vaillant the winner of our rating.

Specifications:

• power: 31.5 kW;
• Number of contours: 1;
• combustion chamber: open;
• Efficiency: 91%;
• coolant temperature: 40—90 °C;
• weight: 122 kg;
• production: Germany;
• price: 87 thousand rubles.

Useful video

Watch the video, which tells you how to choose a gas boiler for heating a private house.

Floor standing boiler: bigger but more reliable

The undeniable advantages of floor-mounted design include more durable materials in the construction, and the manufacturer’s greater attention to reliability and safety.

And despite the fact that such a boiler will cost more than a wall-mounted version, It will last longer and pay for itself many times over.

The characteristics described in the article will help you choose the best option for your home. The key point remains power.

It is necessary to involve specialists for technical calculations on heat loss in the building, if necessary. Otherwise, do not forget to rely on user reviews, and the house will always be warm and cozy, and the purchased boiler will please you for many years.