Currently, gas boilers are the most in demand. The reason is the cheapness and availability of fuel.
Double-circuit gas boilers are popular due to their safety and practicality, cost-effectiveness, they are designed to heat water for heating and for hot water supply at home, unlike single-circuit boilers, they heat water only for heating.
About half of all houses in our country are equipped with gas wall-mounted boilers that heat an area of up to 300 m2, in addition to providing residents with hot water. They are out of competition for apartment-by-apartment heating.
Powerful floor-standing boilers are suitable for heating a large cottage or an administrative building.
These boilers are about half the price of floor-standing ones (here you need to take into account the cost of equipment for their installation). The advantages include simple installation, compactness and the ability to place them almost anywhere in the house or apartment.
The power of the units can be roughly calculated as follows: 1 kW of boiler power is needed to heat approximately 10 m2 of insulated space with ceilings up to a maximum of 3 meters. In case of poor insulation, the house requires an increase in power by 30%-50% or more.
Double-circuit gas floor-standing boilers are equipped with a cast-iron or steel heat exchanger, and the type of gas burners (inflatable and atmospheric) also differ. Cast iron heat exchangers are much more durable than steel ones and are not susceptible to corrosion. Supercharged burners are characterized by a high price and higher efficiency. Supercharged burners can be replaced, atmospheric burners cannot be replaced, as they are integrated into the gas boiler circuit. Boilers with supercharged burners are quieter than those with atmospheric burners.
If the full capacity of the boiler is needed 2-3 months a year, then it would be better to buy two-stage rather than single-stage boilers. Multi-stage ones are used when there is no need for constant heating of housing, that is, in the case of a rare full-power switch.
In double-circuit floor-standing gas boilers, the ignition system is of two types: piezo ignition or electric ignition. Piezo ignition is less economical because it has a continuously burning wick. Piezo ignition, due to its energy independence, is indispensable where there are light interruptions.
Installation and installation of wall-mounted and floor-mounted double-circuit gas boilers must be carried out by a specialized organization. Installing floor models is much more difficult and the services of installers will be more expensive.
In all units, the built-in automation ensures safety when the gas is turned off, the draft is lost, the water level in the system drops below normal, as well as in other cases.
The models of the following brands: BAXI (Italy), ARISTON (Russia), Villant (Europe) have received consumer recognition. The products of these brands are modern and reliable, adapted to Russian conditions, and have been recognized by consumers.
Double-circuit gas heating boilers are complex equipment, the purchase of which must be approached after weighing and carefully considering everything, consulting with specialists and considering various options, and in the case of the upcoming construction of a house, such an issue of installing a certain type of boiler should be considered in advance.
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