Combined heating boiler - new equipment that uses both gas and electricity to heat rooms. This technology will provide the house with heat in the event of a lack of electricity or a gas supply interruption. To use an electric gas boiler as efficiently as possible, a combined heating system must be installed in the house. It is designed at the beginning of the construction. As a coolant in a similar design is water. Proper installation and commissioning increases the life of the boiler.
Characteristics
Gas-electric heaters regulate the operation mode (on, off) automatically. Thus, the required temperature is maintained in the room, and resources are spent as economically as possible.
Combined heaters differ in the following characteristics:
- The small sizes. The design of such units provides oversized combustion chambers for gas combustion and heat exchangers with a built-in heating element.
- Low electricity consumption. The boiler mainly operates on gas, and the electric heater is started if necessary for the rapid heating of water, as well as in the absence of a gas mixture.
- Reasonable price. It is formed due to the absence of a separate chamber (furnace), since the heater is mounted in a heat exchanger. In equipment where there is no secondary circuit, an option is planned for the possible connection of a water heater.
- TENY with low power. Most of the models on sale only support the indicated temperature value. Water heaters begin to work in the event of the start of the electric mode of operation.
Gas is considered an economical type of fuel, which cannot be said about electricity. In this regard, for heating houses in areas with underdeveloped gas supply, it is better to find a variant of the boiler that runs on a different type of fuel.
An electric-gas boiler on average costs 70-80% higher than a purely gas boiler. But since the installation of such a unit is cost-effective, its cost fully pays off within 3-4 years.
Advantages and disadvantages
Electric gas heating boilers, like other devices, have their pros and cons.
Important advantages of units for 2 types of fuel are:
- high efficiency (reaches 97%);
- compact sizes;
- simple maintenance and repair of equipment;
- significant savings in the cost of resources;
- easy management;
- lack of waste from fuel combustion.
The gas-electric boiler also has disadvantages:
- high price in comparison with devices for 1 type of fuel;
- a three-phase network is required.
After a few years, the cost of an economical boiler pays off, since money is saved on a fee for the use of resources. The versatility of the unit greatly facilitates domestic problems.
A gas electric boiler has an important distinguishing feature: the presence of several outputs, allowing the device to be used as a multi-circuit. Such a boiler heats radiators, heats the sauna room, heats the pool and water for domestic needs. The “warm floor” design can also be heated by such a unit. Summer residents use one output for heating greenhouses.
Types of boilers by the number of circuits
Single-circuit devices are heating units designed only for heating network water. Dual-circuit devices also additionally provide hot water. They are a good option for installation in country houses. Two important tasks are simultaneously solved: high-quality operation of the heating system and constant availability of hot water are guaranteed.
Single-circuit
The power of such devices is quite enough for space heating. But such a unit cannot provide hot water on a regular basis. For these purposes, an additional DHW cylinder must be connected.
Double-circuit
If staying without hot water is impossible, you need to immediately purchase a dual-circuit gas electric boiler. Unlike single-circuit, in its design there is an additional heat exchanger that solves the problem of heating water. If capacity allows, you can increase the number of water outlets. To minimize the loss of water temperature, they should be located close to each other (boiler and parsing points).
All the shortcomings of gas-electric units are determined by technical characteristics and depend on the manufacturer. When choosing a heater, it is recommended to consult a specialist.
The nuances of choosing an electric gas boiler
The design provides for 2 chambers: for burning gas and for electric heating elements. Changing modes is automatic. In individual boilers, it is possible to adjust the cyclic mode of operation. It is useful at low temperatures, which can hold for a long time. When a sufficient temperature indicator is reached, the unit switches from gas to electricity. The joint use of both types of fuel allows to save costly resources, to make heating independent.
If the tank for heating water is not provided in the electric-gas boiler, a boiler is required. An electric pump is used to improve water circulation. The latter does not provide the ability to operate the gas part of the unit in the absence of electricity. Such a detail limits the use of such a device in multi-story buildings.
Rules for installation and operation
The combined heating system is installed by specialists from the gas service or a special organization according to a previously approved plan.
Work Stages:
- Installation of supports that will provide the necessary level for the heating unit. As a rule, they are present in the kit of the latter.
- Connecting the boiler to the gas supply.
- Mains connection.
- Installation of special filters for water and gas.
- Leak testing and cleaning of the heating system.
- Connecting the boiler to the pipeline.
- Establishing the work of the chimney.
- Test run of the heating system, troubleshooting.
- Final adjustment of the heating system.
The installation of a gas boiler is allowed in a room where, according to the rules and regulations, the supply and exhaust ventilation is equipped.
Basic rules of operation:
- During the operation of the combined unit, acceptable traction is necessary. In this regard, the chimney must have a sufficient cross section.
- The chimney used must be insulated to avoid ignition of parts that come into contact with it.
- When the boiler is used regularly, the ash pan should be cleaned periodically. The frequency of such procedures depends on the degree of gas combustion and the intensity of the unit.
- There should be a steel sheet in front of the combustion chamber, which will provide spark protection to the floor.
Electric gas heating boilers are considered the most technologically advanced and advanced.
Popular Manufacturers
In the Russian market, combined heating devices are represented by products of domestic and foreign manufacturers. The most popular are:
- Navien (Korea). Gas-electric boilers of the Korean manufacturer are fully adapted to the conditions of Russia. They are not damaged by frequent network voltage drops, do not respond to a drop in gas pressure. The use of such devices provides an opportunity to save money due to the low gas consumption. High-quality protection guarantees complete safety during operation. Operating modes of heating units are determined by self-tuning. You can control them using the remote control.
- Hercules (Russia). The gas-electricity boiler can heat the room up to 300 m2. A wide range of Hercules contains devices with different equipment depending on the functions. The presence of two circuits provides heating of the premises, a constant supply of hot water without additional burners. In such devices, the DHW circuit has a protective coating, which extends the life of the unit.
- CTC (Sweden). The manufacturer produces heating units with a capacity of 45 kW and the ability to heat up to 500 m². Their distinctive feature is the equipping of heating elements with a power of 15.75 kW. Internal automation allows you to keep a constant temperature of the water. Programming devices can be included in the design of boilers, which allows you to adjust the operation in accordance with street temperature conditions.
When choosing, it is recommended first of all to be based on the area of the room, its insulating properties, the availability of the required amount of money.
An electric-gas boiler for heating a private house has a complex structure. With its help, it is possible to heat a country house economically and efficiently offline. It is expensive, but the cost of acquisition and installation pays off quickly.
