Combined heating boilers: classification, selection criteria

Combined heating boilers

Practice has long shown that not all devices and devices of a universal type are effective in operation. However, this does not apply to boilers. So, combined heating boilers can not only avoid unwanted cash costs for additional equipment, but also improve the quality of the result.

Their convenience lies in the fact that they can eliminate the dependence on a particular type of fuel. Thus, if necessary, you can change the type of fuel without changing the boiler itself.


  • Design specifics of combined boilers
  • Types of combined heating equipment
  • Diesel & Gas Processing
  • Three fuel boilers
  • Diesel, gas and electricity
  • Heating boilers for four types of fuel

Design specifics of combined boilers

Today, combined heating boilers – solid fuel electric or gas – are becoming more common in suburban residential buildings. Modern engineering ideas that allowed changing the type of burner and, as a consequence, the type of fuel, did not lead to a violation of the efficiency of the boiler.

When changing fuel, it is necessary to dismantle the old burner and simply install a new one. The design features of such heating boilers do not create any difficulties when installing a new burner. The front of the boiler body is equipped with a special flange hole for the burner. It is on this flange that the necessary burner is mounted depending on the type of fuel. So, for combined heating boilers, the following types of fuel are perfect: coke, ethanol, firewood, gas. This variety allows you to install combined boilers everywhere.

Combined boiler for heating a house

Combined type boiler

It is worth noting that in such heaters there is one design feature – a hot water supply coil. This makes them an excellent alternative to dual-circuit gas or electric boilers..

As a rule, in boilers of this type there are two fuel combustion chambers. One of them is intended for combustion of solid or liquid fuel, and the second for gaseous. In addition, almost all models of universal boilers have a built-in heating element.

Modern combined heating boilers – the most positive reviews about them – have not only several combustion chambers, but also several outputs that allow you to easily connect the required number of heating circuits. So, not only radiator heating can be connected, but also “warm floors”, heating of the winter garden or bath.

When choosing any heating boiler, it is necessary to study its technical characteristics and determine whether they correspond to operating conditions and requirements. Of particular importance is the power of the product. As a rule, modern heating devices for country houses and cottages have a power not exceeding 100 kW.

Such an indicator as fuel consumption per house area is difficult to calculate, since it all depends on the type of fuel and the selected power of the device. Currently combined boilers for home heating are installed in rooms with an area ranging from 50 to several hundred square meters. As a rule, domestic heating boilers are not designed for large areas. Thus, a combination boiler of one type or another is perfect for heating a standard residential building.

Types of combined heating equipment

The desired combination of various types of fuel determines the type of combined boiler. The following fuel combinations can be distinguished:

  • diesel fuel and natural gas;
  • solid fuel, gas and diesel;
  • electricity, diesel fuel and gas;
  • electricity, diesel, gas, solid fuel.

Diesel & Gas Processing

This combination of fuel is rather unusual, since one of the cheapest types of fuel is combined, on the contrary, with an expensive analogue. However, technically, this type of multi-fuel boiler is most effective.

Combined household heating boiler

Combined boiler: gas and diesel

It should be noted that separately diesel and gas heating boilers differ only in the type of burner, however, these differences are not significant. That is why the combined boiler of this type works without much difficulty and as efficiently as possible. Obviously, under such conditions, the transition from one type of fuel to another is carried out with minimal reconfiguration of the device.

Changing the type of fuel occurs without any loss in the efficiency of the universal heating boiler.

Three fuel boilers

The modern age is the age of high technology, when it is somehow not solid to heat a living room with ordinary wood. That is how many foreign manufacturers argue. However, some do not stop producing combined boilers that can run on gas, diesel and traditional solid fuels..

Multi-fuel heating boiler

Uses solid fuel, gas and diesel

The solid fuel used for heating a residential building is most often represented by coal, coke, firewood or wood briquettes. If you add gas and diesel fuel to them, then such a heating boiler can rightfully be considered universal.

However, such combined heating boilers are more solid fuel. It is this fact that determines that the boiler provides minimal automation of the working process and control over its safe operation. Undoubtedly, this type of heating boiler requires maximum attention. Its cost is low, which attracts many consumers.

Diesel, gas and electricity

Such a combined heating boiler is perfect for most residential buildings. However, it is worth considering that its capacity is unlikely to be enough to warm the house in the absence of gas or diesel fuel.

The main objective of this boiler is to maintain a sufficient water temperature in the heating system in the absence of a different type of fuel until it arrives. So, even at low temperatures, this will not allow the water in the pipes to freeze and violate their integrity, deform.

Combined heating boiler

Combined heating boiler: electricity, diesel, gas

In addition, the heater provides heating of the coolant in cases where the main fuel runs out and you have to switch to economical fuel consumption. Thus, this type of combination boiler is perfect for residential buildings of any size..

Heating boilers for four types of fuel

Due to the fact that this combined heating boiler implies the possibility of using solid fuel, it is most often used precisely as a conventional solid fuel heating device.

Combined heating boiler

Boiler powered by electricity, solid and diesel fuels, gas

Thus, such a boiler is chosen by those who want to save on the heating equipment installed in the house, since its price is quite affordable.

Thus, combined boilers are a universal means for heating a living room and a hot water supply device. Their use can significantly reduce fuel costs and reduce possible risks during operation of the device. The opportunity to change the fuel gives the owner of the combined boiler no worries about interruptions in its supply or an increase in the cost of previously used fuel. That is, the heat in the house will always be, regardless of how many degrees a thermometer shows on the street. The house is truly a fortress. Warm and reliable fortress.


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