Having the correct heating system is essential to keeping your house warm and comfortable during the cold months. An efficient and practical solution is provided by a combined boiler system for many homeowners, particularly those who live in colder climates. This post will go over the specifics of combined boilers for residential heating, including their advantages, how they operate, and why they might be the best option for your house.
What precisely is a combined boiler then? It’s basically just one unit that does two things: it heats your house and provides hot water. A combined boiler simplifies the process, saving room and frequently improving energy efficiency, in contrast to conventional separate systems, where you might have a separate boiler for heating and a separate water heater.
The adaptability of a combined boiler is one of its main benefits. Natural gas, propane, oil, or even electricity can be used to power these systems, depending on which fuel is most readily available and affordable where you live. Homeowners can select the option that best fits their needs and budget thanks to this flexibility.
The capacity of combined boilers to deliver constant hot water and heating throughout the house is another advantage. The fact that they are powered by a single unit eliminates the concern regarding temperature swings or uneven heating. You can rely on a combined boiler to keep you comfortable whether you’re relaxing in your living room, doing the dishes, or taking a shower.
| Boiler Type | Features |
| Combination Boilers | Efficiently heat both water and space simultaneously, ideal for small to medium-sized homes; provide hot water on demand, eliminating the need for a separate water cylinder; compact design saves space; suitable for properties with limited space. |
- What are the combined heating boilers
- Reviews of household two -fuel models: advantages and disadvantages
- Types of combined boilers
- Gas-wood
- On wood and electricity
- Electro gas
- On gas and liquid fuel
- Multi -fuel boiler units
- Best famous manufacturers and models: characteristics and prices
- Teplodar Kupper OK 15
- Teplodar Kupper Practitioner 14
- Buderus Logano G125WS
- STS V25 FG
- Video on the topic
- Combined boiler on four types of fuel!
- Corgan and gas mound base model
What are the combined heating boilers
Mixed -type boilers are exclusively floor, almost always single -circuit boiler units, only slightly exceeding standard gas or solid fuel boilers in dimensions. Their essence lies in the fact that in order to change the fuel used, it is only necessary to replace the removable burner or not to take any actions with the structure at all. For example, in gas-drunk boilers, the design and the principle of operation of the classic solid-fuel boiler are used: firewood is burned in the standard furnace chamber, heating the coolant in the heating circuit. But as soon as there is a need to switch to heating with gas, it is enough to install a gas burner in the openings of the front door.
Boilers make it even simpler, enabling the use of electricity as an extra fuel source. The heat exchanger’s coolant is heated by their design, which creates a nest for the heating element. Tenes can be turned on independently, for example at night, or in tandem with the primary fuel’s burning.
It’s critical to realize that, in 90% of cases, the cost of universal models exceeds that of two independent, comparably-equipped mono-legged boilers. Simultaneously, burning any kind of fuel in a combined boiler will almost always result in less efficient combustion.
Reviews of household two -fuel models: advantages and disadvantages
| Advantages | Flaws |
| Independence from one energy carrier and the ability to combine fuel types in order to save | In more than 90% of cases, the cost of a universal model is higher than two single -fuel |
| Significant saving of space, which is especially important for small private houses and cottages with an area of up to 100 m 2 . The combined heating boiler in dimensions and strapping practically does not differ from a single -fuel | Efficiency of combined models (in view of compromises in favor of universality) is almost always lower. When planning to burn gas in the design of a typical solid fuel boiler, it should be understood that the compromise design accumulates on average 3-6% less heat |
| Some models implement the possibility of automatic switching from one type of fuel to another in case of interruption | The heating system with two separate boilers is always more reliable than with one combined. Although the design of universal models is quite simple |
| The presence of not only single -circuit, but also double -circuit models | Owners often note the noise of the burners, not comparable to the standard burners of gas and liquid -fuel boilers |
| Most models are power -dependent – do not require connection to the mains | Advanced, effective and multifunctional automation is used only in multi-fuel expensive models worth 100-300 thousand. rub. |
| Lack of wall boilers and generally a small selection of models |
Combination boilers are particularly useful options for heating and insulating your home, providing a warm and comfortable living space for your private residence. These cutting-edge systems efficiently heat your space and your water supply thanks to their dual functionality. Combination boilers simplify your heating setup by combining the features of a water heater and a traditional boiler, which can save money and space. They provide a range of fuel options and are frequently compatible with biomass and other renewable energy sources in addition to gas and oil. Combination boilers are a desirable choice for homeowners who want to maximize the comfort and efficiency of their heating system due to their small size and energy-efficient operation.
Types of combined boilers
Gas-wood
Fuel options include coal, firewood, liquefied gas, anthracite, peat, and pellets.
Of all the combined models, natural gas and firewood boilers are the most prevalent. As we previously stated, gas-drunk boilers operate in the same manner as traditional solid fuel burners when burning solid fuel (the majority of models are not just for firewood). Additionally, a gas burner is fitted into the openings on the front door in case switching to gas is required.
Remember that the burner is typically not included with the boiler and must be purchased separately. With this apparatus, heating with solid fuel is profitable, but gas is ineffective due to the large furnace and the heat exchanger’s universal design, with an efficiency of about 75–85%.
Advanced hybrid models featuring two separated furnace chambers are available. These boilers allow for the simultaneous and independent burning of both gas and firewood. Due to the fact that every furnace chamber is made to burn a specific kind of fuel, this design is more efficient. These models, however, are rarely inexpensive—they typically cost between 250 and 350 thousand rubles.
How to select a gas-drunk boiler: every detail and nuance
On wood and electricity
Energy sources include coal, firewood, anthracite, peat, and pellets.
The working principle of electric boilers is even more straightforward. This is a fully solid fuel structure that has a nest beneath the heater (tubular electric heating), but it has the same measurements, a combustion chamber, and an identical appearance. The heating component of the tubular electric heaters is always removable, it is installed directly into the heat exchanger, and the contacts are visible through a hole in the boiler housing wall.
The typical heating unit’s power range is 3 to 9 kW, which is not enough to heat a 100 m³ or larger house solely with electricity, but it will help to speed up the heating process, even out the cyclical burning of solid fuel, and keep the temperature more consistently high. Even in homes that are 150 m 2 in size, the standard 6 kW of Ten can keep a pleasant temperature until the morning, based on owner reviews and exploitation practices.
Unlike other combinations, the cost of electrical models is only 10%–15% higher than that of plain analogs. The heating unit can be purchased separately or preinstalled from the factory.
Boilers of combined electricity and firewood Every aspect of selecting and evaluating the top models
Electro gas
Fuel options include coal, firewood, anthracite, peat, electricity, natural gas, and liquefied gas.
There are no gas boilers that are only electric. This is typically a hybrid of the first two types: a solid fuel boiler that can be equipped with a gas burner and a nest beneath a heating block. There are currently more drawbacks for electric gas boiler units than any other combination, and the only boilers with this combination are domestic models.
With foreign high-tech boilers that can use three different types of energy simultaneously, things are different. Nevertheless, their price starts at 300,000 rubles.
Electric gas boilers that are combined Every aspect of selecting and evaluating the top models
On gas and liquid fuel
Fuel options include waste oil, liquefied gas, diesel, fuel oil, and natural gas.
Despite sharing a similar operating principle, Gaza and liquid fuel boilers are significantly different from earlier combinations and have a more contemporary, high-tech structure. Firstly, they only use robust furnace chambers made of cast iron, whose design makes it possible to burn both kinds of fuel efficiently. You also need to replace the detachable burner in order to switch to a different energy source. This takes a minute because burners are fixed on unique, very useful mounts.
While gas and liquid fuel burners can be purchased separately, a boiler with two burners is worth two to three times as much as two separate plain analogues. Consequently, it is preferable to install two independent boilers—one for gas and one for diesel—if there is room in the boiler room. It’s also important to remember that every gas and liquid fuel boiler depends solely on energy (i.e., needs to be connected to the mains).
Boilers that combine liquid and gas fuels Every aspect of selecting and evaluating the top models
Multi -fuel boiler units
Fuel options include coal, firewood, anthracite, peat, diesel fuel, fuel oil, waste oil, and pellets.
Foreign high-tech models with advanced automation, two or more furnace cameras, and a value of over 250 thousand rubles account for over 95% of the market for multi-fuel boilers (by the type of Swedish CTC 2200 Trio).
The reason for the high cost is that one device, despite its small size, has separate top chambers that efficiently burn the fuel type for which they are designed. Boilers also have the capacity to burn any kind of fuel simultaneously, long-lasting cast-iron heat exchangers, and a second circuit for domestic hot water (typically with an integrated storage tank). These boilers’ automation enables you to precisely maintain a predetermined temperature, automatically change the fuel type being used, and connect external temperature sensors and controls.
Best famous manufacturers and models: characteristics and prices
Teplodar Kupper OK 15
Among the most effective and popular combination boilers for heating individual homes. able to burn natural gas (after installing a gas burner), coal, firewood, and pellets. It is renowned for its balance of affordability, dependability, and quality. One notable distinction is the inclusion of a 6 kW heating unit, which maintains the temperature at night and aligns with the cyclicality of burning solid fuel.
The boiler’s appealing appearance, high quality of assembly, and ease of cleaning are noted by the owners. However, nearly every budget price range has some drawbacks: a steel heat exchanger, a small furnace that can only hold logs up to 35 cm in diameter, not the best efficiency, and the need to purchase a gas burner separately.
Boilers for pellets with an automated fuel supply Burning time can range from 7 to 30 days because of the storage hopper.
Teplodar Kupper Practitioner 14
An even more affordable version of the OK 15 that was previously purchased, consistently taking first place in the rankings of combined boilers. Although it is equipped, its dimensions are even more compact. Among the benefits, owners frequently mention the useful cast-iron grates, the easy-to-access inclined firebox, and the convection holes in the case, which heat the room where the boiler is situated.
Buderus Logano G125WS
Gas and liquid fuel are available for German cast-iron boilers. With a heat exchanger that has more sections, an efficiency of 96%, multifunctional automation, and extra thermal insulation, it is dependable and distinctive. The boiler’s design is not only practical for use, but it is also simple to clean. Thermostats inside can be connected to external temperature sensors. Keep in mind that burners for gas and diesel are not included. As a result, in addition to the cast-iron structure’s heavy weight, another disadvantage is its comparatively high cost.
STS V25 FG
The most well-known dual-circuit, multi-fuel boiler. Almost any kind of fuel can be burned by it, including electricity, diesel, fuel oil, firewood, coal, coke, anthracite, peat, and pellets. It can also burn natural and liquefied gas. achieving more than 90% efficiency at the same time. Strong, corrode-resistant cast iron makes up the top chambers. Additionally, the DOS circuit has a cumulative boiler and an integrated 6 kW heating element to improve performance and provide prepared hot water more quickly.
Of course, the enormous weight of 385 kg and the height of more than 1.5 meters are the corresponding drawbacks of this design.
Price range: 300,000–500,000 rubles.
Combining the advantages of several heating systems into a single unit, combined boilers provide a flexible and effective solution for heating private homes. These systems offer homeowners an easy-to-use and space-saving solution by combining a burner for home heating and a boiler for hot water.
The versatility of combined boilers’ fuel sources is one of their main benefits. These boilers can use a variety of fuels, including natural gas, propane, oil, and even renewable energy sources like solar or biomass, giving homeowners the freedom to select the one that best fits their requirements and tastes.
Additionally, combined boilers are renowned for their energy efficiency, which lowers their environmental impact while saving homeowners money on heating expenses. These systems provide cost-effective and efficient heating for the entire house by maximizing combustion and reducing heat loss.
The capacity of combined boilers to supply hot water on demand, doing away with the requirement for a separate water heating system, is another advantage. This simplifies the entire heating setup and saves space, making maintenance and operation more convenient for homeowners.
To sum up, integrated boilers provide a comprehensive solution for heating individual homes by combining several features into a single, adaptable, and efficient system. These boilers offer homeowners a dependable and economical heating option for their homes thanks to their convenience, energy efficiency, and fuel source versatility.
