Condensing boilers are well-known and appreciated devices with an established position in the heating industry. Currently, on the market you can find boilers that meet all the needs of users and are adapted to work in various buildings - single-family houses, apartments and tenement houses, as well as in commercial buildings, production halls, hotels and others. How to choose the right solution for each type of investment? Check!
Not only individual users face difficult choices when building a house or finishing an apartment. When building "for someone", you also need to research the market and select specific models, e.g. of heating devices. However, the richness of the offer makes it easy to fall into "decision paralysis" , so we have prepared a short guide that will help you determine what parameters to pay attention to in order to choose correctly and without spending too much time, and at the same time not overpay. Shall we begin? Well, let's start.
A dual-function stove for an apartment and a single-family house
The offer for houses and apartments mainly includes boilers with power ranging from 12 to 35 kW. There are different types: single-function boilers , dual-function flow boilers, dual-function boilers with a built-in tank and floor-standing boilers . Specially selected sets with a tank, external temperature probe and controllers create an integrated and complete heating system. An undoubted advantage of such boilers is the possibility of applying for funding for replacing a heat source under the Clean Air program , but unfortunately the construction of a new house, especially by a developer, destroys this option.
Check out the offer of single-function boilers in Onninen
Combination boiler for a commercial facility
The offer for facilities includes medium- and high-power boilers from 35 kW to even 900 kW, which can be used in large-scale buildings: halls, warehouses, schools, hotels and hospitals. Of course, we realize that the range given here is huge, but there is a simple way to calculate the power of a heating boiler in terms of the area and cubic capacity of the planned investment . It is assumed that to heat each 10 m 2 of the building surface, 0.6 kW of heat source power is needed, so a 100-meter house needs a small 6 kW furnace, and a warehouse occupying 2,000 m 2 - a device generating 120 kW. The largest boilers, with a capacity of 900 kW, will probably be useful only for heating churches and stadiums.
A wide range of maximum heating parameters to choose from is one thing, but modern condensing boilers in virtually every case are characterized by the ability to modulate the burner power . This feature allows you to adjust the power of the boiler to the current heat demand of the heated rooms, which translates into economical operation of the device without overheating the rooms. This option also means that you can initially choose a boiler with some margin (e.g. for future expansion of the facility), but only use it half-heartedly. In this way, increasing the heated surface/volume does not require replacing the heating device with a more efficient one.
The power modulation option also allows you to flexibly manage the boiler's efficiency depending on the external temperature. At negative temperatures, when the heat demand is high, the boiler is able to provide the appropriate amount of heat thanks to its high maximum power. However, as the external temperature increases, the demand for thermal power necessary to heat the rooms decreases, and in such a situation the boiler reduces the power at which it operates to match the current heat demand, and thus consumes less gas. Figuratively speaking, it resembles the burner of a gas stove, which can be adjusted with a knob, choosing between heating as quickly as possible or keeping it warm over low heat.
Which boiler should I choose? Product overview
We wouldn't be ourselves if we didn't propose a few specific solutions at the end. Here are the proven and recommendable models from our offer :
- Onnline duo 25 condensing gas boiler - high acoustic comfort (only 48 dB); latest generation stainless steel heat exchanger with aluminum burner door; high-efficiency circulation pump (EEI?0.23) with automatic air vent; easy-to-use control panel; the latest generation BLUEJET burner; a wide modulation range that allows you to adjust the boiler power to the current heat demand; with a fan with smooth speed regulation, electronically controlled; n low NOx emissions (the highest class 5); k complete security system; m possibility of optimized management of boiler operation thanks to cooperation with the room temperature controller; m possibility of connecting a room temperature controller with Open-Therm communication; m possibility of connecting a room temperature controller with a 0-10 V signal; m possibility of connecting an external temperature sensor; 7 years warranty (according to warranty conditions); with modulation range 11-100%;
- Victrix TERA 28 1 condensing boiler - wall-mounted, dual-function, flow-through gas condensing boiler, 28 kW; has a modern INOX stainless steel exchanger, the design of which allows for easier maintenance and reduces the risk of contamination; wide modulation range; possibility of remote management; central heating power: 4.3 ÷ 24.1 kW; DHW power: 4.3 ÷ 28.3 kW; domestic hot water flow: 14.1 l/min at ?t=30°C; gas type: GZ50, GZ41.5; heat exchanger in the form of a single-pipe stainless steel coil; the depth of the cauldrons is only 25 cm; adapted to the requirements of the ErP directive; smooth, electronic modulation of central heating and hot water, boiler self-diagnostics; energy-saving electronically controlled circulation pump; central heating expansion vessel, central heating safety group, probe on the return from the installation; possibility of weather control; possibility of cooperation with DIM zone sets; possibility of remote control using the DOMINUS application; lower connection cover included;
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Victrix ZEUS 25 dual-function condensing boiler - dual-function, wall-mounted condensing boiler with a built-in hot water tank with a capacity of 45 liters; heat exchanger in the form of a single-pipe stainless steel coil; adapted to the requirements of the ErP directive; smooth, electronic modulation of central heating and domestic hot water, boiler self-diagnostics; electronic gas valve; central heating expansion vessel, central heating safety group, DHW expansion vessel as standard; possibility of weather control, possibility of cooperation with DIM zone sets; possibility of remote control using the DOMINUS application; - EcoCondens Gold Plus 25 kW gas condensing boiler - a modern condensing boiler awarded the MTP Gold Medal, awarded the Medium Installation Leader 2016 statuette and the Golden Installer; additional sound insulation ensures very quiet operation of the boiler (48 dB); the latest generation stainless steel heat exchanger with aluminum doors, using "cold door" technology, the latest generation BLUEJET burner provides an extremely wide range of modulation; energy-saving circulation pump with automatic air vent, modulated electronically controlled fan; low NOx emissions (class 5), complete security system, modern control panel with LCD display, enabling intuitive operation and quick control of boiler operating parameters; manufactured in Poland, wide modulation range 11%-100%;
- THELIA CONDENS 25-A dual-function condensing boiler - dual-function condensing boiler with a silicon-aluminum exchanger.