Check out the best models in the independent 2025 gas boiler ranking. Avoid choosing untested models and opt for what is positively rated by independent experts
✅ The ranking is not influenced by companies distributing or manufacturing gas boilers, nor by companies directly associated with them.
We guarantee that our ranking is completely independent of gas boiler manufacturers and distributors - and that we are not commercially, advertising-wise, or financially tied to any company distributing or manufacturing gas boilers. As a company, we offer products related to the heating industry (mainly PHE-heat exchangers) and we deal with various heating devices on a daily basis, but we do not sell or advertise any gas boiler or furnace models. This ensures that the models listed below have been included in the ranking solely due to their outstanding quality, reliability, and efficiency. At the same time, you can be sure that the selection of boilers for the ranking was made by individuals with industry knowledge.
To the point, below we present the best gas furnaces you can invest in if you plan to install a gas boiler room in 2025.
Among gas boilers, the ACV Kompakt is practically a classic, appearing in similar rankings for some time now. It is a furnace of such good quality that it still successfully competes with models from other manufacturers.
In its basic version, it is a single-function furnace, but it can be expanded and equipped with a three-way valve to enable DHW heating. Available in power variants up to 40 kW - so there is practically no problem with fitting it to most single-family homes. A gas burner with low NOx emissions - so it also meets strict ecological requirements. Factory-equipped with a class A electronic pump - the manufacturer ACV declares the possibility of the Kompakt HRE Eco 18/24 model also operating in an open system. This is absolutely rare, certainly the boiler is durable and solid, which is also confirmed by its users.
An important advantage is also the relatively large number and easy availability of ACV brand service technicians. This is important, as at any time there should be no major problems with furnace inspection.
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Condensing boiler Termet SILVER PRO 20/25 - a Polish proposal from the Ferro holding, one of the Polish champions in the heating market. The device can successfully compete with other popular brands on the market. A modern dual-function boiler, convenient to use and highly energy efficient (class A). A high-efficiency coil-type heat exchanger.
Attention is drawn to the wide modulation range, quite impressive - as from the 100% range, it can modulate power depending on the need even down to 12%, which guarantees optimization of gas consumption. An interesting touch is the boiler's adaptation to work with solar collectors - to increase its already high efficiency. It also has a complete safety system. A position worth attention, the boiler receives very positive reviews.
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A very interesting position - not only because of the exceptionally long, 8-year manufacturer's warranty. A very compact and relatively lightweight wall-mounted boiler. Attention is drawn to the unusually highly efficient heat exchanger, but also the advanced hydraulic module - all of which translates into high efficiency and good performance.
The De Dietrich MCR3 EVO condensing boiler is available in variants from 15 to 35 kW - so here too there should be no problem with fitting it to a single-family home, even a larger one. It is worth noting that it is adapted to consume gas with a hydrogen admixture. It thus meets EU directives and effectively circumvents potential bans on the use of pure gas.
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A very good and solid, low-maintenance dual-function boiler from the French brand Saunier Duval - despite "only" a 5-year manufacturer's warranty. Of course, energy class A, it is worth noting the automatic modulation depending on the weather.
The Saunier Duval Thelia CONDENS boiler is also available in a single-function version. The manufacturer on its websites boasts high efficiency and low operating costs. This is actually a very good position when comparing the data provided by the manufacturer and user reviews.
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The Viessmann brand, Vitodens model, consistently maintains its price - a regular in the rankings of the best gas boiler options. The Vitodens 100-W is a classic available in both dual-function and single-function variants, with a power range between 3 and 29 kW. Its unique heat exchanger design ensures excellent energy transfer efficiency (Inox-Radial system). Viessmann is generally known for its reliability, perhaps because it doesn't skimp on materials, often using acid-resistant steel. Of course, it boasts an energy class A rating, but the manufacturer's warranty is slightly shorter - "only" 3 years, which seems modest compared to the above options.
However, Viessmann's advantage lies in its widespread recognition, which is always good news when you need to find a service technician.
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Again... Viessmann. This time with the Vitodens 050-W B0KA model, which has recently become very popular and sells very well. Not without reason - very solid construction and good quality, definitely a robust product.
The Viessmann Vitodens 050-W B0KA boiler is a dual-function model with a power output of up to 25 kW. An important advantage, especially for those who don't have a separate boiler room, is quiet operation even at high temperatures. The manufacturer also boasts an excellent circulation pump, which is rarely faulty and very efficient - and energy-saving to boot. Easy to operate - definitely worth considering.
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A gas boiler characterized by high energy efficiency, thanks to an excellent modulation system that optimizes fuel consumption. The XtraTech heat exchanger, made of stainless steel, allows for efficiency of up to 109.8% - considered one of the best solutions on the market. It comes with a built-in Wi-Fi module, allowing connection to an app and remote control of heating from anywhere via your phone (even outside the home, of course).
The Ariston Clas One Wi-Fi 24 boiler can be an interesting option for those who particularly value additional conveniences, comfortable and modern-style operation. However, this doesn't mean that it shouldn't be considered by those for whom energy efficiency is a priority - i.e., the best possible performance with low energy consumption. If a gas boiler can be called a smart device - then the Ariston Clas One Wi-Fi 24 is exactly that.
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Junkers-Bosch boilers, as you can see, are holding strong and continue to enjoy a good reputation. In this case, the Bosch Cerapur GC2200W 20/25C, a dual-function boiler with a sealed combustion chamber and a power output of up to 21 kW. The maximum efficiency of 109% catches the eye. It is also an eco-friendly option (the manufacturer declares low nitrogen oxide emissions). The warranty may not be the longest on the market, but it's not short either - it's 5 years.
The Junkers - Bosch Cerapur GC2200W 20/25C boiler features an intuitive, very convenient, and easy-to-use panel with a clear display and 7 buttons. Easy to coordinate with Cx series modulators (EMS2).
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The ranking of the best gas boilers is created by Nordic Tec, updated every few months or when new market information becomes available.
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