Oil boilers
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Oil boilers - efficient heating for your home
Oil boilers are modern and efficient heating systems. They offer many benefits to users. They are suitable for both single-family homes and larger facilities. At Onninen, we have a wide range of oil boilers from renowned manufacturers. Our customers can choose from various models and power. We will match the right device to specific needs.
We often hear questions about the advantages of oil boilers. Here are the main advantages of these devices:
- High heating efficiency
- Low operating costs
- Ease of use and maintenance
- Quiet operation
- Possibility of integration with other systems
Oil boilers are also distinguished by their versatility of application. They work well in various conditions. They can heat both small houses and large industrial facilities. Our offer includes devices with power from several to several hundred kilowatts. This allows us to choose the optimal solution for each client.
Types of oil boilers available at Onninen
Our range includes various types of oil boilers. We offer both traditional models and modern condensing devices. Here are the main types of oil boilers available at Onninen:
- Conventional oil-gas boilers
- Oil condensing boilers
- Oil boilers with integrated domestic hot water heater
- Floor standing cast iron oil and gas boilers
- Oil/gas boilers with different bodies
Each type of oil boiler has its unique features and advantages. Conventional boilers are suitable for simpler installations. Condensing models offer the highest energy efficiency. Devices with an integrated heater are a compact 2-in-1 solution. Cast iron boilers are durable and reliable.
In our daily practice we see a growing interest in condensing boilers. These modern devices allow you to significantly reduce heating costs. They use heat from exhaust gases, which is lost in traditional boilers. Thanks to this, their efficiency reaches up to 108%. This translates into real savings for users.
Renowned brands of oil boilers in the Onninen offer
We cooperate with leading manufacturers of oil boilers. Our range includes devices from brands such as:
- De Dietrich
- Ferroli
- Vaillant
- Wolf
Each of these companies has many years of experience in the production of heating systems. Their oil boilers are distinguished by their high quality of workmanship and reliability. De Dietrich is synonymous with innovation and energy efficiency. Ferroli offers a wide range of devices at attractive prices. Vaillant is famous for its technologically advanced solutions. Wolf is a guarantee of German precision and durability.
Many customers ask us about the differences between brands. Each manufacturer has its strengths. De Dietrich is a leader in condensing technology. Ferroli offers an excellent price-quality ratio. Vaillant stands out with its advanced automation. Wolf focuses on durability and reliability.
Choosing the right brand depends on individual needs and preferences. At Onninen, we help customers choose the optimal oil boiler. We analyze the specifics of the building, the heat demand and the user's expectations. On this basis, we recommend the best solution.
How to choose the right oil boiler? Practical tips from Onninen
Choosing the right oil boiler is a key decision. It affects the comfort of use and heating costs. At Onninen we advise customers on what to look for when choosing. Here are the most important criteria for choosing an oil boiler:
- Heating power
- Energy efficiency
- Burner type
- DHW tank capacity (if integrated)
- Adjustment and control options
- Dimensions and mounting method
Correct determination of the boiler power is crucial for its efficient operation. Too little power will not provide adequate thermal comfort. An oversized boiler will operate uneconomically. At Onninen we help to precisely determine the heat demand. We take into account the heated area, building insulation and climate zone.
Energy efficiency is another important parameter. Modern condensing boilers achieve efficiency even above 100%. This translates into lower fuel consumption and lower bills. At Onninen, we recommend devices with the highest energy efficiency class.
The type of burner has a significant impact on the operation of the oil boiler. Single-stage burners are simpler and cheaper. Two-stage and modulating models provide more flexible operation. We select the type of burner to suit the specifics of the installation and user preferences.
When choosing a boiler with an integrated hot water tank, its capacity is important. It must correspond to the demand for hot water in a given facility. At Onninen, we help determine the optimal size of the tank.
Modern oil boilers offer advanced control options. They allow precise control of temperature and work schedule. Some models can be integrated with smart home systems. At Onninen we advise which functions will be most useful in a specific case.
The dimensions and method of installing the boiler are aspects that are often omitted at the selection stage. However, they are of great practical importance. At Onninen, we pay attention to the available space in the boiler room. We select a device that will be easy to install and use.
Our experience shows that an individual approach is key. Each heating installation has its own specifics. That is why at Onninen we focus on personalized advice. We analyze the customer's needs and propose optimal solutions.
Recently, we used a cascade of oil boilers in a project for a large office building. This allowed for flexible adjustment of power to changing demand. The effect was a significant reduction in heating costs while maintaining full comfort.
In the case of modernization of older installations, we often recommend replacing with a condensing boiler. One of the implementations brought the client 30% savings on heating bills. The investment paid off within 3 years.
Oil boilers are a proven and effective heating solution. At Onninen we offer a wide selection of devices from renowned manufacturers. We provide professional advice and support at every stage. We invite you to contact our specialists. We will help you choose the optimal oil boiler for your needs.







