Pellet boilers
A pellet boiler does almost all the work for you. It saves you time by automatically feeding fuel from the hopper, adjusting output to meet current heating needs, and maintaining a constant temperature in your home without the need for daily stoking. With a modern pellet boiler and hopper, you only need to refill it once a week at most. It also reduces heating costs; with an efficiency of up to 93.7%, every kilogram of pellets is used to the fullest.
You can monitor and control the boiler’s operation from anywhere — all you need is a smartphone or computer. Whether you’re looking for the best pellet boiler for a new build or want to replace an old heat source, the Czech manufacturer OPOP offers reliable, long-lasting pellet boilers for every type of home and boiler room.
Modern Approach
The boiler is easy to control via the control unit’s display, from your phone, or from a computer.
Automatic Operation
The boiler automatically manages the heating process and necessary adjustments.
Money Saved
The boiler’s high efficiency saves you on heating costs and the time spent tending to the boiler.
Compact boiler size
Biopel mini boilers are both compact and highly efficient.
Everything you need to know about pellet boilers
Pellet boilers offer a modern, economical, and eco-friendly heating solution for single-family homes and small businesses. Thanks to automatic operation, low fuel consumption, and easy handling, they are the ideal choice for anyone who wants to reduce costs and save time associated with heating.
Pellet boilers fall under emission class 5 and meet ecodesign requirements. They feed fuel from the hopper automatically, ignite using an electronic ignition system, and automatically adjust their output based on current heat demand. You can conveniently monitor and control the boiler’s operation remotely from your smartphone or computer.
Unlike traditional wood or coal boilers, a pellet boiler with a hopper allows you to heat your home without daily refueling — maintenance is minimal, operation is simple, reliable, and cost-effective. The OPOP product range includes:
automatic pellet boilers,
automatic pellet boilers,
combined wood and pellet boilers,
combined coal and pellet boilers.
Advantages of OPOP Pellet Boilers
Control from your phone or computer at no extra charge
An internet connection is standard on all OPOP automatic boilers. You can start the boiler on your way home from work, check its operation while on vacation, or set a weekly schedule without having to go to the boiler room. The boiler works just like a gas boiler, but you’re heating with a cheaper fuel.
The boiler cleans and removes ash (almost) on its own
The Plus CA models feature built-in compressor-based cleaning of the burner and heat exchanger, as well as automatic ash removal. You practically only need to go into the boiler room to refill the pellets; maintenance is kept to a minimum.
A high-quality stainless steel burner is the foundation of long service life
Every OPOP automatic boiler features a durable stainless steel burner that withstands high temperatures and the aggressive environment of combustion gases.
Efficiency up to 93.7%
The boiler burns only as many pellets as it needs at any given moment, modulating output within a range of 10 to 100%. The result is low fuel and electricity consumption and operating costs that will pleasantly surprise you.
Modern electronic control unit for the entire heating system
The unit with a touchscreen display not only controls the boiler, but also manages mixing valves, hot water heating, the storage tank, and works in conjunction with solar panels. No extra charges for higher-level modules.
It ignites the fuel and shuts off automatically, just like a gas boiler
Automatic ignition and shutdown mean that the boiler ignites the pellets in the burner on its own and shuts off automatically when heat is not needed. The boiler room can operate without your presence for several days.
Pellet Boiler: Advantages of Wood Pellets for Heating
Pellet boilers are an increasingly popular choice for heating single-family homes, thanks to an eco-friendly fuel with high calorific value and stable properties — wood pellets. Pellets are produced by compressing sawdust under high pressure, resulting in small, uniform cylinders. They are a pure wood product, typically sourced from specialized pellet mills that process wood waste.
For best performance, we recommend using pellet boilers with a hopper filled with certified ENplus A1 pellets, which are bark-free and have a high calorific value. This makes it easy to keep the pellet boiler in optimal condition and prevents problems with deposits in the burner. One of the main advantages of a pellet boiler is the minimal need for operation and maintenance. Automatic boilers regulate fuel feeding from the hopper on their own, so refilling pellets is usually only necessary once a week. The boiler handles everything else on its own. In addition, wood pellets ignite and extinguish on their own, which allows you to maintain the desired temperature in the house without the need for a storage tank.
Main advantages of pellets for heating:
high calorific value (up to 5 kWh/kg),
low moisture content and minimal ash production,
simple storage and easy refilling,
clean combustion without excessive boiler clogging,
possibility of fully automatic operation without frequent intervention.
Comparison of the calorific value of wood pellets with other fuels
Wood pellets are a popular fuel not only because they are environmentally friendly, but also due to their stable calorific value and consistent properties. The average calorific value of high-quality pellets ranges from 4.7 to 5 kWh/kg, which is ideal for pellet boilers with automatic operation.
For example, thanks to this calorific value, a pellet boiler with a hopper can heat efficiently and consistently for a long time without the need for frequent refueling. Compared to other common fuels, pellets offer the following advantages:
| Fuel | Heat value (kWh/kg) | Note |
| Wood pellets | 4.7 – 5.0 | Consistent performance, low emissions |
| Wood — birch | approx. 4.3 | Depends on moisture content |
| Wood — oak | approx. 4.2 | Long drying process |
| Lignite | approx. 5.0 | Higher emissions, more ash |
| Black coal | up to 8.61 | High calorific value, but less environmentally friendly |
Unlike wood-fired heating, where the calorific value depends on the type of wood and moisture content, pellet heating is standardized. Pellets are uniform in size, have low moisture content, and consistently deliver a high calorific value. Compared to coal, they offer more environmentally friendly operation and significantly cleaner combustion.
Advantages and disadvantages of boilers with a hopper: How to choose the right model
Pellet boilers with a hopper offer a convenient heating solution requiring minimal intervention. Thanks to the integrated hopper with a feeder, they can automatically feed fuel as needed, ensuring stable and uninterrupted heating for several days, even when the owner is away.
Advantages of pellet boilers with a hopper:
automatic fuel feeding without the need for frequent refueling,
stable performance and even combustion,
minimal maintenance, often requiring only weekly pellet refills,
low emissions meeting current regulatory requirements,
the option to connect to smart controls and remote operation.
A potential disadvantage of these systems is their dependence on electricity — without power, neither the feeder nor the control unit will function. However, this can be addressed with a backup power source. The purchase price of a pellet boiler with a hopper is also typically higher than that of conventional boilers; however, lower fuel consumption, reduced maintenance, and a long service life will reliably recoup the investment.The size of the hopper directly affects how often you need to refill the fuel. A smaller pellet boiler, such as the Biopel Mini Tower, is ideal for spaces with limited capacity. In contrast, larger boilers with an external hopper can go more than a week without needing to be refilled.
How and When to Clean a Pellet Boiler
To ensure your pellet boiler operates with maximum heating efficiency and a long service life, it is essential to follow important maintenance guidelines for solid fuel boilers. A clean boiler burns more efficiently, produces less ash, and reduces the risk of malfunctions.
What needs to be cleaned:
- burner – of deposits and slag,
- heat exchanger – to maintain thermal efficiency,
- ash pan – usually once every 1 – 2 weeks,
- photosensor – monitors the flame and is sensitive to soot buildup,
- flue and chimney – inspected once a year by a professional.
With automatic pellet boilers equipped with a hopper, maintenance is significantly easier — many models feature automatic cleaning of the burner and heat exchanger, which saves a considerable amount of time and effort.
General recommendations:
for automatic boilers: inspection and cleaning approximately once a month,
for manually fed boilers: inspection once a week.
Don’t forget to perform a thorough cleaning at the end of the heating season — this will ensure a trouble-free start to the next season.
Frequently Asked Questions
How does a pellet boiler work?
A pellet boiler operates automatically — it feeds fuel from the hopper using a screw conveyor, ignites electrically, and adjusts its output based on current heat demand. This ensures stable and energy-efficient heating without the need for frequent manual intervention.
What is the fuel consumption of a pellet boiler?
Consumption depends on the size of the building, insulation, and operating mode. For a typical single-family home, annual consumption ranges from 2 to 3 tons of high-quality wood pellets. Automatic control helps optimize combustion and reduce costs.
How do you properly set up a pellet boiler?
It is important to set the correct fuel amount, air supply, and temperature settings. Most modern boilers offer automatic control or remote control; alternatively, it is advisable to have a professional handle the initial setup.
How do you light the boiler?
Most automatic pellet boilers have an electric ignition cartridge that starts the boiler without user intervention. With older or semi-automatic models, it may be necessary to light the boiler manually using a fire starter.
How does an automatic boiler work?
An automatic boiler feeds fuel from the hopper, regulates output, and ignites itself. Thanks to its electronic control unit, it operates smoothly, efficiently, and without the need for daily operation. The ideal solution for comfortable heating.
How to connect a boiler to a chimney?
The connection of the boiler to the chimney must comply with prescribed parameters — proper draft, diameter, length, and material. It is advisable to entrust the installation to a professional who will ensure safe operation and comply with technical standards.