“I need to heat a workshop or a large hall. I don’t want to wait several hours for the room to warm up. Are there any heaters that can heat the air quickly?”
Hot air ovens with tube heat exchangers, often also known as Canadian stove or Bullerjan stove (Buleryan).
They can be recognized by the characteristic steel tubes that surround the combustion chamber. Their main function is the rapid transfer of heat to the flowing air.
How do convection ovens work?
The principle is very simple.
Colder air from the room flows through the lower openings of the pipes that run around the hot combustion chamber.
The water heats up in the pipes, rises, and flows back into the room through the upper openings.
We call this phenomenon natural convection.
This allows the oven to effectively heat a larger volume of air without the need for an electric fan.
Important: It is not that smoke or exhaust gases flow through the pipes. Rather, air from the heated room flows through them and is heated by the metal walls of the heat exchanger.
Why are they called Canadian stoves or Bullerjan?
The term “Canadian oven” has become popular in our country, especially for hot air ovens with characteristic tube heat exchangers.
Bullerjan is a well-known brand name for this type of stove. Sometimes you also come across the name Buleryan.
A similar principle is used today by various manufacturers.
However, not every convection oven is a Bullerjan. A convection oven can also have a different heat exchanger or fan design.
Where are hot air ovens suitable?
Their main advantage lies in the rapid heat transfer to the surrounding air.
Therefore, they are often used, for example, in workshops, garages, warehouses, halls, larger workrooms or in holiday homes and apartments.
They are particularly practical where you don’t need to maintain a constant temperature all day, but want to heat the room quickly upon arrival.
However, when making your selection you must consider not only the size of the floor area, but also the ceiling height, heat loss and possible heat leaks when opening the door.
What are their advantages?
Hot air ovens with tube heat exchangers offer several practical advantages.
- Rapid heat exchange with the flowing air.
- Possibility of heating larger open spaces.
- In designs with natural convection, no electric fan is required.
- The construction of a hot water system is not necessary.
- Robust construction, suitable for a wide variety of work environments.
However, the actual efficiency and fuel consumption always depend on the specific model and operating mode.
Do they also have disadvantages?
Yes.
Since they primarily release heat into the air, they may not be able to maintain the temperature for long after the fire has gone out. This depends on the design and heat retention of the specific appliance.
In high-ceilinged halls, warm air can accumulate under the ceiling, while remaining cooler near the floor.
In dusty environments, convection currents can also stir up deposited dust.
And above all: Not every workshop or hall is suitable for the installation of a solid fuel stove. In environments with flammable dust, fumes, or other fire hazards, operational safety must be professionally assessed.
Can I burn wood scraps from the workshop in it?
That’s a common mistake.
“I have a carpentry workshop, so I can throw all the leftover wood into the oven.”
NO.
Only fuels approved by the manufacturer of the respective oven and in accordance with the relevant regulations may be burned.
In particular, painted or chemically treated wood, chipboard, laminated boards, plastics or other waste materials are generally not permissible fuels for wood stoves.
Just because a material contains wood doesn’t mean it belongs in a fireplace.
Are they better than classic wood-burning stoves?
They are not automatically better. They are designed for slightly different needs.
Classic wood-burning stoves are often chosen for their appearance, glaze, and pleasant radiant heat.
Hot air tube ovens, on the other hand, are primarily designed to transfer heat intensively to the flowing air.
If you need to heat a larger workshop or open work area, they can be a very practical choice.
If you are primarily looking for an elegant stove for the living room, you might be more satisfied with a classic fireplace or a tiled stove.
What can you take away from this?
Hot air ovens with tube heat exchangers utilize the natural airflow, which heats up as it flows through metal tubes and then releases the heat into the room.
Their main advantage lies in their ability to quickly heat the air in the room to be heated.
They can be an excellent choice for workshops, warehouses, halls and other larger spaces, but only if their performance, design and safety features are suitable for the specific environment.
Therefore, when choosing a heating system, don’t just focus on the stated heating surface area. The actual heat loss of the room, its use, and the suitability of the installation are all important factors.