Warming up the soil in the greenhouse greatly affects the quality of the crop. For this, gardeners buy special equipment, the price of which is scary. Read the article and find out how to make your own oven for heating a greenhouse.
Summary of the article:
Potbelly stove for a greenhouse
A potbelly stove is an unpretentious and economical option for organizing heating a greenhouse, which appeared in Russia after the revolution, during the times of war communism. An ancient Russian stove is considered the prototype of the device. The heater system is ingenious and primitive: an instantly heated dilapidated barrel with a welded-on firebox door, a chimney, a pipe for the outlet of warm air and a jumper in the upper third of the tank.
Sawdust, wood and coal are used as fuel for the installation. The intensity of combustion depends on the nature of the combustible fuel and the access of air to the furnace.
The only drawback of heating is the constant monitoring of the operation of the device.
The heating system is based on the following factors:
- The movement of hot air through a pipe laid in the central part of the greenhouse or on the sides.
- Formation of hot air above the lintel and exit from a special pipe.
- Thermal radiation from the planes of the oven.
Materials and tools
Most gardeners install a self-assembled stove to heat the greenhouse. To design such a system yourself, you will need:
- Cylinder made of sheet steel. A gas cylinder or a metal barrel will do.
- Steel pipe (diameter 15 cm).
- Steel strip.
- Electric welding machine.
- Marker and tape measure.
Fuel should be mentioned. The greenhouse oven is powered by wood, dry leaves, wood chips, twigs, straw, paper, food briquettes and similar waste, peat and coal.
Sawdust is an efficient fuel option and one of the cheapest methods. 5 kg of fuel will be enough for one use.
Drawings and diagrams
It is much easier to assemble a furnace for a long-burning greenhouse with your own hands, having a diagram in front of you. Let’s consider one of them.
The furnace body consists of two parts. The first is the base, which consists of a body and a chimney. Fuel is put here, and covered with a lid. The second part – the base – the firebox and the door. A fire starts here.
You can assemble the simplest oven in a greenhouse with your own hands in a few hours, because it is an easy and doable task.
Experienced designers recommend seeking help from a professional who will help you install the chimney correctly, weld parts and recommend the correct location of the device.
Having collected the necessary material and having studied the diagrams, proceed to the assembly.
- Take a metal can. Saw or weld the top off the cylinder. Finish the edges. It is important not to throw away the cut disc, but to save it. Later this part will be used as a cover (press).
- In the upper part of the cylinder from the side, make a hole for the chimney. The value should correspond to the pipe diameter. Paint the inner surface of the balloon in 2 coats. This will provide protection against corrosion.
- Make a small hole in the bottom of the cylinder to place the wood fuel. A rectangular hole is best. It is recommended to make a mobile installation for collecting ash. If this is not possible, it does not matter. Make a door. The design will seal the device tightly and ensure that the oven is sufficiently sealed.
- Weld the pipe in a conical shape from a medium diameter metal sheet. If the pipe is wide, the wood will start burning at a higher speed. Diameter – 12-15 cm at the top and 7-8 cm at the bottom.
- Install a partition with a hole in the center at the level of the door for storing firewood. The hole should fit the bottom of the cone in shape and size. At the bottom – firewood, and above – shavings.
- To close the oven, make a lid. From the upper part, which was cut at the very beginning, cut a hole for the pipe. Carefully cut and press with a smaller cylinder diameter so that the pipe goes freely. Cut a hole in the middle of the cover and connect to the purge pipe. Weight your abs. Attach steel strips or other similar material. The sawdust in the cylinder smolders, the press sinks lower under its own weight and interferes with the access of air.
- Prepare and weld the chimney.
- Attach the legs. The work is completely designed for improvisation. The number of legs does not matter. The main task is to achieve an even position of the oven so that the device does not wobble. There may be several legs.
Checking the efficiency of the furnace
Before installing a structure for a wood-fired greenhouse, it is necessary to take the time to check the efficiency of the device in the open air.
- Insert a metal cone into the cross-section between the compartments.
- Fill the top with sawdust and tamp thoroughly for prolonged heating. Fill more than half of the compartment with sawdust. Do not add sawdust directly during the operation of the device.
- Remove the pipe from the sawdust compartment. This will create a hole. Throw in little firewood. This will speed up the process. For frequent use, lay plump logs. The unit will run longer and faster. In the future, you do not need to toss any more.
- Light a fire. Wait for the wood to burn and the sawdust starts to smolder. Observe carefully the spread of smoke, the draft in the stove, the operation of the press. Adjust the draft by increasing or decreasing the length of the chimney.
- Close the cover if necessary.
Subtleties of stove heating
Now that you have your own oven, it’s worth talking about the intricacies of using it.
- Most summer residents recommend resorting to stove heating during early spring and autumn. Heating in cold winters is often unprofitable when using any fuel. In addition, it is much more expensive to build a winter greenhouse than a summer one.
- Fan effect. This device helps the greenhouse stove to perform better. Install a fan near the loading door and the combustion efficiency will increase dramatically.
Using a homemade polycarbonate greenhouse oven will only benefit and create optimal environmental conditions for the growth and development of a wide variety of crops.