This is normal. There is practically no oxygen inside the furnace, and a high temperature is maintained. When the door is opened, a large amount of oxygen enters the chamber, causing an intense combustion process. As a result, when opening the furnace with a large amount of coal inside, flames up to 15 cm high may appear, lasting no more than 2 seconds.
We strongly recommend opening a loaded furnace slowly. This way, the intense combustion process will end before the door is fully opened. Additionally, it's important to exercise common sense—do not place flammable objects or substances in the ignition area, and open the furnace at a safe distance from your face.

Of course, it would! However, at 750°C, some brands of coal start to develop a certain level of brittleness. This temperature range is optimally chosen both for working with a wide variety of coal brands and for the comfort of the operator. After all, the coals need to be taken out of the furnace, and it’s very hot in there.

However is convenient for you. There are no standards. But we recommend using the scoop that comes with the furnace. First, load the coal into the scoop, and then place the contents into the chamber.

One of the advantages of the furnace is that cleaning is not required. The only byproduct of operation is ash, which burns off when the furnace is operated within the recommended temperature range. Therefore, the chamber remains clean at all times.

Coconut coal always emits a specific odor when ignited. The difference compared to popular open-type ignition methods is that the smell doesn't spread freely throughout the ignition area (room) but instead exits through a narrow ventilation opening under pressure. Therefore, even a relatively weak exhaust system will be sufficient to remove 100% of the unpleasant odor from the room.

Buy a lottery ticket because you’re lucky! But seriously, contact our company using any convenient method listed on our website in the "Contact Us" section, and we'll take care of everything 🙂. Meanwhile, it's important to note that each furnace is inspected and undergoes an initial burn-in before being shipped to the customer, so the occurrence of defects is extremely unlikely.

During the first 30 minutes of operation, while the furnace is heating up, it consumes 1.8 kW of electricity. Not all extension cords can handle this power, which can lead to them failing. Therefore, it is recommended to use fixed outlets when operating any heating device, including the OVEN furnace. If there are no free outlets, you should consider installing an additional outlet or redistributing the load among the existing devices.

The thermocouple is a ceramic rod. When the coals come into contact with it, nothing serious happens, but the rod is quite fragile, so regular physical contact could affect its integrity.

Any malfunctions in the operation of the furnace or changes in its appearance that are not the result of normal use of the furnace.

35-40 minutes. If the break between shifts is around 12 hours, the furnace cools down to 120°C. To reignite the coal, the furnace needs to be brought back to the working temperature. However, you can load the coal even into a "cold" furnace. Thus, within 40 minutes, you will have the required amount of ignited coal.

Yes, it can, but make sure to seal the door tightly. This way, at the beginning of the shift, you will find that the coals are nearly completely burned out, and the temperature in the chamber will be higher than if they were not left in, which will slightly speed up the furnace's heating time at the start of the shift.

This is natural, as oxygen does not reach the coals in the center of the heap. Therefore, the ignition process does not begin.
There are two recommended methods for working with a large amount of coal:

• Piling the Coals: Pile the coals in a heap. After 7 minutes, the entire top layer of the heap will be perfectly heated. You can then remove and use the coals as needed. This way, the center of the heap will gradually heat up, and you'll always have ignited coals available.

• For Large Quantities: If you need a large amount of ignited coal (more than 100 cubes) at once, pile them up, wait for complete ignition, and then mix the coals in the furnace all at once. This way, all the coals will get access to oxygen and ignite.

This can happen during the first few minutes after removing the coal from the oven. It occurs because the coal was in an environment with extreme oxygen deprivation. Give it a couple of minutes in the open air or in the Kaloud, and it will turn red again. Even when dark, it won't release the characteristic taste or smell of coal and will still provide stable, consistent heat.

It consists of a shaft that leads directly into the chamber and is covered at the top by a plug made of porous material. When loading 500 grams or more of new coal into the oven, it is recommended to remove the plug for up to 10 minutes. During this time, all combustion by-products will naturally be expelled from the chamber. This way, when the door is opened, the occurrence of any specific odors is eliminated.

When using any popular open-type coal ignition systems, 25 mm coal typically reduces to 23-24 mm once ignited. However, when using the OVEN and starting with 25 mm coal, after 1.5 hours in the chamber, the coal still maintains its original size of 25 mm.

It's important to consider that after ignition, the coal maintains its original size, accumulates ash much more slowly, and provides a high level of heat for a longer time due to thorough heating. Because of this, when replacing coal for guests, these factors should be taken into account, and the number of "fresh" coals should be adjusted accordingly.
Under standard usage conditions, no more than one fresh coal will be required. Additionally, the time between replacements should be extended by 1.5 times your current interval. For example, if you previously replaced the coal every 20 minutes, we recommend doing so no more frequently than once every 30 minutes.