The firebox in the living room must in principle have its own air opening. It is used to replenish the combustion air discharged to the outside by the chimney and thus prevents the formation of vacuum in the room. Recommended is, to the living room, in which a combustible furnace is set up that consumes air, there was a possibility of inflow 1.6 m³ of air per 1 time and 1 kW heating power at vacuum 0,04 mbar. If there are other combustion chambers in this chamber, the total heating power of all chambers should be taken as the basis for the calculation. Aeration can take place through an opening in the wall leading to the outside or through leaks in the wall, under the door, in windows, etc.. Technical devices can also be used for this purpose. Since, as a rule, there is forced ventilation in the boiler room for central heating, it is recommended to make one opening for this room. However, just in case, let's consult a chimney sweeper in this respect. This is especially important, when indoors, in which the stove should stand, a mechanical cooktop extractor is fitted. The size of the room is also important, in which the combustion chamber is located. In a large space, it is much more difficult to create a negative pressure, than in a small one. In rooms with a living area of ​​less than 12 m², the tiled stove must not be used. In practice, it means, that we will almost never have to make an additional air opening for a ground furnace, we rarely make for a convection or combined oven, but always for an open fireplace (for the calculation of an open fireplace should be taken 340 kW and 1 m² of the combustion chamber opening). If it is possible to ensure air supply from the boiler room through the hole located under the tiled stove, then we should simply embed the pipe in the basement ceiling, which will connect the living room with the boiler room. The diameter of this pipe should be slightly smaller than that of the flue pipe (warm air expands). A metal or stoneware pipe should be used for this. The vicinity of the tiled stove is not very favorable for the plastic parts. In the place determined according to the floor plan of the tiled stove, drill a hole through the basement ceiling, insert the pipe and cover it with plaster. The end of the pipe on the stove side should be approximately level with the floor. Before that, we absolutely need to check, whether in place, where we want to embed the pipe, the basement ceiling girder does not run. Since the required amount of incoming air depends on the heating power of our stove, no definitive data can be given here. We have this advantage when supplying air through the boiler room, that it is already pre-heated by the waste heat of the boiler room and we do not need any shut-off device, which, in turn, is required when air is supplied directly from outside. If air supply through the boiler room is not possible, we should embed an air shaft in the wall of the building. It is irrelevant, that it is located directly in the area of ​​the furnace, or in another part of the room. However, the long distance between the air opening and the tiled stove can cause drafts. This hole should be made just below the floor, with a slight slope to the outside. Let's remember, there should be an air damper in the air shaft, used to cut off the air flow and prevent wind from entering the apartment during breaks in the stove's operation. An insect screen must not be missing under any circumstances. A ready-made air shaft with a shut-off device can be purchased at the Zduń plant.

Another possibility is to supply air through the basement. This method is effective, when there is no door in the building between the basement and the room, in which the stove stands, or when the door does not adhere tightly around the perimeter to its frame. The local chimney sweep master must also pick up the air supply system when receiving the chimney connection.

Because the dust and fine dust that is in the apartment falls on its floor, it is carried away by the combustion air and discharged outside together with the exhaust gas. Clean flows into the apartment, oxygen-rich air. This process is known as hearth ventilation.