A boiler is said to be "sealed" when it operates independently of the air supply of the room in which it is installed. This principle is also known as "tight" or "forced flow"
Widespread in Europe, "room-sealed" boilers are of interest both in terms of the level of efficiency as well as the operational safety. Today most of the new systems installed in France are this type of boiler, generally in versions referred to as "high efficiency", but increasingly also in "condensing" systems whose performance is increasingly attracting interest.
Smoke extraction system in an individual house
Smoke extraction system in a multi-family building
The sealed-room principle is also referred to as "tight" and "forced flow", as a motor allows ambient air to be drawn in and the combustion gases to be expelled.
Extraction of the boiler is known as "under pressure", as opposed to traditional systems with a natural draw, which are "in depression".
The air intake and smoke extraction are ensured by two flues, which are generally concentric: whilst the external flue guarantees the supply of air necessary for combustion, the internal flue is also used for smoke extraction.
The system can also comprise two separate flues pipes. This mode of installation allows for larger distances to be covered between the boiler and the outside in particular, as made necessary by the location.
The flue pipes can be assembled by simply sliding them together or by using joining collars. All feature sealed joints.
Type A systems are not designed to be connected to a flue pipe or a combustion product extraction system. The combustive air is released into the room of installation. The combustion products are expelled via the ventilation system in the room at the same time as the contaminated air. E.g.: gas stove.
Type B systems are designed to be connected to a flue pipe or a combustion product extraction system. The combustive air is released into the room of installation. E.g.: wall-mounted boiler, gas radiator.
Cheminées Poujoulat is the specialist in production of metallic chimneys, chimney stacks , accessories for single houses, collective buildings, industrial and offices applications, for new buildings and renovations.
Cheminées Poujoulat offers a wide choice of solutions for flexible and rigid linings, connecting chimneys for all typs of appliances , inserts, wood stove, pellet stove, and boilers. Besides, Poujoulat can offer various solutions to improve the smoke evacuation : smoke extractor fans, warm air distribution, draft regulators, solution for maintening and sweeping the chimneys.
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