Gas Ventilation


Gas Ventilation

Unflued gas heaters or cookers are responsible for releasing combustion air particles in the room, and gas ventilation is the process thatremoves them to the outside area. Certainly, combustion products can make the area stuffy, therefore, perfect ventilation must be ensured in order to achieve a fresh-air environment. Moreover, combustion products contain water vapor, which after condensing can lead to the growth of mildew on the walls and ceiling. The installation of gas ventilation is the responsibility of the company or the homeowner. In case of having to install industrial vents, check with the local authorities because there might specific guidelines that need to be followed.  

The Need for Gas Ventilation

There are two obvious reasons for the need of gas ventilation: there is a specific requirement of air for the complete combustion of gas, and the poor ventilation of gas can lead to the production of a hazardous gas. Certainly, studies have shown that one cubic meter of gas requires ten cubic meters of air in order for it to combust properly. If the adequate amount of air is not supplied, then the fuel will be wasted, which in turn can lead to thousands of dollars wasted in your company. In terms of health hazards, the gas that is produced if there is poor ventilation can threaten to hurt your employees or family.

Types of Gas Appliances

  1. Flueless gas appliances: Flueless appliances do not have any potential ventilation system because they use the air in the room. Flueless appliances have specific restrictions in regard to the size of the room in which they are to be installed. For example, they cannot be installed in restricted areas such as bathrooms; neither can flueless cookers be installed in bedrooms. They require a minimum of twenty square meters for the proper gas ventilation to take place.
  2. Open fuel appliances: Open fuel appliances use proper chimneys and conduit for gas ventilation. They use air from the room for combustion, but they release the combusted material through the chimneys. The resultant decrease in pressure causes the fresh inlet of air from the ducts to be released. Open fuel appliances are forbidden from being installed in shower rooms, and in case they are installed in bedrooms, there must be an automatic device that will block the fire in case it delivers excessive heat.
  3. Room sealed appliances: Room sealed appliances obtain the necessary amount of air from outside, and the end product is also released outside. This makes these type of appliances the safest in the market, which can be easily used with the proper gas ventilation system.

Requirements for Air Vents

Air vents associated with gas ventilation must be maintained properly in order to prevent any malfunctioning. They are an essential part of the gas ventilation system and must be: 

  • Permanently open
  • Covered with a mesh so that it doesn’t get clogged with dust and other materials
  • Mesh is usually made with wire
  • Be rigid in nature
  • Distance between ducts must remain between 5mm and 10 mm


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