Why do some fires require an external air vent and others don’t?
Quite simply it depends of the type of fire you want to have installed. Fires that consume the least amount of gas may be able to draw sufficient air from the surrounding space to work perfectly. The surrounding space is itself ventilated around the tiny, almost invisible, gaps around doors and windows and this ‘adventitious’ ventilation is enough for some fire types. However ‘adventitious’ ventilation is not adequate for all fire types so check with your retailer or installer before making the final decision about the fire you would like to have fitted.
