Gas Fire Venting Information, help and advice on many gas related subjects from gas fires to domestic appliances

[cgwalsh]

I am looking to buy a new gas fire to replace an old one, the new one will fit flush with the wall. A lot of the fires we like indicate they need venting. Does this mean the room needs a vent on an outside wall or is there some sort of vent required on the fire?

Thanks
Colin

[htg engineer]

The manufacturers instructions will tell you if any purpose made ventilation is required.

Gas fires with a heat input of 7kw or below do not require any ventilation.
7kw> do require ventilation.

DFE (decorative fuel effect) fires require 100cm2 purpose made ventilation.

To work out the ventilation required for open flued appliances, you take the

(Heat Input) - 7 x 5 = ventilation required

7 is the 7cm2 adventitious ventilation is allowed for in every room, this is provided by tiny cracks around doors and windows etc this is why a gas fire of <7kw does not require any ventilation as 7(cm) - (7kw) = 0