Unless you have a special type of flueless fire.
Wall air vents for gas fires.
One that expels gasses and another that draws in fresh air from the outside.
Air vents for flueless gas fires and stoves.
The purpose of a ventilator is to protect from rain vermin etc.
The major price difference between the two types of fireplaces is with venting.
Superior fires air vents are a necessity to have a complete fully functioning flueless gas fire or gas stove.
One to get rid of the combustion products which are very dangerous.
Direct vent gas fireplaces require two vents in the back.
However many direct vent fireplaces are vented with a single two chamber vent pipe.
These 7kw contemporary gas fires listed below have a power input rating of less than 7kw and do not require an air vent in the room and have a minimum flue size of 125mm pre cast or class 2 brick chimney.
If you don t have this your fire will create large quantities of dangerous fumes.
You need another to supply fresh air to the fire to get correct combustion.
Hello if your gas fire is what we call a decorative basket effect gas fire then automatically gas regulations state a 100mm ventilation hole through the wall directly to outside air if the fire is classed as an inset or surface mounted gas fire and as soon as it is rated over 7killowatts of power then you will also need ventilation direct to outside the reason for this is that potentially.
The regulation states that due to the air vent in the same room as the appliance the gas fire must be rated at 90 not 100.
On a normal gas fire you need two vents.