Air Supply And Ventilation

It is an essential requirement that your wood burning or multi-fuel stove has an adequate air supply to ensure that complete combustion of fuel occurs and your chimney functions as it should.

The primary source of this air supply for a stove comes via a permanent air vent positioned within the room. This is in fact a regulation for stoves with an output of 5kw or higher as the lack of an air supply will negatively impact the performance of your stove and the flue system.

Air ventilators are available in various sizes to allow differing volumes of air into the room and the size you may need depends on the output of your stove. Put simply, the more powerful your appliance is, the greater the air supply needed.

To calculate the size of ventilation required for your stove, simply follow the formula below:

• FOR HOMES BUILT AFTER 2008 - 550 mm2 of air vent size per kW of stove output
• FOR HOMES BUILT BEFORE 2008 - As above but disregard first 5kW of stove output

So, if we take an 8kw stove as an example:

• AFTER 2008 - 8(kw) x 550(mm2) = 4400 mm2 of air vent required
• BEFORE 2008 - (minus first 5kw) = 3(kw) x 550(mm2) = 1650 mm2 of air vent required

Once you have calculated the size you require, simply select the appropriate Rytons AirCore Ventilator for you. These range in size from 6800mm2 all the way up to 11100mm2.

Properties built after 2008 are deemed to be relatively air tight and so require larger ventilators as air is not leaking into the property around windows and doors. It is worth remembering before you position your air vent that there will be a trail of air passing between the vent and the stove so best to place this somewhere this causes the least disturbance.

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Comments

David Gordon says:
7th April 2020 at 6:43 am
Hi, I am putting a log burner into a new build property with a ventilated block and beam suspended floor. Can we ventilate the log burner into the zone below the suspended floor?

Andrew Shuttleworth says:
7th April 2020 at 2:00 pm
You can indeed utilise the space beneath a suspended floor to supply the air required for your stove, assuming of course that there is enough space there to allow the volume of air required for your particular burner