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Gas Fired Models - Flues

An Aga requires some form of flue or chimney, so as to safely remove the natural products of combustion, at the same time taking cooking smells and steam from the ovens.

Gas fired Agas are available with several flue options, offering considerable flexibility of siting. Since the availability of an outside wall or chimney and the need to conform to strict safety legislation, tends to dictate the final positioning of the Aga, you should consult with your Distributor, who will need to carry out a site survey.

Therefore the following notes are for general information only.

Three options of flue types are available for a gas fired Aga, Open (conventional) flue, Balanced flue and Powered flue, which operate as follows:

An Open flued Aga requires vertical connection to either a masonry chimney lined with an appropriate flexible lining, or a metal, prefabricated, twin wall flue system may be used. In either case, the flue must be not less than 100mm (4inch) internal diameter and must extend up above the main roof, terminating with an appropriate cowl.

Bends in the flue must be kept to a minimum and must not be less than 135 degrees from the vertical ( e.g. allowing the flue to rise by at least 45 degrees)

Flue sharing with other appliances is not allowed.

For aesthetic reasons, black, vitreous enamel pipe may be used to connect between the Aga and the flue or chimney, but no bend should occur close than 600mm to the Aga outlet. Single skin pipe must not be used outside of the immediate kitchen area.

Permanent ventilation for a combustion air supply into the kitchen is recommended and in some cases may be essential, particularly if the room is well sealed, or there are other appliances fitted. Extractor fans and cooker hoods do not provide an air supply into the room as they are busy sucking air out! Normally an airbrick sized 6 x 9 inches will be sufficient.

Typical Open flued Aga Installation.

A Balanced Flue Aga is a ‘Room Sealed’ appliance requiring to be sited immediately against an outside wall.

There are restrictions on where a balanced flue may be sited, best summarised as follows:-

Minimum wall thickness 228mm Maximum wall thickness 600mm

‘A’ At least 300mm below an opening window. ‘E’ At least 300mm from vertical drain pipes etc.
‘F’ At least 600mm from a corner of the wall (either an internal or external angle)
‘G’ At least 300mm above ground level.
If in a car port( not permitted in garage) then, ‘D’ At least 600mm below car port roof, and
‘J’ At least 1200mm from opening door or window in the car port.

A Powered Flue Aga offers considerable flexibility in siting the cooker, as it does not have to be sited against an outside wall or requires a chimney. It can even be installed in an ‘Island’ or ‘Peninsular’ setting.

It uses a small diameter pipe (approx. 50mm) as a flue system, powered by a small electric fan inside the Aga.

Bends may be fitted (up to a maximum of 6) and the route taken can include passing underneath work units, under the floor, above doorways etc.

If only 2 bends are used, then the flue pipe can extend up to 9 metres in length.

In some cases it may be possible to discharge the flue pipe into an existing chimney if it proves difficult to reach an outside wall.

The permitted terminal positions are similar to those of the balanced flue shown previously, but dimension "E" is 150mm and dimension "F" is 200mm.

An airbrick into the kitchen will be required,

Please check with your Distributor, who will be able to visit site and advise further.