The purpose of a down draught diverter is to?

• To divert the down draught to prevent interference with combustion

• To direct carbon monoxide into chimney

• To prevent down draught

• To prevent condensation from entering the applaince

An open chimney should rise vertically by what length in mm before any change in direction?

• 300mm

• 600mm

• 900mm

• 1200mm

Any bends used on a chimney should not exceed?

• 35°

• 45°

• 60°

• 90°

The maximum length of twin wall chimney pipe run to outside is?

• 1m

• 2m

• 3m

• 4m

The minimum clearance from the inner part of a twin wall chimney pipe to combustible material is?

• 15mm

• 25mm

• 50mm

• 170mm

A terminal is not required on a chimney which has an outlet larger than?

• 100mm

• 125mm

• 150mm

• 170mm

What is the minimum distance that a chimney outlet should terminate above the ridge on a pitched roof?

• 250mm

• 600mm

• 1m

• 1.5m

The annualr space between a chimney and a flexible metal flue liner?

• Does not need to be sealed

• Must be sealed at the top only

• Must be sealed at the top only

• Must be sealed at the top and bottom

A gas fire and back boiler is to be installed into an existing brick built chimney, what height chimney would need to be lined?

• Any length of chimney must be lined

• 6m

• 10m

• 12m

The catchment space in the unlined brick chimney, which was previously used for an oil boiler and is now intended to serve a gas fire, must have a minimum

• 2 dm³

• 12 dm³

• 75 dm³

• 250 dm³