Appliances classed as B¹¹ will have a?

• A fan down stream of the heat exchanger

• Fanned draught with electronic flame supervision device

• Less than 40kw heat input

• Natural draught chimney with a draught diverter

The main safety advantage of appliance type C by comparison to type B appliance is that?

• It can be used during a power cut

• It is more efficient

• It requires less maintenance

• The combustion process is sealed from the room

A terminal guard is required when the room sealed chimney is less than?

• 1.5m above ground level

• 1.8m above ground level

• 2m above ground level

• 2.1m above ground level

A balanced compartment is?

• Must be vented on the wall at high and low level directly to outside

• May be vented to either the room or to outside

• Is designed to achieve the advantages of a balanced chimney balanced appliance

• Must be constructed entirely of fire resistant materials

On a SE Duct chimney system appliances must be?

• Open flued

• Fitted with an air pressure switch

• Installed in basements

• Room sealed and specially certified for use on these chimney systems

On a U Duct chimney system the?

• Inlet and Outlet are above roof level

• Inlet and Outlet are at floor level

• Inlet at height level and outlet at low level

• Inlet at low level and outlet at high level

A vertex chimney system provides?

• A room sealed balanced flue

• A room sealed appliance utlising an open flue

• An open flue fanned draught appliance

• An installation whereby the loft space between a balanced compartment