OFTEC Flue Systems for Oil 2

Question 1

What material is commonly used for flue pipes on domestic oil-fired appliances?

Accepted Answer

Stainless steel or vitreous enamel

Answer

Plastic PVC pipe

Answer

Copper tubing

Answer

Aluminium foil ducting

Question 2

What is the minimum flue pipe diameter for most domestic oil-fired boilers?

Accepted Answer

125mm (5 inches) unless the manufacturer specifies otherwise

Answer

50mm (2 inches)

Answer

75mm (3 inches)

Answer

200mm (8 inches)

Question 3

What is the purpose of a flue liner in a masonry chimney used for an oil-fired appliance?

Accepted Answer

To protect the chimney from corrosive combustion products and ensure gas-tight integrity

Answer

To reduce the chimney diameter only

Answer

To improve the appearance of the chimney

Answer

To make the chimney easier to sweep

Question 4

What is the correct method for connecting flue pipe sections on an oil-fired appliance?

Accepted Answer

Socket end uppermost (condensate flows) with all joints sealed using fire cement or heat-resistant sealant

Answer

Any orientation is acceptable

Answer

Joints should be left unsealed for expansion

Answer

Sections should overlap by at least 300mm

Question 5

What is a common sign that a masonry chimney flue is deteriorating when used with an oil-fired appliance?

Accepted Answer

Staining, damp patches, or tar-like deposits on the chimney breast or external brickwork

Answer

The chimney getting taller over time

Answer

The chimney changing colour to white

Answer

Increased draught readings

Question 6

What is the minimum separation distance for an oil flue terminal from an opening window?

Accepted Answer

600mm from any openable window, air vent, or other opening

Answer

No minimum distance is required

Answer

100mm from any opening

Answer

2 metres from any opening