WorksheetsSolid Fuel Fires
Total questions: 17
Worksheet time: 1hrs 25mins
(1.1.5.3)Looking at the diagram to the right, why is an air gap required between the flue and outer liner?
To prevent the liner from overheating and burning the timber in the roof.
To add an insulation factor to prevent heat loss
To help cool the primary flue
To prevent rodents from entering the flue and causing blockages
(1.1) Select the three main types of heat shield material.
(3.1) What happens if a solid fuel heater flue is not regularly swept?
Soot can build up in the flue causing a fire hazard.
The fire forms formaldehydes that can leak back into the room suffocating the occupants
Soot can build up in the flue causing carbon monoxide poisoning
(3.2) What is the most likely symptom of a faulty door seal?
Excess material spillage
Fire not maintaining an even temperature
Excess smoke escaping.
(3.2) Select the best material which would cause a flue to become sooted quickly?
(5.1) Which ones do not control the overall authority for the installation of solid fuel fires
Individual manufacturer’s specifications
AS/NZS 2918:2001 Domestic solid fuel burning appliances – installation
The Building Act 2004.
The Health and Safety in Employment Act 1992.
(5.2) Choose the two likely scenarios for when a local body inspection of the installation is required?
After completing a PS3
Following the completion of the installation.
Once you have tested the flue and the completion of the installation.
After you have lit it and its working good
(5.3) Choose the most effective fire for a large open plan room
(5.3) Explain what elements and how spillage can be checked for a fire’s performance
Spillage of POC's: smoke, ash, carbon monoxide
Hearth must be checked to make sure that ember spillage does not land onto flooring
check that the installed heater feels very sturdy and safe.
with the fire burning check the cowl for smoke emissions
(5.3) Explain what elements and how temperatures can be checked for a fire’s performance
check that the door, top of the heater and the flue will become very hot
The door, top of the heater and the flue will become very hot, the sides and rear of the heater should only be warm.
The fire should be warm to touch but not scalding hot
With the fire burning check the cowl for smoke emissions
(5.3) Explain what elements and how soundness can be checked for a fire’s performance
check that the installed heater feels very sturdy and safe
All of these options
The fire should be warm to touch but not scalding hot
With the fire burning check for unusual noises coming from the fire
(5.3) Explain what elements and how smoke & emissions can be checked for a fire’s performance
Adjust air inlet damper to allow more air in to increase burning and reduce smoke
Check the flue connection to the heater and all flue joints for emissions.
check that the installed heater feels very sturdy and safe.
With the fire burning check the cowl for smoke emissions
All of the above
(1.1.5.3) What is the minimum height a flue pipe should extend above the floor protector?
4.6 mtrs
1.5 mtrs above any roof structure
A minimum of 3 lengths of 1200mm flue
4.6 from the top of the fire
All of the above because they are specific to the site conditions
(5.1) How will you comply with the Building Code if manufacturer’s specifications/compliance certificates are not available?
Use the manufacturers literature
Use G12
Use AS/2928.1:2009
Use AS/NZS2918.2001
(5.1) What happens to the clearance factor when the minimum air gap between a single heat shield and the combustion surface increases from 12 to 25mm?
Nothing because it has a heat shield
The clearance factor increases from 0.40 to 0.30.
The clearance factor decreases from 0.40 to 0.30
The clearance factor of 0.40 is multiplied to the 25mm to give the overall clearance
(1.1.5.3) Look at the parts of this heater and flue . Choose which prevent heat transfer by conduction
A
B
C
D
E
(5.3) Which are the odd ones out for Dew point
‘dew point’ is the temperature at which water vapour condenses into liquid water making the inside of the cowl wet, which creates soot build-up
makes the inside of the cowl wet, which creates soot build-up
Condenses on inside of the cowl, runs back down the outer liner of the flue and rots the roof timbers.
No effect – because the cowl is outside the house it gets wet anyway
‘dew point’ is the temperature at which water vapour condenses into vapour (gas) making the inside of the cowl wet, which creates soot build-up
