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WorksheetsPhase4mod4 vent
Total questions: 15
Worksheet time: 8mins
The purpose of the top vent installed within a compartment is to:
Assist the pull of the flue.
Supply air for combustion.
Remove warm air cooling.
Reduce the pull of the flue.
The ventilation requirement for open flued appliances is dependent upon:
Heat input.
Heat output
Room dimensions
Flue height
If both appliances mentioned in 7 and 8 were fitted in the kitchen , what is the vent free area ,in addition to the openable window, required?
100cm2
145cm2
245cm2
290cm2
A gas fire and a back boiler of inputs 7kw(gross) and 16kw(gross respectively has recently been fitted in a bedsitting room. What is the ventilation requirement?
37cm2
68.6cm2
120cm2
Installation not allowed.
What action should the gas operative take if an air vent ,of adequate size but fitted with a fly screen , is encountered?
Install another air vent of the same size with a fly screen.
With the users permission remove the fly screen.
Leave the vent and instruct the user to clean regularly.
Disconnect the appliance and label.
A room sealed boiler with a range rated burner from 16kw to 21kw (net) is fitted in a compartment and set at 18.5kw (net).What are the required vents to direct outside?
51.75cm2 both top and bottom.
70cm2 both top and bottom.
92.5cm2 both top and bottom.
105cm2 both top and bottom.
An open flued combination boiler with hot water input of 36kw(net) and heating input of 21kw(net) is fitted within a kitchen measuring 2.5m by 2.2m by 1.8m. What is the vent free area required?
70cm2
130.5cm2
145cm2
180cm2
A tumble dryer with an input of 5kw(net) is fitted in the kitchen an question 7. An openable window is needed, but what is the additional vent free area required?
35cm2
50cm2
100cm2
No vent is required.
When an air vent is installed on the inside wall of a property, the vent must be sited:
Not less than 450mm from floor level.
Not more than 450mm from floor level.
Not more than 450mm from ceiling level.
Not less than 450mm from ceiling level.
A room sealed combination boiler with hot water input of 33kw (gross) and heating input of 25kw (gross) is fitted in a kitchen measuring 2.5m by 2.5m by 1.8m What is the vent free area required?
117cm2
113.6cm2
120cm2
No vent required
An open flued boiler with input of 21.8kw is fitted in compartment and vented to a room. What are the ventilation requirements?(remember the data badge does not state net)
top vent 120cm2 Bottom 120cm2 Room vent 120cm2
top vent 240cm2 Bottom 480cm2 Room vent 85cm2
top vent 218cm2 Bottom 218cm2 Room vent 74cm2
top vent 218cm2 Bottom 436cm2 Room vent 74cm2
Oil and solid fuel burning appliances installed in a room or internal space (in addition to gas burning appliances) shall?
Have no effect whatsoever on the ventilation requirements for the gas installation
Be treated as if they were gas appliances of similar type and rated input.
Be disconnected and a "DO NOT USE" label attached.
Only require an openable window.
In addition to one decorative fuel effect gas appliances, a room contains a gas cooker and one open flued instantaneous water heater of 25kw (net ) heat input. The room volume is 30m3 and the manufacture's instructions for the DFE gas appliance specify that 100cm2 of purpose provided ventilation is required for the appliance. What is the overall ventilation for the room?
125cm2
25cm2
325cm2
225cm2
What are the possible effects of double glazing, cavity wall insulation and draught proofing on ventilation provision?
It will result in an immediate dangerous installation.
It will have no effect whatsoever.
It may restrict the adventitious ventilation
It will require the removal of the double glazing, cavity wall insulation and draught proofing.
In addition to one decorative fuel effect gas appliance, a through-room contains the following appliances:
An open flued central heating boiler(21kw heat input).
One open flued gas fire (5kw heat input).
one gas cooker.
One open flued water heater(15.5kw heat input)
The room is 100m3 and the manufacturer's instructions specify that 100cm2 of purpose provided ventilation is required for the decorative fuel effect gas appliance.
What is the overall ventilation for the through-room?
195cm2
95cm2
295cm2
225cm2
