Ventilation Flashcards
Reason for ventilation ,requirements for air vents,calculation of ventilator size.
When an air vent is installed on the inside wall of a property, the vent must be sited
Not more than 450mm from the floor level
The ventilation requirement for open flued Appliances is dependent upon?
Heat input
What action should the gas operative take if an air vent ,of adequate size but fitted with a fly screen,is encountered?
With the users permission remove the fly screen.
An open flued combination boiler with hot water input of 36kw(net) and heat input of 21kw(net) is fitted within a kitchen measuring 2.5m by 2.2m by 1.8m.what is the free area required?
145cm squared
A tumble dryer with an input of 5kw(net) is fitted in the kitchen in question before.An openable window is needed, but what is the additional vent free area required?
100cmsquared
If both the Appliances mentioned in question 4 and 5 were fitted in the kitchen ,what is the vent free area,in addition to the openable window ,required?
145 cm squared
A room sealed boiler with range rated burner from 16kw to 21 kw (net) is fitted in a compartment and set at 18.5 kw (net).what are the required vents direct out side?
105cm squared both the top and bottom.
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 2.2m by 1.8m.what is the vent free area required
No vent required
A gas fire and back boiler of inputs 7kw (gross) and 16kw(gross) respectively recently been fitted in a bedsitting room. What is the ventilation required?
Installation not allowed
The purpose of a top vent installed with in a compartment is to
Remove warm air for cooling
An open flued boiler with input if 21.8 kw is fitted in compartment and vented to a room .what are the ventilation requirements?
Compartment………
Top vent- 218cm squared
Bottom vent- 436 cm squared
Room vent…………..
74 cm squared.
What are the Causes of incomplete combustion?
Insufficient air for combustion, overgassing, undergassing, flame impingement and chilling, vitiation.
What are the visual signs of increasing combustion ?
Staining around the Appliances ,signs of sooting with in the Appliances, yellow flames with in the Appliances.
Carbon monoxide detectors should be installed?
Minimum 150mm below ceilings,
At least 300mm away from wall
Between 1.8m and 3m from fire source.
