4 Ventilation Flashcards
Adventitous air kW
7
Adventitous free air
35cm2
Adventitious doesn’t apply to (3)
Flueless
Compartments
DFEs
Vent openings
5mm to 10mm
Maximum height for vents indoors
No more than 450mm from floor
Vent outdoor height
No lower than 300mm, snow/ leaves
Air vent ducts should be limited to
3m length/ no more than 2 elbows
2 Room vent requirement
1-1
3 Room ventilation requirement
1-1.5-1.5
DFE vent >20kW
100cm2
OF Compartment high and low requirement: Outside
10cm2 low
5 cm2 high
OF Compartment high and low requirement: Internal
Low 20cm2
High 10cm2
Room sealed high and low: internal
10/10cm2
Room sealed high and low: External
5cm2 high - low
Cooker requirements 5m2
100cm2 - window
Cooker requirements 5-10m2
50cm2* - window
* unless there’s a door