Ventilation

How do we convert gross to nett?

• Times by 1.1

• Divide by 1.11

• Minus 1.1

• Divide 1.5

What is adventitious ventilation?

• An extra wall vent

• Air that can leak in unintentionally through structural defects

• An openable window

• A balanced compartment fed by ducts from the loft

Up to how many KW is covered by AV?

• 5

• 7

• 10

• 11

What are the max and min opening sizes for a gas vent?

• 7-14mm

• 5-20mm

• 5-10mm

• 10-15mm

Which of the following is not acceptable in an air vent?

• Gauze

• Fly screen

• Closable grille

• Internal baffles

An open flued boiler with a maximum gross heat input of 21kw fitted in a kitchen, the ventilation requirement will be?

• 59.59cm²

• 105cm²

• 70cm²

• 55cm²

An air brick positioned above a natural draught balanced flued boiler of 7-14kw input should be a min distance away of?

• 1500mm

• 300mm

• 2000

• 600mm

A 13kw cooker installed in a kitchen of 8m³ with a door which opens direct to outside req?

• 50cm²

• 50cm² plus an openable window

• No ventilation req

• 100cm²

When vents pass through more than 3 rooms (in series) how much bigger than the external vent should these vents be?

• 30%

• 50%

• 75%

• 55%

What are the high and low vent requirements for an open flued boiler in a compartment vented direct to outside?

• 10 & 20 cm² per KW

• 5 & 10 cm² per KW

• 10 & 10 cm² per KW

• 5 & 20 cm² per KW