Calc & install natural ventilation for Type A gas appliances

Incomplete combustion of a fuel gas will result in the creation of which three products?

• Carbon monoxide

• Soot

• Carbon dioxide

• Aldehydes

What must the proportion of fuel gas to air be for complete combustion to take place for NG?

• 1m³ of NG requires 9.5m³ of air, or 1:9.5

• 1m³ of NG requires 10m³ of air, or 1:10

• 1m³ of NG requires 15m³ of air, or 1:15

• 1m³ of NG requires 24m³ of air, or 1:24

Why do ventilation calculations differ between older/newer buildings? (2)

• Older buildings had natural ventilation from gaps around doors and windows

• New buildings are sealed tightly to save energy, reducing airflow

• Older buildings were sealed tightly to save energy, reducing airflow

• New buildings have natural ventilation from gaps around doors and windows

What must the proportion of fuel gas to air be for complete combustion to take place for LPG?

• 1m³ of LPG requires 9.5m³ of air, or 1:9.5

• 1m³ of LPG requires 20m³ of air, or 1:20

• 1m³ of LPG requires 22m³ of air, or 1:22

• 1m³ of LPG requires 24m³ of air, or 1:24

Accidental air that enters a building naturally, like through gaps around doors, windows, or cracks, not from a purposely installed ventilation system is referred to as what?

• Adventitious air

• Adventurous air

• Accidental air

• Whoops air

What is the clause number from AS/NZS 5601.1 that applies to the year the building was constructed when determining the ventilation requirements for the room?

• 6.4.6

• 6.4.5

• 6.4.7

• Yes

Answer explanation

Building built/approved after 1.1.2019 when AS/NZS 5601.1 2013 was adopted. Using new sizing method.

What is the total MJ/hr loading of the gas appliances for the room?

• 65MJ/hr

• 75MJ/hr

• 80MJ/hr

• 70MJ/hr

What is the total volume of the room?

• 60 m³

• 58 m³

• 64 m³

• 65 m³

Answer explanation

5 x 5 x 2.4 = 60 m³

What indicates external air will be available for natural ventilation?

• Window

• Door

• Plan view

• The color of the wall

Using your flow charts, note pad and AS/NZS 5601, will additional ventilation openings be required for the (habitable) room?

(G = Total MJ ÷ Volume m³)

• 1.25 MJ/hr/M³
  Yes, additional ventilation openings are required.

• 0.25 MJ/hr/M³

  No, additional ventilation openings are not required.

• 3.07 MJ/hr/M³
  Yes, additional ventilation openings are required.

• 2.82 MJ/hr/M³

  No, additional ventilation openings are not required.

Answer explanation

Using the new sizing method, following the method for sizing for a room with both Open Flued (heater) and flueless (cooker) appliances not including flueless space heaters. Because this is greater than 0.4MJ/hr per m³, additional ventilation is required.