19. Ventilation PPT

• Ventilation
• Further Education (Key Stage 5)

19. Ventilation PPT

This lesson is intended to be a supplement and revision aid. 

It is to be used together with your in-class lesson notes and gas book.

Completion of this lesson adds to your Guided Learning Hours.

A ventilation brick has 80 holes each measuring 11mm by 6mm
How much ventilation does it allow in cm2

1. 52.8mm2
2. 66cm2
3. 52.8cm2
4. 66mm2

A ventilation grille has 14 slots measuring 7mm x 45mm
How much ventilation does this allow

1. 98cm2
2. 4.41cm2
3. 630cm2
4. 98.36cm2

A 6kW net open flued fire requires how much ventilation

1. None
2. 6cm2
3. 30cm2
4. 35cm2

A 20kw gross boiler requires how much ventilation?

1. 140cm2
2. 100cm2
3. 90.9cm2
4. 55.9cm2

What is the KW allowance we give for adventitious ventilation?

1. 5kw
2. 35kw
3. 7kw
4. None

Which of the following gets an allowance for adventitious ventilation

1. Room Sealed Boiler
2. Open Flued Boiler in a compartment
3. Flueless Cooker in a Kitchen
4. None of the above

A small 5kw instantaneous water heater is placed in a room measuring 4.5m3.
How much ventilation does it require

1. This is not allowed
2. 100cm2
3. 50cm2
4. Nil

A domestic oven is placed in a room of 8m3 with an openable window.
How much ventilation does it require

1. 100cm2
2. 50cm2
3. Nil
4. This is not allowed

A domestic oven is placed in a room of 10m3 with no openable window.
How much ventilation does it require

1. 100cm2
2. 50cm2
3. Nil
4. This is not allowed

Multiple Appliance Calculation

You will receive a separate lesson solely on this calculation so there are no questions here

A 9kw open flued boiler is placed in a compartment which is ventilated from external air.
What size vents should you install?

1. 180cm2 Low 90cm2 High
2. 90cm2 Low 45cm2 High

A 9kw open flued boiler is placed in a compartment which is ventilated from an internal room.
What size vents should you install

1. 180cm2 Low 90cm2 High
2. 90cm2 Low 45cm2 High

An 5kw open flued boiler in a compartment supplied with external air requires what ventilation

1. 50cm2 Low 25cm2 High
2. 100cm2 Low 50cm2 High
3. 35cm2 Low 35cm2 High
4. None - it is under 7kw

Write down 2 things you want to know more about.

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.

Ask 1 question about something you haven't quite understood yet.

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.