Questions Flashcards
What is the minimum cross section area of a pre cast flue?
16.500 mm2 squared
What is the minimum cross section area of a brick built chimney?
12,000 mm squared
What is the air-gap between two walls on a flue?
25mm
How does a room sealed balanced flue work ?
It takes the air from outside as well and same amount of hot air and cold air natural movements of air
What is the minimum distance from the flue spigot to the hearth on a normal gas fire?
250mm
In order what are the 4 parts of a open flue ?
- Primary flue
- Draught diverter
- Secondary flue
- Terminal flue
What is the maximum changing direction allowed on a pre cast flue?
30 degrees
What is the diameter of the flue where a terminal is not required ?
170mm
What’s the maximum change direction on a metal flue ?
45 degrees
Working out how to convert Gross to Net is ?
Divided by 1.11
If I’m venting open flue appliances over 2 or more walls how much do I increase ?
50%
How much air do I get from advantages air ?
35cm squared
How much cm squared air do you need per KV ?
5cm squared
What size does the holes have to be for a vent grill ?
5-10 mm
Any internal vents fitted ..
what is the maximum height fitted ?
450mm
