Gas Flue Systems and Ventilation

Give the BS number for the current document that gives guidance on ventilation.

What is the minimum size aperture allowed for a ventilation grill

Where an appliance is fitted into a room, a fixed allowance for adventitious openings of 35cm2 can safely be made for

If an existing air vent meets the standards and has 24 holes 5mm by 8mm its effective free area will be

List the four main parts of a conventional flue

What must be provided where a flue pipe passes through a ceiling or floor

Where 3 or more air vents are fitted in series the intermediate vents shall be increased by .....% of the calculated air requirement

Compartment ventilation is only required for open flued appliance

Ventilation air for combustion can be taken from a bathroom

All ventilators should be sleeved when fitted through a cavity wall

Ventilation grills with built in fly screen can be used with gas appliances provided they are cleaned annually

Two DFE’s fitted in a through room would normally require 200cm2 of ventilation

All calculations for ventilation are based on net kW. How is a rating converted that is given in gross kW

Incomplete combustion from the burner of which type of appliance will cause an immediate danger

A build up of dust around the injector of a gas burner is likely to cause