Adventitious Ventilation
- natural ventilation sufficient for complete combustion of 7kW appliance
- equals to 35cm2 of ventilation
| < Go Back | 2013-03-20 |
Air Vents
- Must be permanent
- Should be non-closable
- Holes must be in between 5mm and 10mm
- the size is actual free area
- Corrosion resistant and stable
- Inner and outer grills must be connected by a liner to bridge the cavity
- Minimum separation distance between Air Vents and Flue Terminal applied
- Types of air vent
- Circular wall air vent
- Floor vent
- Door vent
- Plastic inner wall or vent
- Rectangular air vent
- Air brick
| < Go Back | 2013-03-20 |
Vents in Series
- Two vents in series
- Vent 1 (Outside vent) = Vent 2
- Three or more vents in series
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Vents for Flueless Appliances
- Must be in a room with an openable window
- Any ventilation must be directly to outside - not another room
| < Go Back | 2013-03-20 |
Vents for Open-flued Appliances
- Must be a permanent supply of air to that room
- Not allowed to fit in Shower or Bathrooms
- On range rated appliances ventilation is based on the maximum input
- In a room
- 5cm2 for each kW above 7kW
- In a compartment
- Compartment label should be fixed
- No allowance is made for adventitious air
- the door will not open into a Bedroom or Bed-sitting Room if appliance heat input is over 12.7kW net (14kW gross) or Air Sensing Device ASD is not fitted
- Maximum height is 450mm for air inlet vent from the floor level
- Air supplied from outside - 5cm2/kW (high level) and 10cm2/kW (low level)
- Air supplied from a room- 10cm2/kW (high level) and 20cm2/kW (low level)
| < Go Back | 2013-03-20 |
Vents for Room-sealed Appliances
- In a room - no vent required
- In a compartment:
- Air supplied from outside - 5cm2/kW for both at high and low level
- Air supplied from a room - 10cm2/kW for both at high and low level
| < Go Back | 2013-03-20 |
Gas Pipework Ventilation
- Ventilated Duct
- Enclosed Area
| < Go Back | 2013-03-20 |
