Technical data

STRATA2

4.4 ventilation requirements

Detailed recommendations for air supply are given in BS 6644:1991. The following notes are for general

guidance. If the combustion air is to be taken from the room in which the unit is located, a guard must be

placed over the air intake to prevent the entry of any foreign bodies.

Room Sealed Installations Only:

If the boiler is to be installed in a cupboard or compartment, permanent air vents may be required for

cooling purposes in the cupboard or compartment. It is essential to ensure that the minimum clearances as

stated in figure 3.2b are maintained.

Water must not be allowed to enter the air intake, as this may affect the performance and behaviour

of the combustion fans.

Dimension Terminal Balanced Flue Non room

Position Room Sealed Sealed

A Directly below an opening, 300mm 300mm

air brick, window etc Not recommended Not recommended

B Below gutters, soil pipes or drain pipes 75mm 75mm

C Below eaves 200mm 200mm

D Below balconies or 200mm 200mm

carport roof Not recommended Not recommended

E From a vertical drain pipe or soil pipe 75mm 75mm

F From an internal or external corner 300mm 200mm

G Above ground, intersecting roof or balcony level 300mm 300mm

H From a surface facing the terminal 2000mm 2000mm

I From a terminal facing the terminal 2000mm 2000mm

J From an opening in the carport 1200mm 1200mm

e.g. door into dwelling Not recommended Not recommended

K Vertically from a terminal on the same wall 1500mm 1500mm

L Horizontally from a terminal on the same wall 300mm 300mm

M From the wall on which the terminal is mounted N/A 50mm

N From a vertical structure on the roof 500mm N/A

P Above intersection with roof 500mm 150mm

4.3 flue options & terminal position (contd)

Table 4