Bedienungsanleitung Stovax View 7 Inset High Output Boiler Inset (Seite 37 von 44) (Englisch)

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Ventilation - Technical Appendix

2. Ventilation

2.1 Many older buildings are sufficiently ventilated by natural

leakage of air to provide suitable air supply for an appliance of

5kW output or less.

Modern building techniques have reduced the amount of air

that leaks in or out of a house. A modern construction with an

air tightness of less than 5m3 per hour per m2 requires an air

vent for ALL solid fuel appliances including those with a rated

heat output of less than 5kW.

NOTE: The air leakage of a modern house is tested at the

completion of construction and a certificate issued confirming

this.

2.2 This appliance requires a constant supply of air to maintain

proper combustion and effective flue performance.

2.3 An inadequate air supply can result in poor combustion and

smoke entering the room which is potentially dangerous.

2.4 This supply of air can come from either:

— Purpose provided ventilation.

2.5 The amount of air required must comply with local building

regulations and the rules in force.

2.6 If spillage is detected during commissioning then there may

be insufficient natural ventilation and an additional air supply

will be necessary.

2.7 Permanent air vents should be non-adjustable and positioned

where they are unlikely to be become blocked.

2.8 If vents open into adjoining rooms or spaces there must be an

air vent of at least the same size direct to the outside.

2.9 Site the vents where cold draught is unlikely to cause

discomfort. This can be avoided by placing vents near ceilings

or close to the appliance (See diagram).

2.10 Extractor fans or cooker hoods must not be placed in the

same room or space as this can cause the appliance to emit

fumes into the room.

2.11 Increase air supply provisions where a room contains multiple

appliances.

2.12 If any checks reveal problems do not proceed with the

fitting of the appliance until they have been rectified.

3. Minimum Dimensions - Hearth

3.1 The appliance must stand on a non-combustible

constructional hearth which is at least 125mm thick with the

minimum dimensions as shown in diagram.

As this appliance can be installed in an elevated setting it is

recommended to increase the 225mm hearth depth to safely

contain any falling logs or embers. The higher the appliance

is installed the deeper the hearth should be to protect the

floor.

3.2 The building must have a suitable load-bearing capacity for

the hearth and appliance. Consult a structural engineer for

advice before proceeding.

3.3 When fitting into an existing hearth check that the appliance

complies with current construction regulations and is at least

the minimum sizes shown.

3.4 If there is no existing fireplace or chimney it is possible to

construct a suitable non-combustible housing and hearth

setting. The flue must be installed in accordance with all

local and national regulations and current rules in force.

3.5 Check if adding a new chimney to your property requires

planning permission.

3.6 Some houses are built using a timber frame construction

with high levels of thermal insulation. Isolate the appliance

from combustible materials, and provide sufficient ventilation

to maintain the heating efficiency.

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