Hanwood - Manual

ManualsBrandsAga ManualsWood Burning StovesHanwood Wood Burning Stove

access for rodents. In extreme cases the placement

of the terminal on the external wall may pose prob-

lems and remedial action may be required to relo-

cate the terminal or provide two terminals on oppo-

site walls to balance the wind effect.

Where the stove is connected to outside air and

there is no draught stabiliser fitted there is no

requirement for an additional air supply, provided a

successful ‘smoke draw test’ has been carried out

as part of commissioning.

Where no outside air duct is fitted please refer to

Building Regulations Part J to determine the size of

permanent air vent required, as follows:

Install where draft stabilizer is fitted:

Permanently open vents as below:

If design air permeability >5.0m3/(h.m2) then

300mm2/kW for first 5kW of appliance rated output

850mm2/kW for balance of appliance rated output

If design air permeability <5.0m3/(h.m2) then

850mm2/kW of appliance rated output (4)

Install where no draft stabilizer is fitted:

Permanently open vents as below:

If design air permeability >5.0m3/(h.m2) then

550mm2/kW of appliance rated output above 5kW

If design air permeability <5.0m3/(h.m2) then

550mm2 per kW of appliance rated output (4)

If there is another appliance using air fitted in the

same or adjacent room, it will be necessary to pro-

vide an additional air supply.

All materials used in the manufacture of air vents

should be such that the vent is dimensionally stable,

corrosion resistant, and no provision for closure. Air

inlet grills should be positioned so they do not

become liable to blockage.

The effective free area of any vent should be ascer-

tained before installation. The effect of any grills

should be allowed for when determining the effective

free area of any vent.

Air vents direct to the outside of the building should

be located so that any air current produced will not

pass through normally occupied areas of the room.

An air vent outside the building should not be locat-

ed less than the dimensions specified within the

Building Regulations and B.S. 8303: Part 1 from any

part of any flue terminal. These air vents must also

be satisfactorily fire proofed as per Building

Regulations and B.S. 8303: Part 1.

Air vents in internal walls should not communi-

cate with bedrooms, bedsits, toilets, bathrooms

or rooms containing a shower.

Air vents traversing cavity walls should include

a continuous duct across the cavity. The duct

should be installed in such a manner as not to

impair the weather resistance of the cavity.

Joints between air vents and outside walls

should be sealed to prevent the ingress of mois-

ture. Existing air vents should be of the correct

size and unobstructed for the appliance in use.

If there is anextraction fan fitted in adjacent

rooms where this appliance is fitted, additional

air vents may be required to alleviate the possi-

bility of spillage of products of combustion from

the appliance/flue while the fan is in operation.

Refer to B.S. 8303 Part 1.

Where such an installation exists, a test for

spillage should be made with the fan or fans and

other appliances using air in operation at full

rate, (i.e. extraction fans, tumble dryers) with all

external doors and windows closed.

If spillage occurs following the above operation,

an additional air vent of sufficient size to prevent

this occurrence should be installed.

Note:- If there is any work that is being carried

out that would effect the air quality supplied to

the stove such as sanding a floor or glueing

linoleum etc. the stove must be out of operation.

The dust or vapours may be a potential hazard,

the air supply and local area needs to be thor-

oughly ventilated before putting the stove in

operation again.