©
EUROHEAT
DISTRIBUTORS (H.B.S) LTD. March 2006
Technical Guide IN1087 Edition C
1
The Flue Guide
3
. %7
Conventional Flue Systems
IN1087 Edition D
Страница 1: ...EUROHEAT DISTRIBUTORS H B S LTD March 2006 Technical Guide IN1087 Edition C 1 The Flue Guide 3 7 Conventional Flue Systems IN1087 Edition D...
Страница 2: ...125 mm to 6 or 150 mm is an increase of 44 5 or 125 mm to 7 or 175 mm is an increase of 228 6 or 150 mm to 7 or 175 mm is an increase of 38 5 Pipe Diameter Cross sectional area 4 or 100 mm 11 7 sq or...
Страница 3: ...e IN1087 Edition C Flue Flue liner Thermal insulation Outer wall Chimney section Cladding Chimney fitting Connecting flue pipe Heating appliance Chimney Multi wall CHIMNEY TERMINOLOGY Not identified i...
Страница 4: ...DISTRIBUTORS H B S LTD March 2006 Technical Guide IN1087 Edition C Conventional Gas Flue Installation A B C A Twin wall insulation internal to property B Top flue routed externally C Rear flue routed...
Страница 5: ...EUROHEAT DISTRIBUTORS H B S LTD March 2006 Technical Guide IN1087 Edition C Chimney Construction...
Страница 6: ...tly the flow induced by the difference in temperature between the gases within the flue and that of the air outside the flue and secondly the flow of wind around the property and the flue termination...
Страница 7: ...he lime mortar This will be worse where the flue has been for a range or oven which take out more heat from the fire If the fire has been primarily fueled with wood the creosote and resinous tars may...
Страница 8: ...used by multiple flues and differences in flue heights and again the effects will become evident even before any fire is lit All the flues will tend to aspirate as in the previous example but with inc...
Страница 9: ...s across the flue terminal it induces flue draught which if we are to maintain a quantifiable air supply to our stove it needs to be controlled If wind caused an air stream which was consistent in all...
Страница 10: ...d not only is the depth of high pressure far deeper than has been presupposed the turbulence and pockets of varying pressures are more unpredictable Again the following drawings are simplistic but the...
Страница 11: ...every builder liked working at high altitudes Ask about smoking fires and try to relate the problem with wind direction and features which may cause turbulence over an area rather than just the proper...
Страница 12: ...be set to limit the negative pressure at any point below the stoves maximum rate the flue will probably be unable to achieve pressure required for the maximum rate If the flue induces too much negativ...
Страница 13: ...Before dismissing the simple rain cap cowl it must be remembered that we have given no consideration to effects the house itself will have on the wind direction and those together with other pressure...
Страница 14: ...ing the diameter of the box to prevent this will only increase the negative pressures generated at the downwind side Another solution to the problem of varying wind speed is to direct air passing over...
Страница 15: ...ly the differing sizes and shapes of the dishes means that their influence will not remain consistent with each for all wind speeds and all directions No cowl will solve all problems and no cowl will...
Страница 16: ...mn water that the pressure will support A water filled manometer is a graduated tube of water and is used to measure gas pressure by directly connecting its vertical column of water to a pressure test...
Страница 17: ...hand scale is read If the inlet is closed and the inlet is through the restricted orifice the right hand scale is used 02 01 03 04 05 06 07 08 09 IN OF WATER DRAFT OR PRESSUR E LOW RANGE IN OF WATER D...
Страница 18: ...this has to be weighed against the heat losses from the larger diameters A complex flue may look impressive but its performance will be disappointing It will not give the performance of the taller ve...
Страница 19: ...liner support collar Weatherproof chimney capping and pot Sound chimney brick work Stainless steel liner Flexible to single wall adapter Register plate preventing the escape of heat positioned as low...
Страница 20: ...dition C 17 MGOOIFIG65 X X Access for cleaning minimum horizontal path With no flue liner fitted and positioned on an unstable hearth makes sealing the flue reliably in this sort of installation impos...
Страница 21: ...least 2300mm Outlets should be above the shaded areas Area Location of flue outlet A at least 1800 mm vertically above the weather surface and at least 600 mm above the ridge B at least 1800 mm vertic...
Страница 22: ...ormance class of at least FB4 N2 Flue block chimneys should be installed with sealed joints in accordance with the flue block manufacturer s installation instructions Where bends or offsets are requir...
Страница 23: ...would be to follow the guidance in the enclosed table Where a flue pipe or chimney penetrates a fire compartment wall or floor it must not breach the fire separation requirements of Approved Document...
Страница 24: ...heck Is there safe and adequate access to the chimney Can the cowl be fitted with out the need for scaffolding or lifting equipment bearing in mind current health and safety regulations Is there a sui...
Страница 25: ...er extend to the top of the chimney pot If the liner terminates at the base of the pot the cowl may not perform as it is designed to do due to turbulance formed inside the pot If the liner is fitted c...
Страница 26: ...other obstructions Please refer to the manufacturers instructions regarding the assembly and correct fitting of the cowl Most cowls have been designed to be fitted to a pot and not directly onto a fl...
Страница 27: ...and locking bands available as an optional extra Finally having fitted your cowl carry out necessary checks to ascertain that the appliance is working correctly Re commission the appliance if this is...
Страница 28: ...on a rear exit 6 Avoid long external runs 7 The warmer the flue the better it works 8 Terminate above the ridge 1 metre is ideal where possible 9 Fit the correct terminal and as per the manufacturers...
Страница 29: ...ment X This is an unsatisfactory flue firstly because the termination is too close to the roof ridge which will subject it to turbulence and secondly because it has no easy access for cleaning and the...
Страница 30: ...ely vertical aspect with no bends no horizontal runs and protected from damage Particular attention must be payed to any building regulations which may be applicable and you must be aware of any restr...
Страница 31: ...motivation During the very changeable whether conditions of Spring and Autumn the outside temperature can rise suddenly and become warmer than the temperature within the house This causes the air wit...
Страница 32: ...l If lighting the stove under these conditions proves to be more than an infrequent irritation you might like to consider purchasing a flue heater band which is permanently attached to the flue pipe a...
Страница 33: ...pressure drop within the property The converse is also true as the relationship of the openings to the wind direction are reversed Various attempts to cancel the effects of the winds effects upon air...
Страница 34: ...e of the vent is dangerous and must not be done Although the ideal position for the air vent inlet is as close to the stove as possible to minimise cold draughts in the room care must be taken to ensu...
Страница 35: ...EUROHEAT DISTRIBUTORS H B S LTD March 2006 Technical Guide IN1087 Edition C 32 Notes...
Страница 36: ...Distributors H B S Ltd Unit 2 Court Farm Business Park Bishops Frome Worcestershire WR6 5AY Telephone 01885 491100 info euroheat co uk www euroheat co uk Euroheat are suppliers are the Harmony Stanfor...
