Seldek.png

Seldek Twin Wall Chimney

The Seldek® Twin Wall chimney system is designed to meet the requirements of multi-functional applications for a variety of fuels. The system provides a high quality and robust chimney with high thermal performance and ease of installation. The Seldek chimney is suitable for negative pressure conditions where the maximum flue gas temperature does not exceed 600°C and is soot fire tested to 1000°C. When used with positive pressure application such as pellet stoves or condensing appliances the Seldek system can be fitted with seals at each joint. Seals must be ordered separately as required. The system consists of straight lengths and fittings which are constructed entirely from stainless steel and a nominal 30mm mineral wool insulated annulus. The system may be installed internally or externally and must conform to national and local building regulations. The relatively low external wall temperature permits installation with only a 50mm (2") air gap clearance to combustible materials.

Key Features

• Fully welded system

• Inner liner is 0.5mm 316 grade stainless steel

• Outer skin is 0.5mm 441 grade stainless steel

• All lengths and fittings supplied with a standard locking band

• All tees supplied with a plug which incorporates a 22mm drain point

• Available in diameters 100mm, 130mm, 150mm, 180mm and 200mm.

• Black powder coated available from stock in 150mm diameter

[ Open All | Close All ]

1] Chimney Route and Diameter:
The chimney should preferably rise vertically from the appliance to the termination outlet. However, as that is not always practical, changes of direction can be made, provided that no part of the chimney route exceeds an angle greater than 45° from the vertical. To ensure adequate performance, we recommend that any inclined sections do not exceed 20% of the total length of the chimney run. No joint between chimney sections is permitted within the thickness of a wall or floor. An exception would be where a short length and the branch of a 45° Tee connect within an external wall thickness. The use of a metal Wall Sleeve encasing the joint at this point is usually acceptable, particularly as it also eases installation and maintenance. To prevent soot or fly ash dangerously blocking a flue ways, Building regulations will not permit any part of the flue system, including a connecting flue pipe, to run horizontally for a distance greater than 150mm. Whatever the configuration, a minimum 600mm vertical rise of the flue or chimney from the appliance outlet is advised so to avoid initial draught restriction. the appliance manufacturer may also dictate minimum requirements in this respect. The chimney diameter should never be less than the diameter of the exit spigot on the the appliance. The appliance manufacturer's instructions may dictate a larger diameter.

2] Proximity to combustible materials:
A minimum air gap distance of 50mm MUST be maintained from the outside surface of the chimney to any combustible material by using the dedicated supports and components provided for the Seldek® Chimney System. The use of any additional insulation to avoid this requirement can be dangerous as the heat radiation characteristics will alter. Where passing through a cupboard or roof space, an enclosure may be constructed to surround the chimney providing there is a 50mm minimum air gap clearance to any combustible material. Building Regulations dictate that flue pipes connecting the appliance to the chimney MUST do so within the room containing the appliance. Flue pipes MUST also have their external surfaces clear of any combustible material by a minimum distance of at least three times the diameter of the flue pipe. That clearance can be halved if a heat shield is used which is at least 12mm clear of the combustible material being protected.

3] Support:
The chimney must be adequately supported and braced using the dedicated supports and components provided for the Seldek® Chimney System and applied in accordance with the instructions provided. The full weight of the chimney must be borne by these dedicated components and no weight should be taken by the appliance it serves.The use of any other support process will result in noncompliance with Building Regulations and the Seldek® Chimney's approval status.

4] Combustion Air Provision:
Building Regulations require that all combustion appliances with an output exceeding 5KW are provided with a permanent dedicated opening through which air for combustion can freely pass. It is incumbent on the chimney and appliance installer to check with current legislation to ensure that the requirements are met. Failure to provide combustion air is not only dangerous, its inadequate provision can, via the process of incomplete combustion, result in excessive soot production and subsequent operation and maintenance problems.

5] Maintenance Facilities:
Provision must be made for cleaning and maintenance of the flue pipe and the chimney. An inspection length or the insulated Tee Plug provide access as would access cover plates in connecting flue pipes.

6] Flue termination requirements for solid fuel and wood burning appliances:
The table and illustration below detail the minimum requirements for termination as required by building regulations. In each case, "termination" refers to the point at the top of the chimney flue outlet from which products of combustion are discharged from the flue. Any rain cap or other termination device is not included. It must be stressed that these are minimum discharge heights and relate to safety relative to potential human or fire hazard. The discharge requirements do not guarantee that the chimney will perform as required. There are many other factors which can have a detrimental impact on the way the chimney performs. Taller nearby structures - buildings and trees, local topography and even other operating chimneys in the same building can all influence and sometimes interfere with the way a chimney operates.

 
Deks001_78203864Pipe.jpg
 

LENGTHS

Available in 5 diameters and 4 lengths and can be combined to obtain the required installation height. Because of the socket/spigot joint and for extra strength each length has an effective length 65mm shorter than shown. All lengths are supplied with a locking band.

 

SizePart No.
100mm100CHI-L1000
100mm100CHI-L500
100mm100CHI-L250
100mm100CHI-L150
SizePart No.
130mm130CHI-L1000
130mm130CHI-L500
130mm130CHI-L250
130mm130CHI-L150
SizePart No.
150mm150CHI-L1000
150mm150CHI-L500
150mm150CHI-L250
150mm150CHI-L150
SizePart No.
180mm180CHI-L1000
180mm180CHI-L500
180mm180CHI-L250
180mm180CHI-L150
SizePart No.
200mm200CHI-L1000
200mm200CHI-L500
200mm200CHI-L250
200mm200CHI-L150

Deks010__7217650Accesspipe.jpg
 

INSPECTION LENGTH

Used to provide access for inspection or cleaning.

SizePart No.
100mm100CHI-IL
130mm130CHI-IL
150mm150CHI-IL
180mm180CHI-IL
200mm200CHI-IL

adjustable length.png

TELESCOPIC ADJUSTABLE LENGTH

The adjustable length is designed to provide adjustment between two fixed points. The length will adjust from 370mm-500mm. Required adjustment is achieved by carefully removing the excess insulation and securing with self tapping screws. This component is not load bearing and due to onsite adjustment of the insulation it should be installed 300mm from combustibles.

SizePart No.
100mm100CHI-AL
130mm130CHI-AL
150mm150CHI-AL
180mm180CHI-AL
200mm200CHI-AL

Deks030__7217718collar.jpg

STANDARD LOCKING BAND

Standard locking bands are used to join lengths and fittings together and must be used.

A standard locking band is supplied with all insulated lengths, tees and elbows.

SizePart No.
100mm100CHI-LB
130mm130CHI-LB
150mm150CHI-LB
180mm180CHI-LB
200mm200CHI-LB

Deks029__7217715collar.jpg

WIDE LOCKING BAND

The wide locking band can be used when an unsupported length of up to 3 metres is required provided that there are no elbows or other fittings in the final 3 metres of the chimney and that there is a minimum of 3 metres beneath the final support.

SizePart No.
100mm100CHI-WLB
130mm130CHI-WLB
150mm150CHI-WLB
180mm180CHI-WLB
200mm200CHI-WLB

Deks005_7217820Junction45.JPG

135° INSULATED TEE & PLUG

The 135° Tee is used at the base of a vertical chimney. Each tee is supplied with a standard locking band and a tee plug. Each plug is fitted with a 22mm drain point as standard.

SizePart No.
100mm100CHI-T135
130mm130CHI-T135
150mm150CHI-T135
180mm180CHI-T135
200mm200CHI-T135
Deks013__7217679plug.jpg

Deks006__7217664TJunction.jpg

90° INSULATED TEE & PLUG

The 90° allows a horizontal connection of the chimney to the appliance. The tee plug provided allows for inspection and cleaning and is supplied with a 22mm drain point as standard.

SizePart No.
100mm100CHI-T90
130mm130CHI-T90
150mm150CHI-T90
180mm180CHI-T90
200mm200CHI-T90

39.JPG

INSULATED TEE PLUG

The insulated Tee Plug allows access for inspection and cleaning.


Deks031__7217723bracketshelves.jpg
Deks011__7217657bracketpipe.jpg

ADJUSTABLE WALL SUPPORT

The adjustable wall support will allow for an adjustment from 50-150mm from a vertical wall. It may be used at the base of a system or anywhere throughout its length where a support is required. Two stainless steel angled brackets are supplied with the wall support and a total effective length of 160mm is incorporated into the support, top and bottom.

wall support chi.PNG
 

Roof support.png

ROOF SUPPORT

The roof support allows the chimney to be supported on roof joists, trussed rafters etc. The support is supplied with self tapping screws to secure to the outside skin of the chimney.

SizePart No.
100mm100CHI-RS
130mm130CHI-RS
150mm150CHI-RS
180mm180CHI-RS
200mm200CHI-RS
 

anchor plate.png

ANCHOR PLATE

The anchor plate is usually used for adapting the Seldek® Twin Wall System to 'brick built chimney'. Flexible flue liner can be attached to the single skin tail of the anchor plate.

SizePart No.
100mm100CHI-AP
130mm130CHI-AP
150mm150CHI-AP
180mm180CHI-AP
200mm200CHI-AP

Deks024_BracketsSet.jpg

WALL BANDS

The all stainless steel wall bands are used to provide lateral support where required. The bands will adjust to extend the distance between the chimney and wall surface. Wall bands must be installed every 3 metres

 

Screenshot 2018-08-19 17.36.49.png
   No. 0 Wall Band 
SizePart No.
100mm-50100CHI-WB0
130mm-50130CHI-WB0
150mm-50150CHI-WB0
180mm-50180CHI-WB0
200mm-50200CHI-WB0
No. 1 Wall Band 
SizePart No.
100mm-65-105100CHI-WB1
130mm-96-129130CHI-WB1
150mm-88-122150CHI-WB1
180mm-82-115180CHI-WB1
200mm-77-112200CHI-WB1
No. 2 Wall Band 
SizePart No.
100mm-165-245100CHI-WB2
130mm-121-168130CHI-WB2
150mm-115-162150CHI-WB2
180mm-108-155180CHI-WB2
200mm-103-150200CHI-WB2

Deks009__7217627Bend45.jpg

ELBOW

Elbows are available in either 15°, 30° or 45° angles. They are secured to lengths or other fittings with the locking band provided.

15° Elbows 
SizePart No.
100mm100CHI-E15
130mm130CHI-E15
150mm150CHI-E15
180mm180CHI-E15
200mm200CHI-E15
30° Elbows 
SizePart No.
100mm100CHI-E30
130mm130CHI-E30
150mm150CHI-E30
180mm180CHI-E30
200mm200CHI-E30
45° Elbows 
SizePart No.
100mm100CHI-E45
130mm130CHI-E45
150mm150CHI-E45
180mm180CHI-E45
200mm200CHI-E45

08.JPG

FIRESTOP SPACER

Used on oil or gas installations where declared flue gas temperatures do not exceed 250°C and where the chimney passes through a combustible floor.

firestop.PNG
 

ventilated firestop.png

VENTILATED FIRESTOP SPACER

Used where the chimney passes through a combustible ceiling and floor and flue gas temperatures are above 250°C typically with solid fuel or oil. This is not a load bearing component.

vfs.PNG
 

Deks014__7217685cowl.jpg

RAIN CAP

Secured with Locking Band (not supplied).

rc.PNG
 

DADTS-01.png

DAD COWL

This cowl is streamlined and compact, it harnesses the airflow around the chimney to produce a positive upward draught. It connects to a Seldek Twin-Wall chimney with use of a Locking Band (not supplied). Powder coated silver.

(Also available in black - code number DADB)

Screenshot 2018-08-19 18.31.39.png
dadsb.PNG
 

Deks018__7217695cowl.jpg
DC.PNG

DEFLECTOR COWL

This cowl is suitable for use in exposed locations and improves resistance to rain ingress. For use on solid fuel or oil applications.


Deks017__7217692adaptor.jpg
EC.PNG

End Cap

The end cap may be used to close the end of the chimney where the insulation is exposed. for example where a single skin termination such as a vidette cowl is required.


09.JPG

Storm Collar

The Storm Collar is designed to fit around the chimney pipe just above the upstand of a standard roof flashing. The upper edge of the Storm Collar should be waterproofed with non-hardening silicone caulking to prevent any water from leaking between the Storm Collar and chimney pipe.

NOTE: Storm Collar is not required with Seldek flashings.

storm collar.PNG
 

69.JPG

Roof Brace Kit

A Roof Brace Kit can be used whenever there is a need to stabilise the chimney above the roof level. The roof brace kit must be used if the chimney extends 1.5 + metres above the roof. The arms can be adjusted from 1.5 metres to 2.9 metres in length.

rbk.PNG
 

Adaptor.png

Adaptor

Used as a vertical or horizontal connection between chimney lengths and connector pipes or to connect directly to the appliance.

SizePart No.
100mm100CHI-A
130mm130CHI-A
150mm150CHI-A
180mm180CHI-A
200mm200CHI-A
adaptor.PNG
 

_Increasing adaptor seldek.jpg

Increasing Adaptor

Used to adapt from a small outlet to larger twin wall system.

80-130.PNG
100-130.PNG
125-150.PNG
150-180.PNG
180-200.PNG

Ceiling support seldek.jpg

CEILING SUPPORT

The ceiling support MUST be used whenever the weight of the Seldek® system is to be taken at ceiling level. The component incorporates a radiation shield and is used where the chimney passes through a combustible floor. The round solid firestop is supplied detached from the bottom section of the joist shield. It should be adhered to it prior to installation with a ‘high grab’ metal adhesive such as Geocel xxx.Please refer to page 8 for detailed instructions.

SizePart No.
100mm100CHI-CS
130mm130CHI-CS
150mm150CHI-CS
180mm180CHI-CS
200mm200CHI-CS

VENTILATED CEILING SUPPORT

Used as a support and a firestop and must be used where the weight of the chimney is to be taken at ceiling level.

SizePart No.
100mm100CHI-VCS
130mm130CHI-VCS
150mm150CHI-VCS
180mm180CHI-VCS
200mm200CHI-VCS

14.jpg

Trim Plates

Used as a cosmetic cover plate where the chimney penetrates a sloped wall or ceiling available in flat, 20°, 30° or 45° angles.

tp.PNG
 

10.JPG

Wall Sleeve

Used to allow chimney to pass through a cavity wall.

wall sleeves.JPG
ws.PNG
 

Deks016__7217688adaptor.jpg

Adaptor to Flexible Liner

Used where Seldek® connects an appliance to an existing chimney that needs to be lined.

 

seals.png
seal.PNG

SEALS

Should be used on pellet and condensing appliances.