De Marinis DESIGN SDET telescopic element for wood stove flue systems

The De Marinis DESIGN SDET telescopic element is a component of the DESIGN flue system designed to adjust and compensate the length of the flue connection for wood-burning stoves, fireplaces and biomass appliances.

It is manufactured from 2 mm carbon steel with a matt black high-temperature finish. Its robust construction and clean appearance make the DESIGN range particularly suitable for visible indoor installations.

The SDET element is inserted into the compatible component specified by the system, allowing the flue connection length to be adjusted more accurately where standard fixed-length elements do not exactly match the required installation dimension.

It is available in nominal diameters Ø 120, 130, 140, 150, 160, 180 and 200 mm.

Main features

• Manufacturer: De Marinis
• Range: DESIGN
• Product family code: SDET
• Product type: telescopic element
• Function: adjustment and compensation of flue connection length
• Material: carbon steel
• Steel thickness: 2 mm
• Finish: matt black
• Application: flue systems for wood-burning stoves, fireplaces and biomass appliances
• Available diameters: Ø 120, 130, 140, 150, 160, 180 and 200 mm
• Temperature class: T600
• Marking: CE
• Reference standard: EN 1856-2:2009

What the DESIGN SDET telescopic element is used for

The SDET element is used when the length of a flue connection needs to be adjusted accurately and standard fixed-length pipe sections do not exactly match the required distance.

Its telescopic function helps compensate dimensional differences between the appliance flue outlet and the connection point to the other components of the system.

It is particularly useful during installation where the actual distance to be covered does not correspond exactly to the standard available pipe lengths.

Before purchasing, select the correct diameter and ensure compatibility with the other DESIGN components used in the installation.

Telescopic function

The SDET element is designed to work in combination with the appropriate DESIGN system components, allowing the useful length of the flue connection to be adjusted.

The adjustment must maintain the correct insertion depth between the components and comply with the dimensional requirements of the system.

The final configuration must ensure mechanical stability, continuity of the connection and correct evacuation of combustion products.

Technical data and classification

The component belongs to the DESIGN system manufactured in accordance with EN 1856-2:2009 and is designed for high-temperature biomass applications.

• Temperature class: T600
• Pressure class: N1
• Condensate resistance: D
• Corrosion resistance class: VM
• Material: 2 mm carbon steel

De Marinis dimensions and product codes

The table below identifies the available SDET telescopic element variants. All dimensions are expressed in millimetres.

Øn indicates the nominal diameter, while Hu and I correspond to the dimensions shown in the technical drawing included on the product page.

Technical note: for the SDET telescopic element, Hu is 270 mm and I is 55 mm. Please refer to the technical drawing included on the product page to check the insertion dimensions and installation configuration.

How to read the technical drawing

The technical drawing included on the product page allows the main dimensions of the telescopic element to be checked before ordering.

• Øn: nominal diameter
• Hu: useful element dimension, 270 mm
• I: insertion dimension, 55 mm
• Telescopic function: allows the flue connection length to be adjusted

Comparing the technical drawing, dimensional table and selected diameter helps identify the exact De Marinis product code required for the installation.

DESIGN system compatibility

For correct dimensional continuity and system configuration, the use of De Marinis components from the same range and with the same nominal diameter is recommended.

The telescopic element must be used only according to the DESIGN system specifications and with dimensionally compatible components.

Installation

Diameter, telescopic element position, insertion depth and total flue connection length must be determined according to the appliance, flue system and applicable regulations.

The DESIGN system is intended for indoor installation. Installation must be carried out by qualified personnel in accordance with the appliance manufacturer's instructions and applicable technical requirements.