Twin Wall

Twin Wall Installation Guides

Twin Wall Installation Guides

Please click one of the guides below relevant to your installation.

Bungalow Internal Installation

External Installation

Internal Straight Installation

Ventilation Installation


Jeremias is a German manufacturer of DW-ECO 316 twin-wall insulated chimney systems, engineered in both Spain and in Germany. The high-temperature resistant twin-wall system they produce is made from 304 outer (0.4-0.6mm) and 316 inner (0.4-0.6mm) stainless steel. The twin-wall system is densely packed with rigid mineral wool insulation, of 25mm thickness (120kg/m3) designed to maintain the heat inside the system and create a better draw.

Jeremias twin-wall is suitable for burning all types of fuel in situations where a chimney system is needed to go either on the outside of a building or to be built inside where there is not an existing chimney stack.

Jeremias use a “push-fit” system for their rigid pipe where each component pushes into the following piece and a locking band (provided with all lengths, bends and adaptors) goes around the joint. O-rings are available for condensing purposes.

All of Jeremias products have been HETAS approved and quality tested.

Installation Guidelines

For detailed installation guidelines, please refer to the following

• Jeremias System dw-eco 316, Certification & Installing Instructions

• HETAS -Heating Equipment Testing and Approval Scheme

• NACS- National Association of Chimney Sweeps

• Document J UK Building Regulations

• Planning Office