Twin wall insulated chimney system

THERMINOX is a high quality stainless steel twin wall pre-insulated “system chimney” for all heating appliances. It is CE marked and designated as suitable for use with all gas, oil, pellet and wood burning appliances, whether these are atmospheric, pressure-jet, or fully condensing.

A continuously welded liner provides a pressure and moisture resistant system when used with the optional Joint Seal, for applications requiring pressure tightness up to 200 Pa.  

It is available in 13 diameters (from Ø80 up to Ø600mm).







Product details

>Optimisation: High thermal performance ensures maximum efficiency of chimney operation and minimum use of space in the building with rapid stabilisation of flue gas temperatures to optimise chimney operation.

> Performance: CE marked BSEN 1856-1 and 4 hour fire rating to BS476.

Safety: Exceptionally strong joints only require brackets at 4 metres intervals, with up to 16 metres on a base support with up to 3 metres free-standing capability.

> Installation: easy to install : Simple push fit joints secured with quick action toggle clip Locking Band, wide range of quality engineered support components with exceptional ability to adjust to suit the building fabric.

> Innovation: Perfect adaptor solutions to all appliance outlets and types, providing a correct sealed connection.

> Aesthetic: Exceptionally good looking chimney with recessed locking bands integrated support bracketry plus excellent flashing/weather plate arrangements, to suit all roof types.





All of the products offered by Cheminées Poujoulat have been rigorously tested in every configuration by the CERIC Laboratory to ensure they meet highest standards (Building Regulation Document J - Amendments to Approved Documents).


Technical data

> Max. Temperature limitation: 450°C
> CE marking: 0071-CPR-0011
> Insulation: 30mm high density pressure injected mineral wool (25mm for Ø100mm).

Ø80 to Ø300 T450 N1 W V2 L50 040 G50 T250 N1 W V2 L50 040 O20 T200 P1 W V2 L50 040 O20*(with joint seals
Ø350 to Ø450 T450 N1 W V2 L50 050 G75 T250 N1 W V2 L50 050 O30 T200 P1 W V2 L50 050 O30* (with joint seals
Ø500 T450 N1 W V2 L50 050 G100 T250 N1 W V2 L50 050 O40 T200 P1 W V2 L50 050 O40*(with joint seals
Ø600 T450 N1 W V2 L50 060 G100 T250 N1 W V2 L50 060 O40 T200 P1 W V2 L50 060 O40*(with joint seals

Installation & regulation



We develop the product and apply it to your project.

We provide a full thermal and structural design, with working drawings, fully compliant to British and European Standards.

We produce Clean Air Act calculations and ADMS4 dispersion modelling.

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