Concentric Chimneys

INOX COAXIAL JJ

Condensing

Oil

Gás

Pellets

25 year

warranty

High-performance metal concentric chimneys

The JJ range is a concentric chimney system in which an inner duct carries away the flue gases and an outer duct draws in the fresh air required for combustion. It is ideal for sealed boilers or gas heaters.

It is very easy to install and connect, energy-efficient (maintaining combustion without heat loss) and particularly useful in positive pressure systems: it ensures external air intake without disrupting internal circulation.

Description:

AISI 316L stainless-steel inner wall and AISI 304 outer wall. Uninsulated. Indoor installation.

Uses:

Sealed gas or oil boilers in single-family homes, small residential buildings or commercial premises. High energy-efficient installations where a sealed flue system is required,, such as low-energy homes (Passive Houses or Passivhaus).

Applications:

For flue gas discharge and air intake in boilers under positive pressure up to 5,000 Pa (type H1), operating in dry or wet conditions (condensing) and using oil, gas or solid fuels (wood, pellets, etc.).

Designation:

With gasket: EN 1856-1 T200-H1-W-Vm-L50040-O (50)

Without gasket: EN 14989-2 T450-N1-W-Vm-L50040-G (100)

Distance from combustible materials:

For gas and oil = 50 mm

For solid fuels = 100 mm

View installation diagram

CE and EI30 certificates

Catalogue

Installation instructions

Declaration of performance

If you can’t find what you’re looking for, contact us

Scroll to Top