Deltavent twin-wall flue systems

Deltavent is A1 Flue Systems’ unique twin-wall flue system that is used in installations where the reduction of heat transfer from the hot omission gases inside a flue to the external environment is required.
This double-lined ducting is available as Deltavent 25 (with a 25mm insulating gap) or Deltavent 50 (with 50mm mineral wool insulation). There are also 75mm and 100mm annuli available on request.
Deltavent twin-wall flue systems are designed for use where:
Application examples include:
The complete range of A1 Flue Systems’ Deltavent twin-wall chimney products has
been successfully tested in accordance with B5476 Part 20 for stability and integrity during a four-hour fire test. They have also been CE Marked in accordance with British Standard (BS) 1856.
For technical help on Deltavent twin-wall flue systems, download our product brochure. You can also either email our Technical Department at [email protected] or call 01623 867303.