John J Doyle Ltd are third generation specialists in the design, manufacture and installation of domestic, commercial and industrial modular chimneys, self-standing chimneys and support structures.  They provide expert and bespoke solutions for the extraction of products of combustion from generators, boilers, CHP units, incinerators and biomass boilers.


For over 20 years John J Doyle Ltd have been the sole distributor in Ireland for Dinak, one of Europe’s leading chimney manufacturers. As an organisation Dinak have developed and tested all their products according to the European standard EN 1856-1. All Dinak products have been tested by TÜV in Germany.


Based in Belfast but with a wild range of successfully delivered projects in Northern & Southern Ireland, mainland UK and Europe we strive to deliver on time and on budget projects for our expanding customer base.

Our product specialisation and commitment to quality are connected to our dedication to promoting standardisation in the chimney industry.  We take part in variously standardisation bodies such as the European Committee for the Standardisation of Metal Chimneys, the Spanish Association of Chimney Manufacturers (AFECH) and the European Chimney Association.


Dinak Twinwall Modular Chimmney Catelogue

Dinak Twinwall Stainless Steel Catelogue

Dinak Singlewall Stainless Steel Catelogue