Why do I need a flue for my oil boiler?

Grant Vortex condensing boilers need to be connected to a flue to remove the combustion gasses.

Even if you are replacing your Grant boiler with a new version, you will require a new flue system too. It is not possible to connect to the old existing flue or liner, due to build up of debris, which could fall back into your new boiler and affect its performance.

EZ-Fit Flue range

Grant has a range of unique EZ-Fit Flues. These are available as low level, high level or vertical kits, for internal and external applications, and even as unique EZ-Flexi liner packs, designed to enable condensing boilers to utilise an existing chimney. It is also possible to convert existing low-level flues to high level after installation.

Apart from the benefits of so many options the Grant EZ-Fit flue systems ensure ‘pluming’ is kept well out of the way of any windows, air vent or doors and out of sight.

The flue terminal (end part of flue situated externally) should be positioned so as to avoid combustion gasses accumulating in stagnant pockets around, or entering inside the property. Care should also be taken that the plume from a condensing flue does not cause a nuisance.

Individually designed conventional flue systems for modular boiler installations

We offer a unique customised design service, where two or more boilers are connected in a modular form to a single conventional flue stack. This service includes the design and supply of flue headers and flue systems for condensing boiler installations and is available to merchants upon completion of a simple site survey form. Contact our technical department on: +44 (0)1380 736920 for further details.

Case Studies

Out with the old and in with a new Grant Vortex

A three storey property in Argyll has recently upgraded its heating system with a Grant Vortex oil-fired boiler which is working alongside a Grant energy management control system, providing warmth throughout the building. Vortex oil-fired boilers are renowned for their efficiency, but the effect of energy management controls can sometimesRead More

Townsends take up renewables

Established in 1945, W.J Townsend & Son is a family run business providing domestic customers in Towcester and surrounding areas with a comprehensive range of plumbing and heating services. The business has been in the family for over 75 years with William John Townsend, founding the company. Andy his sonRead More

East Green Energy lead the way with Grant Spira

Renewable energy specialists East Green Energy are leading the way by installing an award wining Grant Spira Wood Pellet Boiler in their showroom at the Company’s Suffolk headquarters. Believed to be the only showroom in East Anglia with a fully working Wood Pellet Boiler, it is certainly generating a greatRead More