EZ-Fit Internal Low Level Balanced Flues (Yellow System)

Grant EZ-Fit Yellow SystemThe Yellow system has been developed to make the installation of Grant boilers both quick and simple, whilst ensuring trouble free operation – even in the most exposed site conditions.

The round low level kits feature self-sealing ducts requiring no silicone or tape for joints, and the unique quick-fit clamp arrangement ensures a perfect seal every time. In fact, the new telescopic flue system requires only two simple operations to complete the installation. The kits are compatible with all Grant boilers, (except Outdoor Modules) including condensing models.

The flue terminal has a compact design, making it ideal for installations where the visual appearance is important. The new cone design reduces the possibility of condensate, produced in the combustion process, staining external wall surfaces or patio slabs.

Extensions and elbows

The flue kits are telescopic and available in short or standard options. For wall thicknesses greater than shown, three extensions are available which extend the flue by 225mm, 450mm or 675mm. 90º and 45º elbows are also available to give a greater degree of flexibility when siting the boiler.


  • Suitable for Grant Vortex boilers up to 70kW
  • Maximum horizontal length = 4 metres  (including one 90° or two 45° elbows)
  • Telescopic design
  • Quick and simple to install
  • Self-sealing ducts requiring no silicone or tape
  • Supplied in short (340 – 440mm) or standard (370 – 530mm) kits
  • Extensions available in 225mm, 450mm or 675mm lengths
  • 80mm flue pipe diameter for boilers up to 26kW
  • 100mm flue diameter for boilers from 26-70kW
  • Optional plume diverter (maximum height = 6 metres)
  • Compact terminal section – ideal for installations where visual appearance is important.
  • Terminal guard included
  • External sections available in black

Case Studies

New Vortex Boiler Houses welcome two homes to the red side

Two Grant Vortex Boiler House models, with their eye-catching red case, have recently been installed at properties in Dorset, delivering reliable home heating with their iconic new look. In September this year, Grant UK launched new models to join its Vortex oil fired condensing boiler range. Six new Vortex BoilerRead More

Property developer chooses Grant Biomass for new build

With any new build, how to heat it efficiently and effectively are a designer’s high priority and this was no more evident than on a fantastic new residence in Grimsby. A large PV array was installed in the garden to provide sufficient power to the property and also take advantageRead More

Grant biomass boilers are keeping installers busy

The social media feeds of Dryad Energy Ltd have been filled with red recently – red Grant Spira biomass (wood pellet) boilers! Dryad Energy has been incredibly busy installing Spira boilers in domestic properties throughout the South with photos from these installs occupying their newsfeeds. We have been speaking toRead More

Out with the old and in with the Blue!

Since its launch last month, demand for the innovative new Grant VortexBlue oil-fired condensing boiler range has been high. Dempsey Heating Ltd, a Grant UK G-One accredited installer, was one of the first to fit the new blue flame boiler which is now keeping a home in Norfolk warm withRead More

Local Authority upgrades sheltered housing with Grant

Sheltered housing schemes in Archway Gardens and Willow Road featuring renewable products from Grant UK, have been instrumental in helping Stroud District Council (which won the prestigious 2010 Green Energy Award for being the South West’s most proactive Local Authority), with its green housing energy initiative. The award recognises theRead More