EZ-Fit External Low Level / High Level Flues (Green System)

Grant EZ-Fit Green System - blackThis external version of the Grant high level and vertical flues is compatible with all Grant Vortex models. Available in a modular form, the system can cater for most installations. The flue is manufactured from a high grade stainless steel, to ensure longevity.

Plume Diverter

Grant’s plume diverter allows internal Vortex models to connect to an external high level/vertical flue arrangement, whilst maintaining the existing balanced/sealed boiler operation. Converting an existing EZ-Fit Yellow System low level flue to an external high level or vertical arrangement without any additional building work, is also straightforward, which is useful when pluming (steam) from the terminal is bothersome.

To alter a Grant Vortex outdoor module/outdoor combination module to high level or vertical conventional flue arrangement, the stainless steel starter elbow can be used. Being fully insulated and having O-ring seals and locking bands, ensures a rigid flue construction at all times.


  • Suitable for Grant Vortex boilers up to 70kW
  • Maximum vertical flue length = 8 metres
  • Maximum horizontal flue length = 4 metres
  • Supplied in modular form, enabling most installations to be accommodated
  • Short (270 – 350mm) or standard (370 – 550mm) starter kits
  • Starter kits can be extended using extensions and elbows from the low level balanced Yellow System.
  • Convert existing Yellow System low level flue to an external high level/vertical arrangement (Plume diverter)
  • Double skin extensions available in 150mm, 250mm, 450mm or 950mm fixed lengths and a 195-270mm adjustable length
  • Possible to create offsets in straight flue runs by using our 45° elbows and extensions

Case Studies

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

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

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

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