EZ-Fit Internal High Level Balanced Flues (White System)

Grant EZ-Fit White System - High Level - blackHigh level balanced flue kits feature the same EZ-Fit boiler connections as the low level flue. The unique clamping system on the high level flue ensures easy assembly thereby reducing installation costs.

The kits may be extended horizontally and vertically. It is now possible to create offsets in standard high level flue systems by using our 45º elbows and extension kits – increasing the versatility of this new range.

The high level kits feature self sealing exhaust ducts and a quick-fit locking band connection for the air duct, which vastly reduces the time taken to complete the installation.


  • Suitable for Grant Vortex boilers up to 70kW
  • Maximum total flue length = 10 metres (deduct 1 metre for each additional 45° elbow used)
  • Flue may be extended horizontally and vertically
  • Unique connection system ensures easy assembly
  • Extensions available in 225mm, 450mm or 950mm fixed lengths and a 275-450mm adjustable length
  • Supplied as a complete kit
  • 150mm flue pipe diameter for boilers up to 26kW
  • 180mm flue diameter for boilers from 26-70kW
  • Terminal guard (not supplied) required when the flue terminates less than 2 metres
  • Possible to create offsets in straight flue runs by using our 45° elbows and extensions

Case Studies

19th century cottage now being heated by a Vortex Pro boiler

A cottage that was originally built in 1850 in a small Wiltshire village is now being kept warm by a Grant Vortex Pro 15-21kW kitchen/utility oil-fired boiler. Replacing an appliance that was over fifteen years old, the new Vortex now installed is providing reliable heating to the property, efficiently andRead More

Living with a Grant Vecta biomass boiler

Grant UK visited Mike and Sarah Hodgson who recently had a Vecta wood pellet boiler installed at their property, to discuss why they chose this renewable technology and to uncover a homeowner’s perspective of living with biomass. At the beginning of 2017, Mike and Sarah Hodgson had an internal VectaRead 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

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

Martin Roberts warms up with a Grant VortexBlue

Earlier this year, television and radio property expert and author, Martin Roberts, turned to Grant UK for a replacement oil boiler to fulfil his property’s heating needs. Martin selected a Grant VortexBlue which, with its cleaner burning technology, is now keeping his home warm and toasty for many years toRead More