FLOWCYL Air Direct Slimline

Our cylinders are manufactured to the highest quality in our UK factory by the best manufacturing specialists.
Product Range

We also have a slimline version of the Flowcyl AIR for use when space is at a premium. At only 475mm width the Flowcyl AIR Slimline can be utilised in smaller cylinder cupboards or when access routes are smaller, often in older dwellings. The Flowcyl AIR Slimline also has a 25-year manufacturer’s warranty.


  • Internal expansion cylinder for faster installation and saving space.
  • Supplied with a manufacturer’s backed 25 year cylinder warranty and 2 years parts warranty.
  • Diameter is 475mm from capacities 120L to 200L.
  • Manufactured from high grade Duplex Stainless Steel.
  • Fully insulated with 50mm 100% CFC and HCFC free polyurethane to minimise heat loss.
  • Lightweight construction with high quality and 100% recyclable silver casing.
  • Supplied with high quality unvented components.
  • Supplied with a mechanical cylinder stat for simple electrical installation.
  • All plumbing connections are clearly identified with their description embossed into the cylinder case.
  • 22mm compression connections complete with nuts and olives.
  • Market leading and highly efficient primary coil which reduces reheat time and saves fuel bills.
  • Long-life 3kW Incoloy immersion heater supplied as standard.
  • Immersion heater upgrades available upon request – i.e. Titanium or 6 K/W.
  • Supplied with all safety controls as required by UK Building Regulations.


DescriptionProduct CodeNominal Capacity (L)Weight (KG)Weight full (KG)Height (mm)Diameter (mm)Immersion heater(s)kWh/ 24h (Standing Heat Loss)WATTS (Standing Heat Loss)ERP BANDERP EfficiencyERP Profile