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Stelflow Stainless Steel Unvented Cylinder

The RM Cylinder's Stelflow Unvented Hot Water Cylinder has been carefully constructed using high quality components and designed with performance in mind. RM Cylinders has used its experience, acquired from many years in the hot water cylinder industry, to develop an efficient and high performance Unvented Stainless Steel Hot Water Cylinder for domestic uses.

The Stelflow Unvented Cylinder Offers the Following Advantages: 

  • Full range of slim units available, from 60 Litre to 210 Litre, featuring a diameter of only 475mm. This is one of the slimmest on the market and perfect for situations were space saving is important, 
  • Full range of Stelflow horizontal direct and indirect units, 
  • Coil-in-coil heat exchanger offering efficient heating and recovery rates, 
  • External expansion vessel for reliability and flexible siting, 
  • Full WRAS product approval, 
  • Vessel constructed from Duplex Stainless Steel, 
  • Superior insulation values with an ODP of 0 and GWP of 1, 
  • Comprehensive controls and fixing kit from leading manufacturers.
Stelflow Unvented Cylinders offer peace of mind with the following guarantees: 
  • 25 year vessel guarantee/5 years on large unvented units 
  • Integral stainless steel thermostat pocket guaranteed against corrosion 
  • All other cylinder components guaranteed for 2 years 
  • All units are pickled to ensure longer life