Triple Coil Unvented

Similar in specification to the Twin Coil models our Triple Coil cylinders feature a total of three heat exchanger coils – two 1” (28mm) coils heating the upper section and a 22mm renewable coil at the bottom. 

This flexibility means that, for example, the cylinder might be heated by a solar thermal system via the renewable coil, a wood pellet boiler supplying the primary coil and a back-up oil or gas boiler on the tertiary coil.

Purchase Info
Warmflow Hot Water Cylinders, Triple Coil Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Key features

  • 1 of the top 3 performing cylinders in the UK
  • Efficient coil-in-coil design
  • Duplex Stainless Steel
  • Part L Approved
  • Seamless Welding
  • WRAS Approved
  • Twin Coil Cylinder with Renewable Coil
  • KIWA Approved
  • Recycled materials used in construction
  • Honeywell Diverter Valve

Good to know

Because we use a thicker layer of high quality polyurethane insulation our cylinder range has amongst the lowest fully certified heat loss levels currently on the market, saving precious fuel and reducing carbon dioxide emissions.

Our insulation is also CFC/HCFC-free, has a zero Ozone Depletion Potential (ODP) and a Global Warming Potential of only 2. Due to the large surface areas of our coil-in-coil heat exchangers it is also possible for a condensing boiler to work in condensing mode for longer, and cycle less frequently when heating the hot water, thereby helping to further reduce fuel use and emissions.

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Cylinder Stats

  • TR250UV (250l)
    TR300UV (300l)
  • Overall height (mm)
    1767
    2077
  • Secondary return connection (mm)
    1473
    1783
  • Primary coil upper connection (mm)
    1324
    1479
  • Primary coil lower connection (mm)
    1224
    1379
  • Tertiary coil upper connection (mm)
    928
    1083
  • Tertiary coil lower connection (mm)
    828
    983
  • Renewable coil upper connection (mm)
    532
    532
  • Cold inlet connection (mm)
    482
    482
  • Renewable coil lower connection (mm)
    432
    432
  • Cold water capactiy (litres)
    235
    285
  • Weight when full (kg)
    286
    341
  • Standing heat loss (kWh/24h)
    1.99
    2.32
  • Dedicated renewable volume (litres)
    75
    100
  • Primary coil rating @ 15/L/min (kW)
    21.3
    21.7
  • Renewable coil pressure @ 15/L/min (kW)
    20.7
    18.9
  • Tertiary coil rating @ 15/L/min (kW)
    20.1
    19.9
  • Heat up time (EN12897) (mins)
    10
    12
  • ErP Rating boiler icon

View our Cylinders range

Warmflow Hot Water Cylinders, Triple Coil Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Triple Coil Unvented

Seamless welding, duplex stainless steel, efficient coil-in-coil design - The Warmflow triple coil vented cylinder is one of the top performing cylinders in the UK.

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Warmflow Hot Water Cylinders, Twin Coil Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Twin Coil Unvented

Our Twin Coil models have all the features and benefits of the Indirect models but come with an additional coil for use with a renewable heat source, or an additional boiler.

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Warmflow Hot Water Cylinders, Eco Direct Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Eco Direct Unvented

The Eco Direct is the Twin Coil equivalent for electric hot water installations. It features two immersion heaters intended for use in the same manner as those of a Direct cylinder.

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Warmflow Hot Water Cylinders, Indirect Direct Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Indirect Unvented

Thanks to our large surface area and high performance heat exchanger coils, the indirect models.

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Warmflow Hot Water Cylinders, Direct Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Direct Unvented

The electrically heated Direct cylinders are designed for instances where the use of fossil fuels is impractical / unavailable.

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