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, but also has an indirectly heated coil for use with a renewable resource, such as a solar thermal system. 

The models feature dedicated renewable volumes and large surface area coils to maximise the use of available low grade heat from a renewable resource. By combining the use of renewable energy with the Economy 7 tariff, the Eco Direct models offer improved affordability where the use of fossil fuels is impractical / unavailable.

Purchase Info
Warmflow Hot Water Cylinders, Eco Direct 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
  • 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

  • ED210UV (210l)
    ED250UV (250l)
    ED300UV (300l)
  • Overall height (mm)
    1517
    1767
    2077
  • Secondary return connection (mm)
    1573
    1473
    1783
  • Upper immersion (mm)
    1078
    1230
    1540
  • Lower immersion (mm)
    752
    752
    1062
  • Renewable coil upper connection (mm)
    532
    532
    532
  • Cold inlet connection (mm)
    482
    482
    482
  • Renewable coil lower connection (mm)
    432
    432
    432
  • Cold water capacity (litres)
    205
    245
    295
  • Weight when full (kg)
    243
    286
    341
  • Standing heat loss (kWh/24h)
    1.74
    1.99
    2.32
  • Dedicated renewable volume (litres)
    100
    100
    150
  • Renewable coil rating @ 15/L/min (kW)
    19.9
    22.2
    20.4
  • Heat up time by lower immersion (mins)
    115
    157
    157
  • Heat up time by upper immersion (mins)
    63
    79
    79
  • ErP Rating boiler icon

View our Cylinders range

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