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High efficiency condensing floor standing storage water heater

The ECOflo COMPACT is a high efficiency condensing floor standing storage water heater designed to meet your toughest installation challenges and hot water demands. The ECOflo COMPACT is available as a 20/190 litre model in Natural Gas.

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  • Features and benefits
  • Specifications
  • Literature
  • CAD
  • Energy labelling
  • Supplied with fittings pack – including draught diverter, gas cock and water drain
  • Easy installation and ready to go, straight out of the box
  • Low NOx, 22-27mg
  • Environmental benefits and future proofed against the next level of ErP changes in September 2018
  • LCD controls
  • Easy control and fault diagnostics
  • Improved gross thermal efficiency
  • More efficient use of fuel and lower running costs
  • Auto ignition as standard
  • More efficient use of fuel saving energy and costs
  • Hydrojet® sediment reduction system
  • Longer and more efficient working life

View product specification

When clicked this will open the product specification in PDF format.



Heat input (gross) kW 21.1
Heat output (gross)
kW 19
Gross thermal efficiency % 91
NOx emissions (0% 02)
mg/kWh  27.6
NOx emissions (0% 02) ppm 15.7
ErP efficiency rating    A
Noise level dBA 49.3
Gas data  
Gas flow rate (natural gas) m3/h 1.5
Gas flow rate (propane) m3/h -
Storage capacity Litre 189
Recovery rate at 50ºC rise Litre/hr 350
Recovery rate at 56ºC rise Litre/hr 297
Operating pressure (unvented) bar 3.5
Minimum working pressure at 10.3bar
bar 1
Maximum working pressure bar 10.3
Fuse rating amp 5
Electrical power consumption max/min W 300
Electrical requirements V
Weight full kg 305
Weight empty kg 124
Maximum outlet temperature
ºC 80
Connection sizes
Inlet/outlet connections
BSP 3/4
Return connection
BSP 3/4
Gas connection (gas cock supplied)
BSP 1/2
Height of heater
mm 1429
Height to vent connection
mm 1710
mm  610
Service clearance  
Front mm 600
Sides mm 300
Above mm 450
Shipping width
mm 778
Shipping depth
mm 699
Shipping height
mm 1890
Shipping weight
kg 135
Horizontal flue kit
Vertical flue kit
1 metre length flue
1m cuttable flue extension
0.5 metre flue
90º bend
45º bend
Wall terminal guard
Horizontal terminal
Weather slate angled 25º - 45º
Weather slate flat
Air cover for wall & roof terminal
Unvented system kit
Correx powered anode kit
Remote enable kit

Learn more about the ECOflo COMPACT by downloading product literature. If you can't find the literature you are looking for, or you have any questions, please contact your Area Sales Manager who will be able to help.

Download CAD files for this product using the links below. To access CAD files you will need the correct software installed to allow you to open .dwg files such as AutoCAD. If you can't find the CAD file you require, or you have any questions, please contact your Area Sales Manager who will be able to help.

The Energy Related Products Directive (ErP) has applied to all domestic and commercial heating and hot water products through Europe since September 2015.

From 26th September 2018 any water heater sold must have an efficiency/NOx output rating of C or above. In line with the new ErP legislation, we have upgraded our product range so they are all ErP compliant before the September deadline. Read more about the new product range, and legislation changes here.

ECOflo COMPACT energy labels

  • ECOflo COMPACT 20-190 NG energy label
  • FREE product training for professionals

    Meet the Next Generation water heaters
    …all now ErP compliant