RFA-OS Flameproof Oversink Water Heaters

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The RFA-OS range of oversink water heaters offers the ideal solution for providing hot water for hand wash / hygiene use, in rest rooms and laboratories that are located in Zone 1 and Zone 2 hazardous areas, where the flammable atmosphere is a Group IIA, IIB or IIC gas.



  • Certified to ATEX and CU TR (formerly GOST) standards
  • Easy oversink installation
  • Economic hot water supply at point of use
  • Open outlet construction


Model - -
Litres 7 10
Dim A 298 371
Dim B 232 232
Dim C 237 234
Weight (Empty) 8 10
Weight (Full) 15 20


Certification ATEX II 2 G
Ex d IIC T5 to T6 Gb Zone 1 and 2
CU TR (formerly GOST)
Enclosure Cast stainless steel with one M25 cable entry, external and internal earths, and bolted terminal cover
Elements High quality 80/20 nickel chrome resistance wire compacted in magnesium oxide insulating powder and encased in an Incoloy 825 metal sheath
Controls Control thermostat adjustable up to 60°C; level switch cut out for element temperature protection
Water Tank Copper tested to 0.5 barg
Casing Corrosion proofed, stove enamelled, sheet steel
Insulation CFC free, contoured, polyurethane
Mounting Over sink
Accessories 300mm reach, stove enamelled copper spout and cold water inlet valve, supplied
Rating 2kW/240V/single phase
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