The Koller 953-2E inline heater heats water in hot tubs and wellness applications and stands out for its reliability and long service life. The plastic housing reduces maintenance requirements.
The model is equipped with a safety and an adjustable thermostat and a flow switch. The universal voltage range of 220–240 V requires specifying the corresponding output range. The delivery includes 2 couplings Ø 50 mm (858).
Technical parameters
- Mains voltage: 220–240 V, 50/60 Hz
- Total output: 1700–2100 W
- Protection rating: IP X5
- Total length: 217 mm (without couplings)
- Cable length: 2 m with terminals (supply line) + 2 m with terminals (control line)
- Variant: safety and adjustable thermostat, flow switch
- Weight: 1.3 kg
- Housing: plastic
- Included in delivery: 2 couplings Ø 50 mm (858)





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