Details

Typical Specs for Rezo 4.2 kW Instant Heater (e.g. Coral/42P) — what you can expect

• Rated power: 4200 W (i.e. 4.2 kW)

• Voltage: 220–240 V, 50/60 Hz 

• Built-in inverter DC pump (so it can help with water flow, useful if your household water pressure is not strong) 

• Acceptable inlet water pressure range: 9.8 kPa (min) to ~380 kPa (max) 

• Max water flow: ~8 litres/minute 

• Safety protections: Thermal cut-off (to prevent overheating) / anti-scald, plus design complying with splash-proof IP class (commonly IP25 in similar Rezo models) 

• Tankless / on-demand heating: no storage tank, so water is heated as it flows — helpful for instant showers without waiting for a storage tank to heat water.

If “CL42P” refers to such a 4.2 kW DC-pump instant heater from Rezo or similar brand, these specs give a likely ballpark of its performance.