Temperature Mode: Heater will maintain set temperature by reducing the heating power, without shutting off the combustion process
Power Mode: Heater will operate constantly at set power level
Heat + Ventilation: Heater will operate till the temperature is reached 1C above the set temperature, shut off the combustion process and start to ventilate till the temperature drops 5C below the set temperature. When temperature drops, heating starts again
Thermostat Mode: Heater will operate till the specified temperature is reached then shuts off the combustion process and ventilation. After the temperature drops by specified degrees heating will start again
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