How does eco mode work?
Eco mode will activate at the end of a heating period, if the room temperature is near the setpoint and if the algorithm predicts that the temperature will not drop to more than 1 degree below setpoint due to the heat still present in the house (for example in the walls, in radiators). In these ‘eco’ conditions the algorithm tells the boiler to turn off by lowering the current setpoint earlier than scheduled.
Note, that eco mode does not know if your boiler is on or off – all it looks at is the setpoint, current room temperature and intelligently calculated thermal properties of the house (how fast the house heats up, how long it takes for it to cool down etc). This means that eco mode can activate (icon will turn green) even when the boiler is off i.e. when the room temperature is way above setpoint.
How we calculate savings generated by Eco Mode?
To calculate savings generated by eco mode we look at the room temperature during activated eco mode – if the temperature is below, or near the setpoint, it means that the boiler would still be on if it was not for the Eco Mode, as your Wiser would keep calling for heat trying to maintain the temperature. We measure the time such situation was lasting, and calculate how much gas, in kWh, you would have used during this time, and knowing your tariff, we convert it to pounds saved.
If, however, during activated Eco Mode, the room temperature was way above setpoint, we do not count it as savings as your boiler would not have been on anyway (meaning without activated eco mode the boiler would still be off).
How we calculate savings generated by Away Mode?
With Away Mode situation is similar yet different. Away mode will set all your setpoints to your chosen values so that you don’t heat the house when you are not at home. To calculate savings generated by Away Mode, we do not simply look at the total Away Mode time, we are a more clever than this. We look at the current room temperatures and at your normal schedule (meaning the non-away mode setpoints/schedule), and if the room temperature is below your normal, non-away mode setpoint, then we say that the savings have been made thanks to Away Mode, as your boiler would otherwise turn on if it was not for Away Mode. If, however, Away Mode was on, but your temperature was above your normal, non-away mode setpoint, then your boiler would not have turned on anyway so Away Mode was not generating any savings for you in this situation and so we do not count it in.