Hi Wennett,
Thanks for reaching out to us. Lowering the flow temperature on your gas combi boiler can have an impact on the heating performance and energy consumption of your system. Lowering the flow temperature in your radiators can improve energy efficiency by reducing heat loss and optimizing boiler performance. Modern condensing boilers are designed to operate more efficiently at lower flow temperatures, making lowering the flow temperature a trade-off between energy efficiency and comfort. Lowering the heat-up time may also increase the time it takes for the system to reach the desired temperature, but if the longer heat-up time is acceptable and you still achieve a comfortable temperature within a reasonable timeframe, it may be more energy-efficient to operate at lower flow temperatures.
Occupancy and scheduling preferences can also be considered when adjusting the schedule to account for longer heat-up time. A consistent daily routine can help ensure the desired temperature is reached without wasting energy when not present. Comfort preferences vary, so if longer heat-up time negatively impacts your comfort or causes inconvenience, consider a higher flow temperature for quicker heating. Finding the right balance between energy efficiency and comfort depends on your specific circumstances, so experimentation with different flow temperatures can help.
Let us know if that helps.
Best,
Zoe
