A spokesperson said: "Turning the thermostat up higher does not make your home warm up any quicker." Really?

[ericmark]

I found turning the thermostat (TRV) to 20°C at 7 am, would not get the room to 20°C until around 10:30 am, but set it to 22°C at 7 am then 20°C at 8 am and the room would be at 20°C at 8 am and stay there, as the anti-hysteresis software built into the TRV head (Energenie) was simply OTT.

The way to speed up heating a room, is to heat that room first, but the delay room to room can cause the boiler to modulate, so not a guarantee it will work.

 

[jj4091]

Our new Honeywell room stat works in a similar fashion. If I remember correctly it's something to do with the smart function keeping you comfortable. I presume it's so that you get used to the rise in temp. gradually. Having said that I leave the heating on 24/7 and just turn it down to 16 at bedtime so perhaps that plays a part. It seems to be always comfortable so I've never questioned how it works.

 

[Johntheo5]

I found turning the thermostat (TRV) to 20°C at 7 am, would not get the room to 20°C until around 10:30 am, but set it to 22°C at 7 am then 20°C at 8 am and the room would be at 20°C at 8 am and stay there, as the anti-hysteresis software built into the TRV head (Energenie) was simply OTT.

The way to speed up heating a room, is to heat that room first, but the delay room to room can cause the boiler to modulate, so not a guarantee it will work.

Can't really comment on the "smart" type but it certainly makes a difference on the simple TRV because even with a cold room the valve opening is less at 20C than at 22C, despite EPH, below, stating otherwise.

I presume the Energenie or likewise, being smart, start thottling down the flowrate to avoid overshooting the target temp even on the first boiler firing in the morning, it probably has some form of TPI function, it would be interesting to see if the time taken to rise to say 17C is the same for both settings,

 

[MilindPuri]

I have a digistat thermostat, it modulates the boiler firing up and down as the target nears to stop it from overshooting, so yes it takes longer to get to the target in very cold weather.

 

[Mister Banks]

I have experienced that with these types of smart thermostats that setting the setback temp no more than 2c below set temp is more comfortable and ensures a reasonable heat up time.