Nest thermostat - hysteresis value

[cholma]

Hi. Looking to move to a smart thermostat. One thing that all of them are bad at detailing is the algorithm(s) used to determine on/off. Digging around, the Drayton Wiser only allows a load compensation algorithm, that will switch the boiler on/off for short periods as it detects that the temp. is nearing the set temp.

Great if you've got a modern, condensing, boiler and a house with good insulation. Not so great if you've still got an older boiler.

Tado seems to work in a simpler on/off method, but has a hysteresis value of 0.1 - so, kicks in when the temp drops 0.1 below the set temp and turns off when it gets 0.1 above.

Hive uses load compensation as well, although you can get it switched off if you contact the useless support.

So - Nest. How does it operate? Does it dictate a load compensation algorithm, or is simple on/off selectable? If so, any idea what the hysteresis value is?

[EdwardT]

Hi cholma,

Thanks for reaching out. The Nest thermostat will wait to turn on your system until it gets to about 1ºF (0.5ºC) cooler than the temperature you’ve set. This is to prevent unnecessary wear on your system and help save energy.

You can also click on this link to learn more about this.

Thanks,

Edward

[EdwardT]

Hi cholma,

It's me again. I wanted to check back in to see if you have other questions and concerns. Feel free to let me know if you do. 

Thanks,

Edward

[EdwardT]

Hi cholma,

I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Thanks,

Edward