Google Nest E

[HomerJay99]

I’ve finally taken the plunge and bought a Nest E which I’ll install myself to replace my 150 year old Honeywell CM51 thermostat (2 wire). It all seems straightforward but I’m a little confused about exactly which temperature sensor is used in determining the current room temperature. It seems that both the Heatlink E (the bit that goes on the wall and replaces the thermostat) and the Nest E (the thing on the stand) have temperature sensors.

Which one takes the reading that’s used to trigger the heating?

 

[ianmcd]

The heatlink, the bit that replaces your two wired thermostat does not sense any temperature , it is a switch that "the bit on the stand" tells when it wants it to fire your boiler

 

[HomerJay99]

If you scroll down to Heat Link E, you’ll see that the Heat Link also has a temperature sensor. I’ve seen this also mentioned in a few reviews on YT!
https://store.google.com/gb/product/nest_thermostat_e_specs?hl=en-GB

 

[Deleted member 267285]

Have a look here: https://www.pocket-lint.com/smart-home/reviews/nest/145870-nest-thermostat-e-review

It does appear the heatlink has a sensor.

 

[HomerJay99]

Just had a conversation with Nest support:

“The temperature sensors from the Heat Link E are an experimental feature and would be used in the development of future features and products, but don't currently serve a purpose. The Thermostat measures the ambient temperature using its own temperature sensors, which are used to help the thermostat stop heating when the target temperature is set to help you save energy.”

 

[ianmcd]

Just had a conversation with Nest support:

“The temperature sensors from the Heat Link E are an experimental feature and would be used in the development of future features and products, but don't currently serve a purpose. The Thermostat measures the ambient temperature using its own temperature sensors, which are used to help the thermostat stop heating when the target temperature is set to help you save energy.”

I wonder which salesman thought that shoite up, why would you want two points of temperature measurement on a single zone ? what are they going to do, divide the measurement by 2 then go with that ?