Can I Replace Water Heating with Nest Thermostat

PeteK*

I live in an apartment with electric storage heating where the Nest Thermostat is not an option.

Our water is heated with Horsemann Quartz E7 (2 Hour) Water Heating Control. (PDF link of manual)

By default it is heating our water for far too long and the minimum we can set it is 4 hours, if we can get the cover off and change that. I'm not sure we should.

But we're wondering if anyone can tell us if that can actually be replaced somehow with a smart water heating controller and in particular, Nest Thermostat?


Any advice would be welcome!

Thanks for reading.

Sleeper12

I would think that the nest could indeed control the electric hot water but I doubt it is rated for an immersion. Your immersion can be 2 to 3.5kw. I'm pretty sure that it would require a 16amp load rating but happy to be corrected on that.

Wearb

As Sleeper says, it's way too much of a load for it. You could do it using a contactor.


Do you want me to move this to the Electrical forum?

DublinDilbert

As per above, you need to fit a contactor on the supply for the immersion. This could be fitted in the distribution board by an electrician or local to the immersion heater.

I've a similar setup on zone 2 of my hive and it works perfectly. I can boost it remotely via the app or via the main controller/thermostat.

Wearb

btw It would be a huge waste of a Nest to use it like this. You would be getting no use out of the thermostat part of it.

You could use a sonoff, belkin, tp link etc to do this.