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Passiv Smart Thermostat - Help & Forum Support

Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

Last Post by Will H 2 months ago

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Tim441

(@tim441)

Honorable Member Contributor

Joined: 3 years ago

Posts: 398

Topic starter 12/01/2026 10:31 am [#2735]

I have a LG Therma V - installed 2020. Controls and data are not great - even if improving in later models.

I don't have the ability to setup Home Assistant and so far have not found another good option.

I came across Passiv Smart Thermostat which are aimed at many heat pumps

I thought I'd add here as potentially of use to others?

https://pstinstallers.zendesk.com/hc/en-gb/articles/38123827312273-List-of-compatible-heat-pump-models

This topic was modified 3 months ago by Mars

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV

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Tim441

(@tim441)

Honorable Member Contributor

Joined: 3 years ago

Posts: 398

Topic starter 12/01/2026 10:32 am

Main website

http://www.passivuk.com/

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Mars

(@editor)

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Joined: 5 years ago

Posts: 4516

12/01/2026 10:42 am

Thanks @tim441. Interesting timing, as Passiv are a currently an advertising partner on Renewable Heating Hub, so I think I'll partially hijack your thread and transform it into a "Passiv Smart Thermostat – Help & Forum Support" where people can ask questions and I can get the team at Passiv to answer questions anyone has about their products and how they're complimentary to heat pump systems.

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petch

(@petch)

Active Member Member

Joined: 2 months ago

Posts: 14

13/02/2026 11:36 pm

How do people like this? I was looking for thermostats that are for ASHP that do not have an ongoing subscription fee

I also want to know if this can be used with a Grant R290, and if so, do I need the Aerona Smart Controller or could this replace it entirely?

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Mars

(@editor)

Illustrious Member Admin

Joined: 5 years ago

Posts: 4516

13/02/2026 11:42 pm

@petch I’ve not come across anyone yet that’s used these thermostats so can’t comment on that, but @fraser-allison or @will-h might be able to comment on compatibility with your Grant heat pump.

Get a copy of The Ultimate Guide to Heat Pumps

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Will H

(@will-h)

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Joined: 2 months ago

Posts: 1

18/02/2026 10:41 am

@petch We are not yet compatible with the R290 from Grant but we do support their R32 units.

You can find all the models we are compatible with here.

We regularly add new integrations, so hopefully we will support the Grant R290 in the not too distant future!

And you are correct that we don't charge any subscription fees - all the features of the Passiv Smart Thermostat (flow temperature, time of use tariff and solar PV optimisation) are included for free!

This post was modified 2 months ago by Mars

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