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SiterwellThermostats

Siterwell Radiator thermostats

CSA CertifiedCertification record

Matter certified: Yes. CSA certificate CSA23J43MAT42446-24. This version is sold outside the US; we link no US store for it. Certificate data: CSA ledger read .

Works with
Matter certified as a thermostat, so it can work with Matter apps such as Apple Home, Google Home, Alexa and SmartThings when the app supports its device type; supported features vary by app. The maker hasn’t named platforms on a page we hold.
Network & hub
Thread; needs a Thread border router as well as your platform’s Matter controller

Updated : the last change to this page’s certification, platform or store facts.

Not sold by a US store we can verify. Similar CSA-certified smart thermostats you can buy:

Independent guide. We may earn a commission through affiliate links. Direct non-affiliate links are labeled. How our links work

Why these: we have no US store link we can verify for this exact model. Each is a different product, certified by the CSA as the same device type, thermostat, with a CSA certificate for its own model and a store link we checked. The order is not a ranking.

Is the Siterwell Radiator thermostats sold in the US?

MatterCatalog labels it as sold outside the US: EU version. We don't link a US store for this regional version.

What you can do

We link a US store only after its listing matches this exact model. We check only stores our rules let us read, so a store we could not check may still sell it.

Sold outside the USEU version

Certification record

A Matter certification on file for this model. There is no product photo or store link for it yet.

Certificate ID
CSA23J43MAT42446-24
Maker
Siterwell
Device type
Thermostats
Connection
Thread

Sold outside the US: we don't link a US store for this regional version.

Shop thermostats you can buy now →

Matter 1.0 certificate

Its certificate, CSA23J43MAT42446-24, is for Matter 1.0, certified Nov 21, 2023. The Matter version is the specification version on the certificate's ledger record.

Source: CSA Distributed Compliance Ledger, read Nov 10, 2026.

What Matter 1.0 added, and which devices use it →

Siterwell Radiator thermostats is a smart thermostat. It is listed as a Thread device, so Matter setup needs a Thread border router such as a HomePod mini or a Google Nest Hub (2nd gen). It is CSA Matter certified, so it can work with Matter apps such as Apple Home, Google Home, Alexa and SmartThings when the app supports its device type; supported features vary by app.

Thread

Ecosystem compatibility

Matter
Apple HomeUnverified
AlexaUnverified
Google HomeUnverified
SmartThingsUnverified

Unverified: listed in its catalog record, not confirmed by the maker; check exact controller support.

Thermostats you can buy

Products in this category with a photo and a verified store link.

Best Matter Smart Thermostats 2026

Compare heating-system fit, regional models and exact retailer options.

Read the full buying guide →

More Matter thermostats

All 22 Matter thermostats sold in the US →All Siterwell Matter devices →

Other Matter thermostats in the catalog

Each with its Matter network, certificate status and US store status.

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