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Matter water heater on Home Assistant

For water heaters, Home Assistant supports pairing, control, automation triggers and automation actions. Our confidence in this answer is Med.

Med confidence

2026-10-22 last checked

4/4 capabilities confirmed

At a glance

Answer	Home Assistant
Pairing	Y
Control	Y
Starts an automation	Y
Controlled by an automation	Y
Confidence	Med
Matter spec	1.4+

Y = confirmed for this device type, Partial = works with limits, N = not supported by this platform, Unknown = not enough dated evidence. These are type-level answers, not a guarantee for one product.

What this means

All four answers are confirmed for this device type on this platform. Individual products can still implement less than the device type — check the product notes before you buy.

Requirements

Hub requirement: Home Assistant Matter Server (HA OS recommended). Thread border router for Thread devices.

Matter spec: 1.4+.

Confidence

The evidence is a mix of official platform documentation and product- or community-level reports; some answers rest on documentation alone.

Last checked 2026-10-22. Last change 2026-10-18 (confidence: High → Med). The answers above come from the published type matrix; the sources below are what they rest on.

Sources

home-assistant.io · official · 2026-10-18
matter-survey.org · community · 2026-10-18

Frequently asked questions

Does Home Assistant support a Matter water heater?

Home Assistant pairs a Matter water heater for target temperature and mode control. Med confidence, checked 2026-10-22. Home Assistant can control a Matter water heater from its app, including target temperature and mode (Med, checked 2026-10-22).

Can Home Assistant automate a Matter water heater?

Yes — a Matter water heater changing mode or temperature can start a Home Assistant automation. A Matter water heater can be used as a Home Assistant automation action (Med, checked 2026-10-22).

What do I need to add a Matter water heater to Home Assistant?

Home Assistant needs a Matter controller before a Matter water heater will pair.

Next steps

All Home Assistant answers for water heaters, side by side — the full water heater matrix across every platform.
Compare Home Assistant with another platform — pairing, control, triggers and actions in one table.
Check whether your setup will work — answer a few questions and get a verdict with caveats.
Matter products of this type — tested products with their own notes and sources.
Matter on Home Assistant: every device type
All platforms compared
How to check Matter certification
Matter firmware updates on each platform
How we check — evidence rules, confidence ratings and how often we re-check.

Other platforms for water heaters

Apple Home — no confirmed support Med
Google Home — no confirmed support Med
Amazon Alexa — no confirmed support Med
SmartThings — supports pairing, control, automation triggers and automation actions Med
Homey — supports pairing, control, automation triggers and automation actions Med
Hubitat — no confirmed support Med

Informational only — verify before you buy. How we check · All water heaters across platforms