Alexa control hot water heating: what voice can do

You ask the speaker for hot water before a shower, and either the radiators tick on or nothing in the airing cupboard changes. The search behind that moment is alexa control hot water heating. On a combi the tap heats when you open it, so there is no stored cylinder for a voice line to boost. On a system or regular boiler with a tank, hot water is a second channel, and only some listings here claim it.

This page is from Peter F., editor for DIY & tools. The boxes are stored amazon.co.uk listings: Hive with Nano 3 hub (B0DCGMD9KX), tado X (B0D9QBPV51), and tado V3+ (B08LP1LS5T). Hive’s Alexa pages and tado’s X help set what voice may do. We did not fit a boiler or run a lab test. A live basket can differ. A qualifying purchase through our links can earn a commission at no extra cost to you.

In short

Alexa control of hot water heating is a tank job. Hive’s skill offers a hot-water boost if you have a hot water tank, and the heating-only Hive kit does not add that tank. tado X can show hot water in the app, while Matter does not currently support domestic hot water. A programmer in the title still has to match a zone in the app.

Combi hot water and cylinder hot water are different

A combi boiler heats water for the tap as you draw it. There is no cylinder, and no second clock for a morning tank slot. A room thermostat on that system calls for heat in the radiators. Tap temperature stays on the boiler’s own hot-water control, usually a dial or a menu on the case. None of the voice skills claim to move that dial.

A system or regular boiler with a cylinder splits heating and hot water. A programmer, or a receiver with a hot-water channel, can heat the tank on a schedule, and a boost adds a timed run outside that plan. That is where “turn on the hot water” has a switch. An airing cupboard with a tank is this house. A single combi on the kitchen wall is the other.

Wiser’s Alexa page offers a line to turn on the hot water, and that sentence belongs to Wiser. Hive’s shop stops at tank on, tank off, and boost. Heating-only is often the right scope on a combi. A programmer the combi has nowhere to connect does not add a channel. The Alexa thermostat for a combi boiler page sets that match beside the listings. A thermal store beside a combi needs the listing to name the cylinder channel first.

What Hive’s own skill says about a tank

Hive’s Alexa support and the Hive skill listing on amazon.co.uk both attach hot-water commands to one condition: you have a hot water tank. The shop page describes tank on, tank off, and boost. “Ask Hive to boost hot water” is a tank phrase. Said at a combi, it asks for a channel that the boiler does not present to the thermostat.

Wider Hive pages also mention hot water beside a combi and OpenTherm. OpenTherm lets a compatible combi modulate the heating flame instead of a plain on-off relay. It is a heating protocol on one zone, not a stored cylinder. OpenTherm or a simple on-off control is that distinction: the logo is a boiler protocol, not a tank.

That parcel is ASIN B0DCGMD9KX, the Hive thermostat with Nano 3 hub. The stored price is £164.99, with 4.4 from 353 reviews. The listing says heating only, and it is the wrong kit for a conventional boiler that needs separate hot-water control. OpenTherm, where the boiler is compatible, is a heating link. Up to six heating slots a day call for radiators.

Stored reviews praise phone and voice control once pairing has worked. Some describe a long reset before the app saw the unit. If you already own a Hive hub and a separate tank programmer, test the tank caveat in the app before you blame the speaker. The Hive versus tado guide keeps those ASINs apart.

What tado says Matter cannot do

tado’s help for setting up tado X devices with Alexa says Matter does not currently support domestic hot water. The product can still list hot water in the tado app. The search “tado X Alexa hot water not working” is often this gap: the speaker can be paired and the heating can answer while the cylinder stays on the app schedule.

The wireless starter is ASIN B0D9QBPV51, the tado Wireless Smart Thermostat X starter, at a stored £129.99 with 4.4 from 286 reviews. The box includes Wireless Receiver X and the wireless temperature sensor, and the receiver is the Thread border router. Hot water is described for the app. A UK review says Alexa covers the heating rather than the hot water, which matches tado’s Matter help.

X joins Alexa on the Matter route. A V3+ Internet Bridge is not a stand-in, and X does not join V3+. One review describes a hot-water boost fixed at an hour. Matter does not carry domestic hot water, so that hour may exist only in the app.

Listings in this comparison

The Hive with-hub kit, B0DCGMD9KX, suits a combi when you want Hive’s app, the Nano 3 hub, and voice control of the heating. Leave it when a cylinder needs its own channel. OpenTherm, in the terms Hive prints, still belongs to the heating flame.

The top pick is the tado V3+ wireless starter, B08LP1LS5T, whose title includes a hot-water programmer. The stored price is about £57.50, with 4.5 from 307 reviews, the highest star line of these three. The box includes the wireless sensor, the receiver, and the Internet Bridge. That programmer line is a listing claim, not a speaker test we ran. This generation refuses tado X, so fitted X heads make this the wrong family.

B0D9QBPV51, at about £129.99, is the Matter box. Hot water stays in the app. Heating is what the stored review and tado’s Matter help allow Alexa to touch. The other rows sit in the Alexa thermostat comparison. The mismatch to avoid is a cylinder house with the heating-only Hive, or a combi bought because another page said “turn on the hot water”.

Commands that are still worth having

Use the commands that match a channel you can already see in the app. On every kit here, that reliable channel is heating: a target for the room, heating on or off, and a schedule that already exists. Say them after the app shows the thermostat. A speaker with no link to the hub, the bridge, or the Matter code has nothing to pass on.

Leave the hot-water phrase alone on a combi. There is no cylinder switch for it to close. The boiler heats the tap when you open it, at the temperature set on the boiler. If the room is cold, ask for the heating. If the tap is lukewarm, check the boiler’s hot-water setting and the mixer.

On a cylinder, use a hot-water command only when the listing names a tank or programmer and the skill allows it on your generation. Hive’s skill allows a boost if you have a hot water tank. tado’s X help does not allow domestic hot water over Matter. The V3+ title names a programmer. Confirm that zone in the app before you save a routine.

Schedules live in the Hive or tado app as weekly slots. Voice can override a slot for the boost the product allows. It does not hold the week. See heating schedule mistakes. Set the week, including frost protection if you go away, before you trust a routine that needs the speaker. Gas work belongs to a Gas Safe registered engineer.