Drayton Wiser 2-Channel Kit review
Drayton Wiser Wireless Heating & Hot Water 2-Channel Smart Radiator Thermostat Control Kit (White) — 4923V
By Tom Calder
We no longer recommend this model, so it no longer appears in our buying guides. In its place, we now recommend Drayton Wiser Multi-Zone Kit 2 (2nd Gen) — Heating & Hot Water in our Radiator & heating efficiency guide.
Key specs
The maker's figures.
- What it is
- Wireless 2-channel smart heating & hot water kit
- How it works
- App/voice scheduling via hub
- Fits
- Conventional or system boiler with a hot water
- Install effort
- TRVs are DIY-fit (M30 thread)
A capable, well-established 2-channel smart heating kit that layers room-by-room control and separate hot water scheduling onto an existing conventional or system boiler with a hot water cylinder. It's a genuine upgrade over a single dumb thermostat for anyone with rooms that heat unevenly, but the value comes from how consistently you use the scheduling — it won't save money left on factory settings.
- Best for
- Multi-radiator homes wanting room-by-room scheduling and separate hot water timing without replacing the boiler.
- Skip it if
- You have a combi boiler
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Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Separate heating and hot water channels with proper 7-day, room-level scheduling
- Works with Alexa and Google Home; boost and holiday modes built in
- No subscription — control stays free after purchase
Worth knowing
- No Apple HomeKit support, which rules it out for some smart-home setups
- Hub wiring at the boiler/programmer is an electrical job, not a pure DIY unbox-and-go install
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Who shouldn't buy this
Don't buy this if you have a combi boiler — the second channel is for hot water cylinder control, so combi owners need Drayton's 1-channel Wiser Kit instead. Also skip it if you're on Apple HomeKit, or if you just want a single thermostat swap — a basic smart room thermostat is cheaper and simpler if you don't need multi-zone or hot water control.
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for Homeowners protecting a working boiler and radiators from sludge build-up, fitted as part of a proper service or after a flush.
as of 4 Nov 2026, 21:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for Topping up inhibitor levels in an existing wet central heating system, or dosing a system after a power flush or radiator/boiler work.
as of 4 Nov 2026, 21:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for Homeowners having a boiler serviced, repaired or replaced who want the new or existing system protected from sludge going forward.
as of 4 Nov 2026, 21:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Free alerts for your home
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