Drayton Wiser 1-Channel Kit review
Drayton Wiser Wireless Heating 1-Channel Radiator Thermostat Control Kit (White) — 3394V
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 1 (2nd Gen) with Two Radiator Thermostats — Combi Boilers in our Radiator & heating efficiency guide.
Key specs
The maker's figures.
- What it is
- Wireless multi-room heating control kit
- How it works
- Mains hub bridges the boiler
- Fits
- Room thermostat is battery-powered and wireless
- Install effort
- DIY-friendly: swapping a TRV head onto
This kit turns a couple of radiators and the boiler into a zoned, app-scheduled system using your existing valves, with no ongoing subscription for core features. Independent research Drayton cites (BEAMA and Salford University, 2021) points to average savings of up to 19% from radiator thermostats — treat that as a guide, not a promise, since actual savings depend on the home and how it's used.
- Best for
- Households wanting proper room-by-room heating control without replacing existing radiator valve bodies
- Skip it if
- You need Apple HomeKit integration, or if you already run a whole-home smart thermostat system
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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
- No subscription needed for scheduling, boost or app control
- Fits most existing UK radiator valves via the included Danfoss RA and M30x1.5mm adaptors — no drain-down needed if your valve body is already one of those two patterns
- 7-day scheduling, boost function and Alexa/Google Home voice control
Worth knowing
- No Apple HomeKit support
- Full weather compensation needs an OpenTherm-compatible boiler — on other boilers you lose some of the modulation benefit
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Who shouldn't buy this
Don't buy if you need Apple HomeKit integration, or if you already run a whole-home smart thermostat system — this kit is best as a first step or a top-up to two extra rooms, not a full-house retrofit on its own. Check your radiator valves before ordering, too: a pattern other than Danfoss RA or M30x1.5mm means replacing the valve body (and draining the system) before the kit will fit.
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, 23:07 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, 23:07 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, 23:07 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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