VerdictAI

Reviewer consensus · 2026

Best Smart Radiator Valves of 2026What 0 reviewers actually think, trust-weighted

Smart radiator valves (smart TRVs) let you control individual radiators room-by-room, but this is a thin, signal-poor category where independent lab testing and detailed expert reviews are scarce, and many retail listings mix true thermostatic radiator valves in with whole-home wall thermostats. The picks below are limited to genuine smart radiator valves, and our synthesis leans heavily on verified-purchase rating patterns because mainstream tech press and specialist-community coverage for these specific models was minimal in the sources we read. Treat these rankings as a best-available consensus rather than a lab-backed verdict.

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Highest-rated by the consensus

#1 of 3
Top pick · #1Danfoss Ally Radiator Thermostat. Ally, White, IP20, 90 øC, 5 -, W125786971 (Ally, White, IP20, 90 øC, 5-35…
Best overall

Danfoss Ally Radiator Thermostat. Ally, White, IP20, 90 øC, 5 -, W125786971 (Ally, White, IP20, 90 øC, 5-35…

Danfoss

★★★★★4.2(187)72Good

Across the reviewers we read, the Danfoss Ally stands out in this category mostly because it is an established, name-brand thermostatic radiator valve rather than a generic white-label unit, and it carries the strongest verified-purchase rating in the pool at 4.2 stars across 187 ratings. It is a Zigbee device, which makes it a natural fit for buyers who already run a Zigbee hub or want local control, and it covers a wide operating range for European-style radiator setups.

Price

$109.80

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The rest of the rankings

#2,3

Frequently asked

4 questions
Do smart radiator valves need a hub?
Most do. Zigbee models like the Danfoss Ally typically need a Zigbee hub or gateway, and Bluetooth models like the Shelly Blu TRV ship with or require a dedicated gateway to enable remote and automation control. Tuya-based valves generally require a Tuya Zigbee hub. Always confirm the connectivity type and required bridge before buying, since a valve without its matching hub only works manually.
Will a smart radiator valve fit my existing radiator?
Compatibility depends on the valve thread. Many smart TRVs use the common M30x1.5 fitting and include adapters for older European valve bodies, but fit is the single most common complaint across verified-purchase reviews. Measure your existing valve or check the included adapter list before ordering, especially for older or non-standard radiators.
Can smart radiator valves actually save money on heating?
They can, but mostly through behavior change rather than the hardware itself. Room-by-room scheduling and turning down unused rooms is where savings come from. As with smart thermostats generally, reviewers note the savings depend on how disciplined your schedule is, not just on installing the device.
Which smart radiator valve works best with Home Assistant?
Locally controllable options are favored by smart-home enthusiasts. The Shelly Blu TRV advertises Home Assistant compatibility, and Zigbee valves such as the Danfoss Ally are popular for local control through a Zigbee coordinator. Verify local-control support rather than relying on cloud-only apps if a self-hosted setup matters to you.