Eve Thermo (5th generation)

A better routine is worth more than a new valve

Eve Thermo is most useful in a room whose heating needs change during the day. A home office can follow working hours, while a bedroom follows a different routine. Schedules live on the valve, so they continue without the phone, home hub or internet connection once configured. There is no Eve account or subscription to maintain.

That is a sound reason to replace a manual thermostatic head. It is a weaker reason to replace a working fourth-generation Eve Thermo: that model already offers stored schedules and has a Matter upgrade path. The fifth generation's main attraction for an existing owner is its smaller housing, rather than a new way to heat the room.

At the checked €79.95 single-valve price, the purchase deserves a specific job. Automating a room that is already comfortable on an unchanged daily setting may add little. Start where the schedule is inconvenient or frequently forgotten before buying enough valves for the entire home.

A smaller white block, still beside the radiator

The fifth-generation body measures 55 × 55 × 89 mm, with rounded edges, a temperature display and touch arrows. It is more discreet than its predecessor, though it still looks like an electronic attachment. Two included AA batteries are replaceable from ordinary household stock; there is no rechargeable pack to take away and charge.

It replaces the thermostatic head on a compatible valve, not the water-carrying valve body. M30 × 1.5 fittings are supported directly, with Danfoss RA, RAV and RAVL adapters included. The room's heat still depends on the central system supplying hot water; a radiator valve cannot create heat when that supply is off.

Temperature measurement beside a hot radiator is the more interesting compromise. Eve allows an offset to compensate. In an Apple home, the separate Thermo Control can instead measure at a chosen spot in the room. At another €79.95, that accessory needs to solve a real comfort problem rather than accompany every valve automatically.

A clear choice, with a credible rival

Eve's app creates device schedules through Apple Home on iPhone/iPad or Google Home on Android. Alexa and SmartThings can use their own routines, but do not get that Eve schedule interface. A compatible Thread border router is also required for the smart-home connection.

Tado Smart Radiator Thermostat X is worth comparing at its checked €64.99 single-device offer before shipping. It has a removable USB-C rechargeable battery and a manual control knob, which may suit you better than Eve's AA cells and arrows. Tado also offers free schedules; its paid AI Assist extras are a separate choice.

Choose Eve for its account-free operation and familiar app controls. Keep a working older Eve valve unless its size or condition gives you a concrete reason to replace it.