Tado X - Which Starter Kit and Wired or Wireless Room Stat

@Coys1955 Hello. First, it's best to reach out Tado support from the main web site pages with details of your heating system for their advice.

For users to help … and Tado support:

1. What make/model is your 'conventional' programmer? (eg Honeywell ST9400)
2. Does it control both your heating and hot water? (CH and HW).
3. Do you have zone valves for CH and HW (S-Plan or Y-Plan)?
4. What make/model is your wired thermostat?
5. What make/model are the old TRVs?
6. Your boiler documentation says it requires a 'bypass' on the pipework. Do you have an automatic 'bypass'? Or is there a CH radiator without a TRV?

Assuming 'YES' to 1 & 2 and it's switching 240V in 'relay mode'. In principle, I'd suggest the wireless starter kit. The bundle looks OK.

• The new wireless receiver replaces the programmer for CH and HW.
• The new wireless temperature sensor is installed in a suitable location to measure room temperature.
• Bridge the wires in the old wired thermostat, using a Wago connector from the starter kit, so that it will always 'call for heat'.
• Important to know … the wireless temperature sensor also controls the HW. Don't let the batteries go flat, otherwise the HW controls will stop working. It's counter-intuitive, but has caught out some users.
• When you start the install, reach out to Tado support and they will provide DIY wiring instructions.

I'd always advise purchasing from a well-known supplier with a user-friendly return/replacement policy.

Good luck.

@Coys1955 The install is straightforward for a competent sparkie who is familiar with wiring a heating system.

I tend to stick to well-known suppliers, such as Amazon Screwfix and big corporates with easy returns policies. Avoid the on-line marketplaces. In the long-term, that saves a lot of grief.

There are battery warnings from Tado. Depends who you ask: too many or too few. The App gives battery warnings and shows 'off-line' devices.

@Coys1955 Tado X was brought to the UK market in late 2024; after the Dutch market had ironed out the early issues. In some ways X is better than V3+, some features are different. In principle …

• Tado X has upsides for larger homes, supporting thread/matter devices. V3+ uses a single internet dongle.
• The ‘X’ TRVs have integral rechargeable batteries.
• Room temperature measurement is different for rooms with multiple X TRVs, averaging the X devices. V3+ uses a single measuring device.
• V3+ supports off-line schedules, available on request. X does not support off-line schedules.
• If you use boiler ‘bus’ controls, eg EMS or opentherm, best to ask @policywonk for advice.

We took a leap of faith three years ago with V3+ controls. Our energy provider ‘insights’ say we are using 20% less energy than ‘similar’ homes. At a postcode level, the data says 40% less. No promises that’s achievable for everyone

@Coys1955 The FP715 manual says there are two models:230V or 24V.

Relay: Both models are switching two 'single pole double throw' (SPDT) relays to control the CH and HW. Rated at 240 volt or 24 volt for a 3 amp resistive load; or 1 amp for a non-resistive load (inductive or capacitive).

HTH.

@Coys1955 Hello. We have a similar sized Tado system in a 1960’s home. It took three months to figure out what worked well for us. Our 2024 savings (and forecast 2025) are £800 a year.