Safe to have smart trvs on all radiators?

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I've recently moved into a new home and upgraded the ancient heating system with tado wireless extension kit, added trv valves and tado smart trvs.

I left the bathroom radiator without a trv as per traditional advice that there should always be an open rad on the system to protect the pump. However, that advice applies to dumb trvs that aren't interlocked with the boiler, and I wonder given that smart trvs demand heat when open, then stop demanding when they close, in theory I should be OK to add a smart valve to the last radiator? The boiler doesn't have any pump run on, and does as it is told by tado.

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  • samd
    samd ✭✭✭
    edited December 2020
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    @xfield Did your boiler have run-on prior to tado? Mine did and still does so needs one rad un-tadoed.

  • xfield
    edited December 2020
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    @samd TBH I'm assuming it doesn't, but would have to do some tests to confirm. My boiler man confirmed the pump was a later addition to the system. The boiler is genuinely ancient, G rated - and will be replaced in the near future when we renovate the house.

    It does also heat the water tank whenever the central heating is demanded, so I'd have thought that circuit would remain open regardless, effectively making a safe route for the pump in the case of all TRVs being closed.