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Hello everyone, I know there have been other posts about this but they are a few years old. My standard thermostat for Vaillant ecotec plus 835 has packed up. It was a bacis Drayton. I have read that the 835 supports modulation and want to utilise it. Vailant have their own SMART thremostats...

Hello everyone, I'm wondering on updates to this post as the last comment was nearly 10 years ago. What has changed since then. My standard thermostat for Vaillant ecotec plus 835 has packed up. It was a bacis Drayton. I have read that the 835 supports modulation and want to utilise it...