Update - the system has been in for a while and so far all working fine. We ended up with:
One thing we have noticed... our stats are all hidden out of sight so we put the Heatmiser NeoUltra in the kitchen so we can control the whole house from there. In reality we just use our phone to control everything as the *new* android app makes it very easy to have full control of every room with a swipe of your thumb!
- ATAG system boiler & unvented cylinder
- Heatmiser NeoStat system with remote thimble sensors in each room, stats all located in services cupboard
- First Manifold to downstairs underfloor heating
- Second Manifold to upstairs radiators
One thing we have noticed... our stats are all hidden out of sight so we put the Heatmiser NeoUltra in the kitchen so we can control the whole house from there. In reality we just use our phone to control everything as the *new* android app makes it very easy to have full control of every room with a swipe of your thumb!