I need to make a decision about the new heating system in the next week or so; after all the debate and advice here (and lots of web crawling) a DPS GXV heat bank with a Worcester Greenstar 29HE are still the current favourites. A couple of questions:
- I need 3 heating zones, what's the advantage of using a pump for each zone rather than one pump and 3 zone valves?
- Is there a significant disadvantage in joining the heating returns and running back to the cylinder in one long'ish pipe or should I run 3 separate returns?
- Because the cylinder will be in the garage I want a recirculating pump on the DHW but how can this work when the water is just being recirculated around pipework and not through a heat source?
- Having a directly heated cylinder presumably means there's more delay between the room stat demanding heat and the rads providing it - is this noticeable in practise?
Dave S