Central Heating

Unvented Hot water system

Anonymous user 13/03/2024 - 2.32 PM

I have a large 4 bedroom semi-detached with at least 15 radiators, underfloor heating in the kitchen diner, a cloakroom sink & toilet, a family bathroom with shower, a loft conversion with a fifth bedroom and a loft bathroom with shower, sink and toilet. I also want a water softener. The radiators are all brand new, the pipes are all brand new (22mm), the mains supply has been replaced and is larger bore. My builder suggested having two Combi boilers in the house one exclusive for the loft and loft bathroom, the other for the rest of the house. However after my own research I am looking into an unvented hot water system, I have a few questions. 1. What is the best System boiler option for the system, (e.g. brand..Worcester,Valiant, what output 37kw?) (this is to be fitted in the kitchen). 2. Where should the actual cylinder go (can it go below the boiler or shall I stick it in the loft), how much space does it take, can it be fitted outside? 3. How much can I expect to pay for a boiler and cylinder. 4. Will the water softener affect the pressure? Many thanks. Wow! Thanks for the answers massive help, I put it to my builde and he was a bit shocked by my knowledge. To be honest he does mean well but I told him I don't want to maintain 2 combi boilers (especially not the cheap ones he was suggesting). The best location I can place the unvented cylinder is outside and build a special little hut for it.