J
jitno123
HI all,
I am currently in the process of having a loft conversion done, of which I need to upgrade/change the heating and hot water system as the house will be a 5bedroom with 1bathroom and 2 showerooms once complete.
I currently have a Worcester Bosch condensor boiler which is 24kw, which has the usual cold water and header tank in the loft and hot water tank in the airing cupboard. As part of this loft project I'd like to upgrade to an unvented system but I have a few questions about this before I start getting quotes:
1) Direct or indirect? My builder recons direct unvented costs less to heat up water than indirect, I would've thought using electricty would be more on the bills side? He's suggesting doing the water on electric and keep the central heating on gas? (Defo Wont be using builder for plumbing works)
2) Do I need to change my boiler to be able to replace the vented cylinder for an unvented? Or can the system be changed to sealed? I don't mind keeping the small header tank as this can be tucked away in a corner but the large header tank needs to be removed.
3) Looks like my incoming mains is 15mm pipe, so may have to get this upgraded. What happens if I don't? Will the unvented not work at all/poor performance?
4) I have a feeling a 24kw boiler will be too small to heat around 18 radiators (once finished)- Should I change the upgrade at this point too? If so what boiler/setup would you recommend?
Many thanks!
I am currently in the process of having a loft conversion done, of which I need to upgrade/change the heating and hot water system as the house will be a 5bedroom with 1bathroom and 2 showerooms once complete.
I currently have a Worcester Bosch condensor boiler which is 24kw, which has the usual cold water and header tank in the loft and hot water tank in the airing cupboard. As part of this loft project I'd like to upgrade to an unvented system but I have a few questions about this before I start getting quotes:
1) Direct or indirect? My builder recons direct unvented costs less to heat up water than indirect, I would've thought using electricty would be more on the bills side? He's suggesting doing the water on electric and keep the central heating on gas? (Defo Wont be using builder for plumbing works)
2) Do I need to change my boiler to be able to replace the vented cylinder for an unvented? Or can the system be changed to sealed? I don't mind keeping the small header tank as this can be tucked away in a corner but the large header tank needs to be removed.
3) Looks like my incoming mains is 15mm pipe, so may have to get this upgraded. What happens if I don't? Will the unvented not work at all/poor performance?
4) I have a feeling a 24kw boiler will be too small to heat around 18 radiators (once finished)- Should I change the upgrade at this point too? If so what boiler/setup would you recommend?
Many thanks!