- Joined
- 13 Mar 2016
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Morning
Had a very productive visit from two separate heating engineers yesterday to make a plan to finally knock my system into shape. Likely to be going down the route of pressurising the system to ensure it works better with wet UFH later this year in the downstairs.
The second guy asked me whether I had considered whether to either replace the vented cylinder (probably nearly 30 years old) with either a unvented cylinder, or to just get rid of the cylinder entirely and go for a combi boiler. Im not really too keen on the latter for various reasons.
But it got me thinking, if the cylinder is going to need to be replaced at some point anyway (HW has never been that hot so maybe the coil is bunged up) - should I just put in an unvented cylinder now and then gain mains pressure cold and hot water throughout the house......
The downside of this as far as I can see it is that I cannot use a shower pump and am dependent on what the pressure from my mains supply is, as I understand it. I have no way to directly measure the mains pressure (although might buy a gauge as I cant resist toys) - but my kitchen tap, which is a 15mm connection directly to the 22mm blue mains pipe - gets a flow rate of 10 litres/ min - which seems to be at the low end of normal. I currently have a 3 bar shower pump which I use to supply both the bath and the two showers. This enables us to reliably run the bath/ have a shower or use both showers at the same time.
When I had a combi boiler on my old house which had a 15mm water main IIRC, we could run the upstairs shower and run a bath at the old time.
It seems to me that staying with an unvented DHW system means I get the advantage of being able to 'boost' my pressure to the places that need it most, where as I dont think you can do this on a combi/ unvented cylinder....
I would appreciate some expert advice so I can decide what to do!?
Many thanks
Had a very productive visit from two separate heating engineers yesterday to make a plan to finally knock my system into shape. Likely to be going down the route of pressurising the system to ensure it works better with wet UFH later this year in the downstairs.
The second guy asked me whether I had considered whether to either replace the vented cylinder (probably nearly 30 years old) with either a unvented cylinder, or to just get rid of the cylinder entirely and go for a combi boiler. Im not really too keen on the latter for various reasons.
But it got me thinking, if the cylinder is going to need to be replaced at some point anyway (HW has never been that hot so maybe the coil is bunged up) - should I just put in an unvented cylinder now and then gain mains pressure cold and hot water throughout the house......
The downside of this as far as I can see it is that I cannot use a shower pump and am dependent on what the pressure from my mains supply is, as I understand it. I have no way to directly measure the mains pressure (although might buy a gauge as I cant resist toys) - but my kitchen tap, which is a 15mm connection directly to the 22mm blue mains pipe - gets a flow rate of 10 litres/ min - which seems to be at the low end of normal. I currently have a 3 bar shower pump which I use to supply both the bath and the two showers. This enables us to reliably run the bath/ have a shower or use both showers at the same time.
When I had a combi boiler on my old house which had a 15mm water main IIRC, we could run the upstairs shower and run a bath at the old time.
It seems to me that staying with an unvented DHW system means I get the advantage of being able to 'boost' my pressure to the places that need it most, where as I dont think you can do this on a combi/ unvented cylinder....
I would appreciate some expert advice so I can decide what to do!?
Many thanks