Unvented hot water cylinder typical cost

1 Mar 2011
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West Glamorgan
United Kingdom

What is the average cost of the installation of a new unvented hot water cylinder ?

We want to replace our existing vented hot water cylinder and re-site it from the bathroom to the boiler room downstairs, replace/re-run pipework and remove the cold water storage tank from the loft.

We already have a relatively new Worcester Bosch system boiler so this is compatible with an unvented system.

We have had a quote for this work and a Gledhill 300l unvented cylinder for £2000
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Sounds reasonable. I've just priced pretty much exactly the same job for a customer of mine, at £1846.90+vat
Ok great thanks.

Would be interested in hearing your thoughts regarding this - are Gledhill any good? Will it require all new pipework from the new unvented cylinder which will be moved downstairs next to the boiler to the hot/cold water pipework around the house?
I understand that all of the pipework in the loft will be removed along with all of the pipework in the airing cupboard in the bathroom along with the vented cylinder - I was just thinking how would the new unvented cylinder supply the shower and bath along with the hot taps around the home?
Personally I prefer Joule Cyclone cylinders. How much new pipework is needed is very much on a case-by-case basis but if there are suitably sized pipes already in place, which don't look like they're about to fall to bits, there's little point replacing them for the sake of it. If they need a size upgrade then obviously that should be done.
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The most important aspect is what mains supply you have and if it's flow and pressure will deliver peak performance from the UV.
You haven't mentioned this. Did you get that tested and have you the results?
I think we paid around £2,250 for an unvented cylinder with immersion element, conversion to a sealed system, powerflush, new diverter valves, digital controller and thermostat and a boiler service.
£1200 all in for a conversion from a traditional gravity system to a 210 litre unvented system. 1.5 days work. Conversion of CH to a sealed pressurised system £200 all in 0.5 days. Loft room does not now contain any large water tanks and our mixer shower runs like a dream :). Result.

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