W
Water Systems
bripl said:you want reliabilty avoid a combi,you want something that will work for years without attention avoid a combi.
You obviously have no experience of high class boilers.
bripl said:you want reliabilty avoid a combi,you want something that will work for years without attention avoid a combi.
novicetodiy said:Would everyone pretty much go with that?
you want reliabilty avoid a combi,you want something that will work for years without attention avoid a combi.just my personal opinion out of your selection worc or the vailiant would be the safer bets,have a look at viessman boilers vitodens 200 would be a good one,a bit dearer than the ones you mentioned but more reliable long term
So would you recommend a system boiler with unvented clyinder, so I can get high pressure hot and cold to all taps, plus free up loft of tanks?
novicetodiy said:Thanks everyone for their thoughts!
OK just had an installer come round to give price on system.
If thinks it best to go for the Rolls Royce of boiler systems: Heatrae Sadia Megaflo!
Reasons
-High Pressure,
-Flow rate, upto Up to 72 litres per minute depending on adequate supply conditions.
-Built in immersion heater, backup hot water if boiler goes down
-Gets rid of Header and expansion tank
He recommend the Valliant ecoTec plus system, not sure exact model.
My only concern is what kind of recovery rates are we looking at, if the clyinder runs out of hot water?
Is there any other thoughts on unvented solution?
Also I have old lead mains coming into the house, but 3 bar pressure from kitchen. Might need to upgrade mains coming to 30mm plastic.
novicetodiy said:Thanks everyone for their thoughts!
OK just had an installer come round to give price on system.
If thinks it best to go for the Rolls Royce of boiler systems:
He recommend the Valliant ecoTec plus system, not sure exact model.
would tell him to go away nicely. A Glow Worm HXi boiler (made by Vaillant) and an integrated heat bank (thermal store with a plate heat exchanger) . The CH is taken off the store.
Unvented cylinders require an annual service so at today’s prices £2000 over 20 years for just a storing water.
Heat banks give:
- high pressure mains water that is instantly heated.
- No annual service.
- no risk of explosion. Unvented cylinders can do this:
http://www.waterheaterblast.com
- a buffer for CH
- a buffer for the boiler
- TRVs on all rads when a Grundfoss Alpha pump is fitted on the CH.
- High flows than megaflos
- A neutral point for the system
- elimination of boiler cycling.
novicetodiy said:would tell him to go away nicely. A Glow Worm HXi boiler (made by Vaillant) and an integrated heat bank (thermal store with a plate heat exchanger) . The CH is taken off the store.
Unvented cylinders require an annual service so at today’s prices £2000 over 20 years for just a storing water.
Heat banks give:
- high pressure mains water that is instantly heated.
- No annual service.
- no risk of explosion. Unvented cylinders can do this:
http://www.waterheaterblast.com
- a buffer for CH
- a buffer for the boiler
- TRVs on all rads when a Grundfoss Alpha pump is fitted on the CH.
- High flows than megaflos
- A neutral point for the system
- elimination of boiler cycling.
The Glow Worm sounds like a very go solution to the unvented cylinder. Looked at the spec and the DHW flow rate is 14 l/per min, where as the unvented can, from what I understand, deliver considerable more.
The movie clip has phased me, wouldn't want that to happen in my house. Looks like a scene from Lebanon, Hizbullah RPG coming from the ground
corgiman said:Water systems this is not fair and you have to stop doing it now
This is the second time i have found myself agreeing with you
Thermal stores do deliver a much better flow rate and require little in the way of servicing as water said, but dont forget that they also increase the capacity of the central heating system considerably and require MORE INHIBITER
they amount I have gone to that have sludged up to wotsit in no time cos the original installer just whopped a litre of sentinel in it is untold.
one thing though which may be of relevance to you is that not many jobbing plumbers now a lot about thermal stores (that said not many BG lads do either) so this may effect you when you need a repair made on it when it is out of warrantee
just a thought thats all
PS do not need any special registration to fit a thermal store unlike a unvented hot water storage system, though you'd like to know
corgiman said:Good points all
As to my last bit about repairing them, I find therm simple, you find them simple but i have followed many many many op's who dont and give every excuse under the sun just to get the hell out of it. You will find someone to sort it but you may have to go through a few before you find them
corgiman said:Why not
do you seriously expect every bloke out there to know about everything?????? we cant all be Agile (amen )
Up untill recent (thanks to gledhill) thermal stores were something of a rarity, so why would anyone spend their hard earned training up on something they would have seen once in a blue moon.
That said they would be well advised to get up to speed very quickly now
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