Unvented cylinder size

[Notagainpike]

200/210 or 250l indirect unvented cylinder...

Pros and cons of both please guys, whats the thinking??
Better to go bigger, or are there other considerations to be thought of....?

 

[EvilDrPorkChop]

I have 170l on HW Priority and well, it's not enough (Cylinder was existing in house when we bought). 2 People at 20lpm showers. It reheats rapid (Maybe like 10 minutes), but personally if you've got the physical room i'd go with a minimum of 250l. Especially in a 4 bed house.

You don't need fancy controls. You can do it quite simply with a relay that costs £15.

 

[Timmy D]

How many bathrooms?

If 1, another option is to put in a plate heat exchange and go instantaneous with no store of hot water...

 

[Notagainpike]

How many bathrooms?

If 1, another option is to put in a plate heat exchange and go instantaneous with no store of hot water...

1 bath, 1 ensuite, maybe a 2nd ensuite at some point...
Bungalow, so head height is an issue...hww pressure is poor

 

[Notagainpike]

I have 170l on HW Priority and well, it's not enough (Cylinder was existing in house when we bought). 2 People at 20lpm showers. It reheats rapid (Maybe like 10 minutes), but personally if you've got the physical room i'd go with a minimum of 250l. Especially in a 4 bed house.

You don't need fancy controls. You can do it quite simply with a relay that costs £15.

Intetesting, im listening....
🤪

 

[EvilDrPorkChop]

1 bath, 1 ensuite, maybe a 2nd ensuite at some point...

Definitely 200+ then. As I said i'd go 250l.

 

[Knappers]

I often spec for 'Gledhill platinum stainless indirect' cylinders. I rate them and they have the floating baffle that eliminates need for expansion vessel and adds a decent amount of accumulation that may help with your 'pressure' issues

 

[Timmy D]

1 bath, 1 ensuite, maybe a 2nd ensuite at some point...
Bungalow, so head height is an issue...hww pressure is poor

No go for the plate heat exchanger with your current sized boiler.

 

[king of pipes]

No go for the plate heat exchanger with your current sized boiler.

330i is a rebadged Glowmorm boiler so she's getting on a bit now probably over ten years or more but if well maintained and serviced I'd connect to a unvented cylinder or you may want to consider a boiler upgrade at the same time , but as Timmy has said not suitable for a plate heat install as it is .

 

[Notagainpike]

330i is a rebadged Glowmorm boiler so she's getting on a bit now probably over ten years or more but if well maintained and serviced I'd connect to a unvented cylinder or you may want to consider a boiler upgrade at the same time , but as Timmy has said not suitable for a plate heat install as it is .

Yeah, thats the one, it still works and gives us heat! Its bastard expensive to run mind...
Im not against upgrading it, but i need to justify the cost against the working unit tbh...

Water softners a thing to look at....? Whats the best thing without spending a million bucks....😫

 

[king of pipes]

Never had a problem with Monarch water softeners and reasonably priced , I'd maybe think hard and get both boiler and cylinder done fit weather compensation is a must now to save energy. Kop

 

[Notagainpike]

Never had a problem with Monarch water softeners and reasonably priced , I'd maybe think hard and get both boiler and cylinder done fit weather compensation is a must now to save energy. Kop

Sorry Kop. Youve lost me on this one....🤷

 

[Notagainpike]

I often spec for 'Gledhill platinum stainless indirect' cylinders. I rate them and they have the floating baffle that eliminates need for expansion vessel and adds a decent amount of accumulation that may help with your 'pressure' issues

CAnt fit this as i havnt quite got the head height in the loft...

 

[king of pipes]

Yeah, thats the one, it still works and gives us heat! Its bastard expensive to run mind...
Im not against upgrading it, but i need to justify the cost against the working unit tbh...

Water softners a thing to look at....? Whats the best thing without spending a million bucks....😫

Here's one I recommend around £500 . Kop

 

[king of pipes]

Sorry Kop. Youve lost me on this one....🤷

Lost how mate? A new boiler and unvented cylinder with the boiler wired to a external weather sensor , I've recommended a water softener above . Kop

 

[Notagainpike]

Lost how mate? A new boiler and unvented cylinder with the boiler wired to a external weather sensor , I've recommended a water softener above . Kop

Many thanks Kop. External weather sensor....
Christ..im off to google😂

 

[Notagainpike]

Lost how mate? A new boiler and unvented cylinder with the boiler wired to a external weather sensor , I've recommended a water softener above . Kop

SO, at present im on a y plan, am i right in thinking, with an unvented a cylinder, it would be best to change over to an s plan, with the two valves close to the boiler? And if so, do i require an extra 5 or 6 core wire to link up new valves,??
If the y plan stays, i assume the new valve just goes near the cylinder somewhere and gets wired to the control centre....

Just want to try and do half a job! But do it right once!
New boiler is a bit costly at present...

 

[Chuck]

SO, at present im on a y plan, am i right in thinking, with an unvented a cylinder, it would be best to change over to an s plan, with the two valves close to the boiler?

Weather compensation, if that's what you are still considering (I've lost track), is incompatible with standard S-plan with a cylinder as one zone because most of the time the CH water is below the 65°C minimum needed to heat the cylinder.

 

[Notagainpike]

Weather compensation, if that's what you are still considering (I've lost track), is incompatible with standard S-plan with a cylinder as one zone because most of the time the CH water is below the 65°C minimum needed to heat the cylinder.

Me 2!🤣

 

[king of pipes]

Various ways to do it but here's the Ideal wiring diagram for their heat only boiler and unvented cylinder with a outdoor sensor installed .Kop

 

[king of pipes]

SO, at present im on a y plan, am i right in thinking, with an unvented a cylinder, it would be best to change over to an s plan, with the two valves close to the boiler? And if so, do i require an extra 5 or 6 core wire to link up new valves,??
If the y plan stays, i assume the new valve just goes near the cylinder somewhere and gets wired to the control centre....

Just want to try and do half a job! But do it right once!
New boiler is a bit costly at present...

5 core and basically yes I'd change the 3 port to two or even 3 - 2 ports zone valves does your property need to be as warm upstairs as it does downstairs?