Storage combi boilers

[Gemma]

Hi, I'm looking for opinions on storage combi boilers - particularly the viessmann 111-w. We currently have a gravity fed system but the space where the cylinder is is needed for internal renovations. Would this be a good solution - ie better than a standard combi in terms of hot water provision? We do have space for the boiler itself (I understand it is larger than standard combis).

 

[Scott_D]

How many bathrooms do you have?
What’s your incoming flow and pressure?

 

[Gemma]

Mains was measured at 20lpm at the outside tap. Currently have one bathroom with shower over the bath (power shower - I understand this will have to go). Will be potentially adding an en suite in future but I expect the shower over the bath will become redundant if we do. Main requirements at the moment are to free up space where the cylinder is and to ensure we still get a decent (as in good pressure) hot shower over the bath. But I've never lived in a house with a combi before so I'm a bit concerned about all the negatives I've read (drop in pressure when a tap turned etc).

 

[Riley]

You will need static and dynamic pressure and flow this will ascertain If you have the capability when more than one outlet is open. If you have any ideals to run more than one good shower or a shower and the bath at the same time then I wouldn’t look at a combi

 

[Aire]

How many occupants does your house have and how likely will it be that multiple hot water outlets will be used?

 

[Old Account]

Have you got mains lead pipe?or is the mains pipe already upgraded?

 

[Aire]

Have you got mains lead pipe?or is the mains pipe already upgraded?

Or cast iron, they're a nightmare for furring up and reducing flow rates.

 

[Gemma]

I'm told the mains pipe is plastic?

 

[Riley]

Get it checked and get the additional water measurements otherwise you may get caught out

 

[Gemma]

Will do, thank you. Is a storage combi worth paying extra for over and above a standard combi assuming measurements ok?