System boiler or heat only?

[David937]

Hi there,

I was just wondering what's the best in terms of reliability and general performance.

a) System boiler and cylinder (unvented or vented)

b) Heat only boiler with sealed system kit and cylinder.

Looking at some of the Vaillant boilers, the heat only ones seem to have a much wider modulation range, would this be more efficient?

 

[dcawkwell]

Hi there,

I was just wondering what's the best in terms of reliability and general performance.

a) System boiler and cylinder (unvented or vented)

b) Heat only boiler with sealed system kit and cylinder.

Looking at some of the Vaillant boilers, the heat only ones seem to have a much wider modulation range, would this be more efficient?

System boiler everytime.
I don't install heat only. I want everything in the one box pump and expansion vessel.

 

[kevplumb]

System boiler everytime.
I don't install heat only. I want everything in the one box pump and expansion vessel.

bit complicated ehh

 

[David937]

Reason I ask this is because when I went on work experience nearly all the boilers they had installed in properties with a cylinder were Glow-worm HXI's with a sealed system kit, dunno why I never asked about not using system boilers

 

[dcawkwell]

bit complicated ehh [/quote]

Just faster to install and therefore the pump and expansion vessel
are covered under manufacturers warranty.
You can also pump harder with a sealed system.

 

[ajrtd]

You can also pump harder with a sealed system.

Must get myself one of those

 

[Tibbot]

therefore the pump and expansion vessel
are covered under manufacturers warranty.

Then twice the price and half the availability after the warranty expires.

 

[kevplumb]

You can also pump harder with a sealed system.

do expand on that please

it's that bleedin david937 again causing bother

 

[David937]

it's that bleedin david937 again causing bother

I must concentrate on my GCSE's so I can do nuclear physics in uni instead of causing you guys bother on here

 

[kevplumb]

now theres a thought a nuclear chp unit

start drawing fella

 

[spraggo]

Hi David937

For your questions to be answered simply "google" heat only boilers or, system boilers.

Regards

spraggo