Boiler selection advice

[spudnik]

Evening all - I'm part way through a re-build project and need a 40,000 btu boiler to run a megaflow type system with underfloor heating.

I was advised to look at a Worcester bosch greenstar 40 CDI system boiler, which on the face of it looks like it'll do the job.

My installer has recommended a Keston C40 boiler as an alternative that will allow us to use a redundant chimney for flueing.

After an hour surfing around researching the Keston option I haven't found much support for this option.

Any advice on selecting either of these boilers or alternatives would be greatly appreciated.

Main requirements are -wall mounted, up to 40,000 btu output, preference for vertical fluing, self ventilating to go into enclosure.

Many thanks

Spudnik

 

[mogget]

Worcester bosch greenstar 40 CDI

40,000 btu output,

I think you should check whether you're working in btu/h or kilowatts

 

[spudnik]

Whoops, should have read 40,000 watts - thanks for pointing it out.

Spudnik

 

[gas4you]

I wouldn't fit a worcester as long as I still have a hole in me arris

Have a look at the ATAG, they do a plastic flue liner that is suitable for existing chimneys/flues.

But then so do Halstead

 

[mickyg]

Just don't buy a Keston

 

[Agile]

Who has calculated 40 kW ?

A typical three bed semi needs about 10-12 kW.

Do you really have a 12 bedroom detached house?

In that case I might be inclined to suggest two smaller boilers with an intelligent control system as that will be more efficient.

If so then you will already know that your gas bill will be about £3000-£4000 per annum.

Tony