Replacing Worcester Boiler Advice

[petit_pablo]

I'd take the worcester, the Cdi is a good boiler and parts are generally quite cheap if needed. Plus 10 year warranty on the heat exchanger.

 

[HootingOwl]

Out of those two choices, Worcester CDi Classic. But you really should be thinking of a stored hot water solution.

But I guess that you only get what we pay for.

 

[securitynewbie]

Thanks for your advice guys. I'm happy to go with your choices, but the installer I've got is not accredited by Worcester, so how much standard warranty would I get?

Also if I went with the 38cdi, do you think it's an overkill, considering I currently have 10 radiators and may add another 4 in the near future? The reason I ask, is because I'm not sure if a 38kw boiler takes more energy to run, compared to say a 35kw, even though I might not utilise it fully.

 

[AGAS]

its way overkill for your heating and you have multiple showers which won't happen

 

[muggles]

It's the worst of both worlds, essentially - it'll be far too powerful for your heating system, but won't be powerful enough to keep up with your hot water requirements

 

[Dan Robinson]

I'm not sure if a 38kw boiler takes more energy to run, compared to say a 35kw

eeeerrrm......

 

[securitynewbie]

Thanks guys.

Dan - What I meant was it would cost more in running costs than a 35kw boiler, even though I would be utilising only a small portion of the 38kw's handling power?

 

[muggles]

It depends on the lower modulation rate as much as anything for that, at least as far as the heating goes. For the hot water side, 38kW will cost more than 35kW to run, but you'll get slightly better performance

 

[Dan Robinson]

energy is energy. You use it or you don't. Frankly with such daft oversizing by the installer in order to appear to be giving mega hot water performance, it won't make difference to the heating efficiency as both boilers will be cycling like billio most of the time.

Interestingly perhaps, I wouldn't have either, favouring the Intergas. However if I was to downgrade and go for a Wooshitter of Faillant - it would be the latter.

 

[securitynewbie]

Thanks muggles & dan. Surely if a 38kw boiler uses say 20kw and a 35kw or even 30kw boiler uses 20kw, are they not going to cost the same to run?

 

[muggles]

They are, but neither are going to be using 20kW all the time, you've got 10 radiators so that's probably around 10-12kW required when they're cold and all of them are turned on, and the amount of power required will reduce as they heat up. If your boiler isn't capable of going low enough to cope with the reducing demand, it'll cycle on and off which will use a lot of gas. Lower power (top rate) boilers tend to also be able to go lower at the bottom end as well, making them cheaper to run as they cycle less often. Excessive cycling can also lead to longer heat-up times as well as using more gas

 

[securitynewbie]

Thanks muggles. So assuming I had a choice of only Vaillant or Worcester, how many kw boiler do you recommend for around 13-14 radiators and a shower?

 

[Dan Robinson]

24kw

 

[PullerGas]

That's what's wrong with this country, people with huge assets yet can get free hand-outs from the British tax payer??!! And they're going to fit the wrong appliance too!!!

Whooshiter Tupperware Botch has got to be one of the worst boilers on the market!!

When I was doing the ECO scheme it was Vailliants we fitted.

 

[HootingOwl]

You will get the bare minimum warranty offered by the scheme providing the boiler -usually two years. Worcester will have supplied the boilers at near cost price and without any warranty whatsoever. And given that the boiler will be kicked onto the wall from a moving van, you may need that warranty a bit further down the line.
The boiler is only as good as the installation....