further to earlier post I am going to go Condensing system boiler. Thanks
Andy & IMM for your input.
Just a question on the Greenstar www.discountedheating.co.uk have the 28he
listed for £750inc flue and VAT but don't seem to think there is the option
for 3 port valve in the case, can't get through to W/B tech line. I can get
a greenstar 27 locally for £50 less, which would almost pay for a 3 port.
The heat outputs seem to be the same, are there any major differences
I really need to get on with ordering so your thoughts most welcome
The Greenstar 27HE System is a discontinued item, hence the price. You may
also find that this supplier is simply 50 quid cheaper but hasn't updated
their model number to the latest one. There aren't many differences between
the 27HE and its 28HE replacement. However, the flue parts are certainly
different. Ensure you buy the right types. The 27HE needs Condensfit, whilst
the 28HE needs Condensfit II. They are not compatible. Having seen both, the
newer flue is better designed.
The Greenstar 28HE System certainly does have the capacity for the internal
diverter valve. It seems like a good, well designed option. I can't use it
myself as it has a 75C max temperature limit, which is no good for me, but
would suit almost any normal hot water cylinder. It's a shame though. If it
went to 82C, it would be ideal, as I could set my CH to 70C and the water to
82C with no need for a blending valve. However, you may find it is a special
Don't bother with the Worcester-Bosch website. They are still only showing
details for the old range.
If you have a single zoned heating application, consider purchasing the
optional programmer and room control. This is an microprocessor control that
modulates down the burner as temperature is reached, rather than cutting the
power. You'll need to check which modules you need, though. It isn't
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