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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

Buy individually or both books together. Delivery is free!


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  1.  
    Worcester Bosch Greenstar 28i £600

    Any good?
    • CommentAuthorJonG
    • CommentTimeApr 26th 2016
     
    No not in my opinion, HE is aluminium, wiring loom is overtly complex, mostly plastic heat block and manifold, loom at an Intergas 32kw Rapid instead. Cheaper only 4 moving parts and a HE that a tank could run over.
  2.  
    Where are you getting those cheaper than £600?
    • CommentAuthorJonG
    • CommentTimeApr 26th 2016
     
    £565 Incl the flue http://www.allaboutgas.com/
    • CommentAuthortony
    • CommentTimeApr 26th 2016
     
    Cheapest is not likely to be what to go for, there is more to value than price
    • CommentAuthorJonG
    • CommentTimeApr 26th 2016
     
    True tony but Intergas just won Heating Innovation of the year and the HRE/Rapid are almost identical.
  3.  
    Agreed on cheapest not being best, but there are even cheaper ones about...
    • CommentAuthoratomicbisf
    • CommentTimeApr 27th 2016
     
    Is that the same thing as a 28i Junior? That's what I've got and it seems ok, plenty of flow rate for a shower (I don't normally have it on full, to save water). I didn't have much choice in boiler though as I got a grant towards it and that restricted who I could use to install it (and what they offered)

    Ed
    • CommentAuthorcascina
    • CommentTimeApr 27th 2016
     
    I wasn't a massive fan of the Worcester as they mostly had an expansion vessel at the rear of the boiler and were a devil to change when installed in tight cupboards, as inevitably they are. I would also look at key spares availability and costs. A big advantage of the Worcester is that they continue to produce spares for years after boilers go out of production and are always quickly available without requiring ordering.

    I mostly installed Vaillants but they are not without their issues, requiring an immaculate system. Even with that they regularly suffered difficult to diagnose faults (F75), with a 7-10 year warranty on Worcester or Vaillant now and engineer coverage meaning warranty callouts are attended quickly and efficiently I would be happy with either if correctly installed on a clean system. Not saying that intergas or Veissmann are not good, just that they don't have the coverage of engineers or parts availability.

    I had a customer with a 3 year old Vokera and it broke down so frequently they were always using tenuous reasons to refuse to attend and in the end out of pure frustration he swapped it over to a Vaillant. It did break down two years later but they attended the next day, changed the parts and all were happy.
  4.  
    JonG is 100% correct. The Intergas Rapid is amazing value for money and one of the best and most reliable combis made. The higher the flow rate the more you pay like any other combi. The Intergas has integral weather compensation thrown in. Another worth looking at is the rival to the Intergas, the Ferroli Modena. Like the Intergas only 4 moving parts and simple to service. The Ferroli also has a higher flow rate model which delivers 16 litres/minute. The Intergas was built for the Dutch social housing market. It had to be: cheap to buy, easy to service, simple and last and last. They succeeded. It was introduced just over 20 years ago in Holland. Intergas claim they have never replaced any heat exchangers ever.

    cascina, Intergas parts are available with next day delivery. Plumb Center supply & promote them and carry parts in Parts Center.
  5.  
    Another point is that most combis are a compromise of design. They use the main gas heat exchanger for system boilers, heating boilers and combis. For example, the Vaillant uses a French main gas heat exchanger made by Giannoni. The Giannoni is used by many makers. To convert their system boiler into a combi they add a water section with a 3-way valve and an additional DHW plate heat exchanger. These parts are usually shoehorned into the cabinet making it difficult to maintain as parts access is severely limited.

    The best combis are designed as a combi from the outset. They tend to incorporate the main gas heat exchanger with the DHW heat exchanger in one unit. This saves space. It also means less parts are needed like DHW plate heat exchangers and 3-way valves and the associated controls. The whole of the back panel of the Intergas is the heat exchanger. Examples are, the Intergas combi and Ferroli Modena which are designed purely as combis. Both have only 4 moving parts with easy access to the parts inside the case.
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