[Greenbuilding] Nyle heat pump water heater update

[Nick Pyner]

No.

Current heating is 7 kWh/day

Resistance heater 4.9
heat exchanger     2.1

I submit you will never know how well anything works unless you compare it
to the usage. An electric resistance heater has such a low installed cost it
can be made to beat a solar system any time. All one has to do is shower
once a week.  An electric resistance heater is an anethema to me but, right
now, I am in the process of installing a new one. One of the reasons for
this is that I could well be dead before a solar system is amortised.

Having said that, I recognise that the standard I use is really only good
for local comparison. It is also very hard to apply.



Nick Pyner

Dee Why   NSW

  -----Original Message-----
  From: Greenbuilding
[mailto:greenbuilding-bounces at lists.bioenergylists.org]On Behalf Of Reuben
Deumling


      Current water heating
    is 7 kWh/day of which 30% comes from a grey water heat exchanger.


  Are you saying it would have been 10 kWh/day but for the GWHE?



    All the variables make comparisons difficult.  The only standard I can
see
    is kWh/100 litres, but I seem to be the only person who uses it........



  I don't agree. We can all reference a standard test procedure, but I'm
more interested in what people actually do. How much or how little
electricity and or hot water folks use in a day. At the end of the day it is
the total that matters, not the ratio (or at least that is how it looks to
me).


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