Good to hear from you Rob. What are you shooting with these days?
Chuck Norcutt
On 12/2/2012 2:32 PM, Rob Harrison wrote:
> I missed this thread (just occasionally checking in on the web these days)
> but if anyone has questions about efficient mechanical systems, I am happy
> to share what I know about them off-list. I'm not a mechanical engineer,
> but I've been seriously engaged in Passive House (Passivhaus) since 2009,
> and have learned heaps about this kind of thing. (Passive House reduces
> heating energy requirements by 90%, *before* adding any on-site energy
> sources like photo-voltaic panels. In order to do that everything including
> both the envelope of the building and the mechanical systems, has to be as
> efficient as possible. Click here to read more on my
> site<http://harrisonarchitects.com/passive_house>.)
> For the most recent Passive House (the second in Seattle) on which I
> consulted <http://www.cascadebuilt.com/projects/park-passive/> we used a
> mini-split air-source heat pump for space heating, and an air-source heat
> pump water heater for domestic hot water. We put the DHW tank inside the
> heated space, and ducted intake and exhaust to the outside. Good stuff.
>
> Rob in Seattle
>
>
>
> On Sat, Dec 1, 2012 at 10:37 AM, Brian Gray <bsg017@xxxxxxxxxxxxxx> wrote:
>
>> As a retired scientist, and for the record, I have to say that I am
>> with Chris Barker when he said
>> <And I agree with you: whether or not climate change is caused by us,
>> there is n
>> o excuse for wasting scarce resources. But for the record I and many
>> scientists
>> of my acquaintance are astounded that anyone still has any doubt.>
>>
>> And I feel that Ken Norton is being overly complacent when he says that
>> the worl
>> d would not have major difficulty in coping with a 20ft rise in sea level.
>> Woul
>> d not the significant reduction in land area available for human
>> occupation cau
>> se significant problems, political as well as technical, even in the
>> majority of
>> countries which have land 20ft above current sea level? And political
>> problems
>> can be more difficult to overcome than technical problems as can indeed be
>> seen
>> in the current debate about how to react to global temperature data.
>>
>> Like Chris, I like to reduce resource usage and am aware that my current
>> car giv
>> es me over 50 miles per UK gallon whereas fifty years ago a car with much
>> lower
>> performance and comfort did not give me much over half that. And the gas
>> energ
>> y used in heating the my home has dropped by a similar amount in thirty
>> years as
>> I have improved insulation and the efficiency of the boiler/furnace. But
>> I dou
>> bt if I will be using a twenty year old camera for a lot longer!
>>
>> Brian Gray
>> --
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