[Greenbuilding] Fwd: Arnie's natural ventilation system

[George J. Nesbitt]

We just had a record heat wave in California a few weeks ago.
The east coast is currently being hit.
But it couldn't be Global Warming.

I open my windows at night and naturally ventilate and cool the house.
Works best when there is a slight breeze, not as well during heat waves, 
less breeze.
My house is single story, so not too much stack effect to drive the air 
movement.
Cost, nothing, except noise (I live on a 4 lane street) and pollution.
I have done a fairly good job at reducing my cooling load so far, but 
have more to do (always the best strategy).

The nighbreeze works best in a climate that has a large daily 
temperature difference of 15F or more.
We also use a "whole house fan" to pull cooler air in (www.tamtech.com).
If you are in a dry climate an evaporative cooler can give you daytime 
cooling if needed (www.oasysairconditioning.com).

On the bright side Europe might be plunged back into an ice age, so you 
won't have to worry about it being too hot.
Sorry, an inconvenient truth.



Bob Irving wrote:

>Well, it sort of is natural ventilation because it's using the  
>natural night time temperature fall to cool the house, but admittedly  
>it's using artifice after that....
>
>Thanks for this. Having just had our hottest July ever here in the  
>UK, I might try to get an import deal....
>	Bob
>
>On 2 Aug 2006, at 19:00, George J. Nesbitt wrote:
>
>  
>
>>What you are describing is not natural ventilation, but nighttime  
>>ventilation cooling.
>>It's a residential economizer for nighttime cooling.
>>It was started by Butler (California HVAC Contractor), called Smart  
>>Vent (in house product?).
>>Davis Energy Group has been working with Butler to spread the  
>>technology.
>>They are using a hydronic air hander/fan coil with a ECM fan motor,  
>>and the Smart Vent.
>>It is going under the name Nightbreeze, and is still in pilot.
>>http://www.davisenergy.com/nb_page.html
>>
>>
>>Bob Irving wrote:
>>
>>    
>>
>>>Meant to add the url for the paper which is :
>>>
>>>http://www.energy.ca.gov/reports/2004-03-08_500-04-011.PDF
>>>
>>>Begin forwarded message:
>>>
>>>
>>>      
>>>
>>>>From: Bob Irving <bob.irving at zen.co.uk>
>>>>Date: 2 August 2006 14:20:06 BDT
>>>>To: Greenbuilder list <greenbuilding at listserv.repp.org>
>>>>Subject: [Greenbuilding] Arnie's natural ventilation system
>>>>
>>>>Dear list,
>>>>
>>>>	In my present quest for academic papers on natural ventilation,  
>>>>I've
>>>>found a paper written for the State of California on micro-processor
>>>>control of whole house ventilation systems - to monitor outdoor
>>>>temperatures, compare with internal, and turn on a fan sucking cool,
>>>>night air in to provide over night cooling to reduce the day-time  
>>>>use
>>>>of aircon. It was written in 2002-03. At the time, they said that
>>>>there was no kit available to do this cheaply (or at all) Has anyone
>>>>any idea if it has been put on the market?
>>>>
>>>>	TIA
>>>>	Bob
>>>>
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>>
>
>
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>  
>