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Passive Annual Solar Heating [PASH]

 
 
camlok
 
Reply Sun 12 Feb, 2017 08:14 pm
Has anyone ever read of, read about, used this method for "heating" a house.

Read at the following link. It has a great schematic drawing too.

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http://www.earthsongfarm.com/PAHS.html

What is it? ....

PAHS (Passive Annual Heat Storage) is an innovative, practical and simple technoloy of heat collection, storage and retrieval. The principle was developed by John Hait of the Rocky Mountain Research Center in 1983.

PAHS is essentially placing an insulating and waterproof "umbrella" over and about 15-20 ft. beyond a typical earth sheltered home.

With this umbrella keeping the earth dry, thermal energy will travel through the earth, allowing you to store the maximum amount of thermal energy under and around your foundation."

The insulated umbrella also serves as a thermal break between the cold and wet top soil (top 2-3 feet), and the warm and dry soil below, thus increasing the amount of thermal mass available to you to store warmth.

Conventional heating systems are unnecessary!
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camlok
 
  1  
Reply Tue 14 Feb, 2017 12:51 pm
Imagine, living in Texas, never having to worry about your house staying cool, living in the mountains of Maine or Vermont, never having to worry about your house being cold - in both cases, in all cases, Mother Nature providing you with warmth and coolth, in unlimited volumes.
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Builder
 
  1  
Reply Thu 13 Apr, 2017 10:44 pm
We get a bit chilly here in Winter, so I looked at several options for heating our Tiny House on wheels, and settled on the Ecotherm, which uses the hot water storage, to hydronically heat air, just like vehicles use the coolant to heat the cabin space on cars.

So far, I'm impressed.
camlok
 
  1  
Reply Thu 13 Apr, 2017 10:51 pm
@Builder,
What is your average annual temperature swing? Do you know what your annual outdoor air temperature is? This is basically the same as the water temperature of any H2O well that is deeper than say 6 meters/20 feet

I'm thinking that it is rather small compared to Montana, USA where this was done. The heat storage, insulated, waterproofed envelope could be quite small for your heating/cooling demands wherever you live in Australia.

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camlok
 
  1  
Reply Thu 13 Apr, 2017 11:03 pm
Here's the weather data for Missoula, MT, where the house was built. It's average annual outdoor air temperature is 45.9F/7.7C

http://www.usclimatedata.com/climate/missoula/montana/united-states/usmt0231
Builder
 
  1  
Reply Fri 14 Apr, 2017 03:22 pm
@camlok,
Mean temps around this part of Australia are 23.4 degrees C.

We live in a THOW, so the cabin space is 45 cubic metres. It takes just minutes for the little hydronic heater to make it comfortable in there. It's all about weight and portability for THOWs.

We have an outdoor fireplace, if we want to burn some timber.
camlok
 
  1  
Reply Fri 14 Apr, 2017 03:34 pm
@Builder,
Are you a mobile unit, ie. do you travel a lot? What's your footprint size?
Builder
 
  1  
Reply Fri 14 Apr, 2017 03:36 pm
@camlok,
No, but the THOW is like a spaceship, in that it needs to be mobile.

Still looking for our forever home.

Footprint of the TH is 9 metres by 5, though we also have a 15 by 6 metre workshop area, and a food garden.

camlok
 
  1  
Reply Fri 14 Apr, 2017 08:07 pm
@Builder,
Quote:
Still looking for our forever home.


http://earthship.com/
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