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Whole House Fan - my most important green upgrade to my home  RSS feed

 
Stephen Grant
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I installed a Whole House Fan in my home to reduce the time I need to run my air conditioning. I recently posted a youtube video on my system to show how it works. A Whole House Fan can be used as an A/C alternative whenever the outside temperature is lower than your inside temperature. It blows the existing air into the attic and draws cooler fresh air through a window into your home.

My Whole House Fan run on a fraction of electricity compared to my A/C. I have a price comparison chart in the video.

If you have questions about Whole House Fans, how much they save you on your electricity bill or install please take a look at my video...
thanks, Boogi

 
Amedean Messan
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Location: Melbourne FL, USA - Pine and Palmetto Flatland, Sandy and Acidic
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Nice video. I have been passively working on alternatives to roof/ceilings in homes given the conventional designs are really silly in principle for hot areas. Essentially you have a very large, typically dark surface area directed to the sun that is poorly circulated. Its a solar oven, no wonder why the cooling costs are so high! House fans do well as a patch remedy for essentially a poor design IMO and that still leaves the root cause of the problem. Ideally, I would want the air to flow naturally to circulate the air but I have not fully settled on the means to achieve this. Current concepts have low air flow rates so I am open to forced convection. Green roofs look promising to me so I am trying to come up with some sort of hybrid green roof with convection cooling.

 
Stephen Grant
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Amedean Messan wrote:House fans do well as a patch remedy for essentially a poor design IMO and that still leaves the root cause of the problem. Ideally, I would want the air to flow naturally to circulate the air but I have not fully settled on the means to achieve this


Agreed. It would be nice to have a house that cools passively.
 
Brian Knight
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Location: Asheville NC
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I use a 20$ box fan in the window. I like it better because I can blow it directly into my bedroom where I want the cool air the most during typical night time flushing hours. I open windows on the other side of the house for exhaust and the best cooling crossflow.
 
wayne fajkus
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Whole house fans and swamp coolers are two useful cooling items you don't see being used anymore.

 
Amedean Messan
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Location: Melbourne FL, USA - Pine and Palmetto Flatland, Sandy and Acidic
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I like to follow sustainable tech. Since you like swamp coolers I HIGHLY recommend considering modern applications of evaporative cooling like Coolerado which I have been following for years. Their product uses up to 1/10th the power of conventional AC units. Best part, it only uses water and electricity with no added humidity and 50% fresh air introduction. Unfortunately the place I live has too much humidity to be much use.





 
wayne fajkus
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Very interesting on the coolerado. I don't understand how high humidity effects it though. Does it slow the evaporative cooling effect?

I have an off grid cabin and this may be viable.
 
Amedean Messan
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Location: Melbourne FL, USA - Pine and Palmetto Flatland, Sandy and Acidic
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Really good question! I have to pull out my thermodynamics textbook to explain the psychrometric chart to do the technical explanation justice (which I am very rusty on). The best I can explain at the moment is that evaporative cooling has higher efficiency in dry air, so if there is more humidity in the atmospheric air then there is less potential for water vapor cooling.

 
He was giving me directions and I was powerless to resist. I cannot resist this tiny ad:
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