I'd have to yield then. Much cheaper/easier to install "Earth Pipes", which blow fresh air through a pipe that brings it up/down to sub-earth temp, then blows it into the home through a HEPA filter. (~55*F)
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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