Thread: DIY ventilation heat exchanger
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Old 09-29-11, 03:26 PM   #121
AC_Hacker
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Default Pop-Sci DIY HRV (1986)
Plans from a 1986 Pop-Sci... they're still readable.

-AC_Hacker

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Last edited by AC_Hacker; 11-18-11 at 12:04 PM..
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