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A comment on Heat Pumps Work Miracles. Parent comment

Re:Heat Pumps Work Miracles by throw0101a on Thursday February 28, 2019 @02:56PM (#19274504)
You insulate and air seal properly, then make sure that you bring in outside air in a controlled fashion (enough CFM, filtered, etc):

* https://www.youtube.com/watch?v=CIcrXut_EFA

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