How will the use of a Thermastor dehumidifier affect the temerature of a superinsulated basement?
Facts: The house in question is (3) story 4,800 sqft, designed with R-43 walls, R-60 ceiling, R-29 basement (where sub grade, the rest is R-43 at walk-out) and sub slab insulation is R-19. The slab is to be 4-inch. The location is Newbury, NH (Zone-6) I would like to address summer time humidity concern by installing a Thermastor (“Sante Fe”) unit in the basement Utility Rm. My son, who works for Thermastor has a similar set up in his Madison, WI house and he observed 70% humidity at the 2nd floor was reduced to 50% within a day (maybe less). The Sante Fe unit runs with a drain and the basement (normally cool anyway) absorbs the heat generated by the unit. My question is in regard to the potential for the slab assembly in the house mentioned above to absorb and mitigate the heat generated? Given the sub slab insulation, will this cause the basement to heat up? I could be wrong but was told that 1pint of water removed eqautes to 1000 btu of heat.
I don’t want to reduce the overall under slab insulation but would it be wise to do so in the Utility Rm. where the SanteFe is located. As an aside, the utility Rm is 13′-3″ below grade, deeply set below the Winter’s cold outside ambient air.
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