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This article provides excellent information about maximizing thermal mass: Phase Change Materials (PCMs): There is growing interest in the use of PCMs as a lightweight thermal mass substitute in construction. All materials require a large energy input to change state (i.e. from a solid to a liquid or a liquid to a gas). This energy does not change ...


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One boringly unexciting approach is double drywall (and don't choose the lightweight type) though that is more often done when building or rebuilding/remodeling than as a retrofit without some other rebuilding/remodeling going on. It easily and unobtrusively adds a significant mass to the interior structure. Bang for the buck, and in most cases pound for ...


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I have about 50 55-gallon drums stacked in my basement, all filled with water. They are stacked one on top of the other (bottom row/top row) along our north basement wall. I have two in floor-mounted fans, one pushing, one pulling, mounted in the ground-floor joist cavity (from above they just look like floor mounted cold air returns). During the day, the ...


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The only good solution to for this that I know of is pumped geothermal heat storage. In this system, a thermal well us used to store heat underground, and a heat pump is used to move energy between the house and the ground. Theoretically, if your local geology permits it, this lets your air conditioning during the summer store heat that can be recovered ...


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5/8" drywall on 24-inch centers is standard practice across the industry. Unless you have some weird early-version panels with poor sag resistance, 15" of cellulose will not cause a problem. I'm with Daniel Griscom, however. R-49 is in the ballpark of what we install in new homes here in frigid Minnesota (regularly seeing -30F in the winter). It's almost ...


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It works for sure,especially on metal roofs. When continiously sprinkling a metal roof the roof works like a heat exchanger. You are carrying heat away faster than it comes :)



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