Jay C. White Cloud wrote:Wood and sand simply are two vastly different materials and have completely different thermal storage capacities, and physical dynamics. Repeating "advertised" information as "good science," rather than the "comparative advertising" that it is does conversation like this a disservice in my opinion and the information from such companies is "subjective" at its best.
Karen Walk wrote:...Dry sand has a thermal resistance of 4-6.6667 (mK/W). Converted to IP units: 0.576 - 0.96 R-value/inch....
Karen Walk wrote:... Dry sand has a thermal resistance of 4-6.6667 (mK/W). Converted to IP units: 0.576 - 0.96 R-value/inch. For comparison, different types of wood have a thermal resistance varying from 18.18 mK/W for balsa wood to 8.33 mK/W for softwoods and 5.88 mK/W for oak. IP Units: Balsa: 2.6 R-value/inch; Softwoods: 1.2 R-value per inch; Oak: 0.8476 R-value per inch. So dry sand can me MORE thermally resistive than wood!
The government thinks you are too stupid to make your own lightbulb choices. But this tiny ad thinks you are smart:
Greenhouse of the Future ebook - now free for a whilehttps://permies.com/goodies/greenhouse