Lowering Emissivity of Concrete Roof Tile’s Underside Cuts Down Heat Entry to the Building

<div>Daily cumulative heat gain/loss at the building ceiling varies linearly with emissivity: (a) heat gain versus <i>ε</i><sub>b</sub> and (b) heat loss versus <i>ε</i><sub>b</sub>.</div>

Advances in Materials Science and Engineering

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Figure 12

Figure 12: Lowering Emissivity of Concrete Roof Tile’s Underside Cuts Down Heat Entry to the Building 