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Engineering · L3 · Finding Total R-Value and Heat Loss

The step-by-step process for combining stacked insulation layers into a total R-value and then finding the resulting rate of heat flow through a wall.

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🧱 Identify each material layer in the wallLook up each layer's R-valueAdd layers in series: R_total = R1 + R2 + R3Know area A and ΔT?🔥 Compute Q/t = A·ΔT / R_totalMeasure or specify A and ΔT first✅ Compare to code minimum or targetMeets target?Add or upgrade a layer, recompute❄️ Design acceptedYesNoNoYes

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