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Humidity correction k_h

k_h = 0.9950

kh10.0001h%(20C, teaching)k_h\approx 1-0.0001\,h_{\%}\quad (20^\circ\mathrm{C},\ \mathrm{teaching})

k_h ≈ 0.997 at 50% RH, 20 °C, 101.3 kPa — a 0.3% air-density / W-value mix.

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