Abstract

Investigating the impact of averaging period on deriving moisture excess curves

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Abstract

Moisture excess is the difference between the indoor and outdoor absolute humidity. British Standard 5250 presents humidity classes which relate moisture excess to monthly outdoor temperature. These classes are useful for simulations and assessing moisture conditions. Comparisons of measured data with the classes often uses data averaged over shorter periods than a month, but it is unclear what impact the averaging period has on moisture excess. This study examined how hourly, daily, weekly, and monthly averaging influences moisture excess curves. The results show that only weekly and monthly averages produce similar curves, and that longer averaging periods reduce the range of outdoor temperatures captured. These results highlight the importance to specifying the granularity of data when comparing moisture excess.

Keywords: Indoor air humidity, indoor climate, moisture excess, humidity classes

How to Cite:

Ahmed, J. & Altamirano-Medina, H., (2025) “Investigating the impact of averaging period on deriving moisture excess curves”, UCL Open Environment 7(S1). doi: https://doi.org/10.14324/111.444/ucloe.icmb25.a28

Rights: Author, [2025]