TECHNOLOGY

Smart Buildings Need Smart Data Fixes

Aachen, GermanyThu Nov 13 2025
Modern buildings are becoming more intelligent, with sensors monitoring various aspects like temperature and air quality. However, these sensors often fail to capture all necessary data, leading to gaps that can disrupt building management efforts. Researchers recently developed a clever solution to this problem. They trained three types of autoencoder neural networks to fill in missing data points. These networks act like data detectives, reconstructing incomplete information. The data used in the study came from an office building in Aachen, Germany, collected over four years from 84 rooms. The focus was on indoor air temperature, relative humidity, and CO2 levels. The results were promising. The models outperformed traditional methods, reconstructing data with high accuracy. The error rates were low: 0. 42 degrees Celsius for temperature, 1. 30% for humidity, and 78. 41 parts per million for CO2 levels. This accuracy is crucial for effective building management. Accurate data is essential for optimizing building operations. It helps maintain comfortable environments, reduce energy consumption, and ensure good air quality. By filling in the data gaps, these models can significantly improve building management. However, these models are not flawless. They work best with certain types of data and may need adjustments for different scenarios. Despite this, they represent a major advancement in making buildings smarter and more efficient.

questions

    What are the potential biases in the data set used to train the autoencoder neural networks, and how might they affect the reconstruction of missing data?
    If the autoencoder neural networks could talk, what would they say about the missing data they are trying to reconstruct?
    Could the missing data in the building's time-series be intentionally removed to hide certain activities or events?

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