Raw data, Elaboration, and codes for the paper "Reassessing the energy performance of ventilation air filters with ultrafine aerosol aging"

This repository contains all raw data and elaborations used to produce results for the manuscript: "Reassessing the energy performance of ventilation air filters with ultrafine aerosol aging"Table below provide a detailed description of each file. Filename Description "all_raw_number_distributions.csv" Scan-resolved particle number-size distributions extracted from the original MAT files. The file is provided in long format and contains the instrument identifier, equivalent-diameter definition, source MAT file, scan number, particle diameter, and differential number concentration in #/cm³. PSD1 corresponds to the NanoScan SMPS 3910 and is expressed in terms of electrical mobility-equivalent diameter, whereas PSD2 corresponds to the OPS 3330 and is expressed in terms of optical-equivalent diameter. No outlier exclusion is applied in this file. "raw_mass_distributions.csv" Scan-resolved differential particle mass-concentration distributions derived from the measured number-size distributions. The file contains the instrument identifier, equivalent-diameter definition, source MAT file, scan number, and particle diameter. Mass concentration was calculated assuming spherical particles and a particle density of 1.984 g/cm³. To avoid double counting in the instrumental overlap region, PSD1 data were used below 350 nm and PSD2 data at and above 350 nm. Despite the file name, these values are derived from the measured number concentrations and are not direct gravimetric measurements. "PSD1_number_statistics_without_outliers.csv" Summary statistics of the NanoScan SMPS 3910 number-size distributions after PSD1 shape-outlier removal. The file reports equivalent diameter, sample variance, mean, and sample standard deviation on a common logarithmic diameter grid for the retained PSD1 scans. "PSD2_number_statistics_without_outliers.csv" Summary statistics of the OPS 3330 number-size distributions after exclusion of the scans paired with PSD1 outliers. The file reports equivalent diameter, mean, sample variance, and sample standard deviation on a common logarithmic diameter grid. PSD2 scans were not independently screened for outliers; their exclusion follows the simultaneous PSD1/PSD2 pairing. "PSD1_mass_statistics_no_outliers.csv" Summary statistics of the PSD1-derived differential mass-concentration distributions after PSD1 shape-outlier removal. The table reports equivalent diameter, mean, sample variance, and sample standard deviation for retained scans, using the same spherical-particle and density assumptions adopted for the complete dataset. "PSD2_mass_statistics_no_outliers.csv" Summary statistics of the PSD2-derived differential mass-concentration distributions after exclusion of the scans paired with PSD1 outliers. The table reports equivalent diameter, mean, sample variance, and sample standard deviation for the retained simultaneous measurements. "UF-KCl_Clogging_raw_data.zip" The compressed archive contains the original raw data acquired during the UF-KCl filter-clogging tests, in which KCl aerosol was generated by burning KCl sticks upstream of the tested filters. Each file corresponds to one tested filter and contains the recorded filter pressure-drop evolution, the initial and final mass of each burned stick, the mass of the ash residues, and the initial and final mass of the tested filter. The files provide the primary experimental data used for the subsequent calculation of particle mass fed to the filter, filter mass increase, and pressure-drop growth during loading. "Statistical_analysis_auditable.xlsx" Summary of every statistic reported in the manuscript and Supplementary Information, computed by live formulas. "coag_auditable_final.xlsx" Auditable Brownian-coagulation calculation comparing the measured aerosol PSD with the estimated PSD reaching the test filter, accounting for the differential residence time between the sampling line and test duct. Includes residence-time reconstruction, Hinds-based sectional coagulation modeling, verification against the TSI number export, and sensitivity checks.