Summary

Preliminary visualizations for the air purifier study. Visualizations include normality and boxplot checks.

Descriptive Summary

Summary Statistics of PM 2.5 concentration (µg/m3) by Room (alphabetical).
Site Environment Test Count Mean SD Geo. Mean Geo. SD
Doctors Residence indoor control 1231 3.1 1.6 2 0
Doctors Residence indoor intervention 1067 0.6 0.5 0 1
Doctors Residence outdoor control 1172 3.9 1.4 4 0
Doctors Residence outdoor intervention 1154 3.7 0.7 4 0
Evergreen indoor control 8235 7.2 23.2 1 1
Evergreen indoor intervention 13806 2.1 5.7 0 NaN
Evergreen outdoor control 100 4.7 4.5 4 1
Evergreen outdoor intervention 93 5.8 5.6 4 1
George Pearson indoor control 26606 3.3 2.9 3 1
George Pearson indoor intervention 29410 2.7 3.2 2 1
George Pearson outdoor control 190 6.2 3.9 6 1
George Pearson outdoor intervention 200 6.5 5.1 6 1
Windermere indoor control 1734 3.1 1.3 3 0
Windermere indoor intervention 1868 2.1 1.0 2 0
Windermere outdoor control 20 9.8 6.3 11 1
Windermere outdoor intervention 17 8.2 4.8 7 1

Normality Visualization

All Studies

All study trials and data included (only PM 2.5 recordings). The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots. Outdoor concentrations retrieved from archived PM 2.5 concentration at Vancouver International Airport. All formations of purifiers represented. Doctors Residence used as control environment.

All study trials and data included (only PM 2.5 recordings). The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots. Outdoor concentrations retrieved from archived PM 2.5 concentration at Vancouver International Airport. All formations of purifiers represented. Doctors Residence used as control environment.

Doctors Residence

PM 2.5 concentrations post-purifier installation within controlled environment at VGH campus (Doctors Residence). The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

PM 2.5 concentrations post-purifier installation within controlled environment at VGH campus (Doctors Residence). The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

George Pearson

Evergreen concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.

Evergreen concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.

PM 2.5 concentrations post-purifier installation within long-term care setting. Six purifiers set in scattered and clustered format with PM2.5 concentration readings taken at staff and resident locations. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.

PM 2.5 concentrations post-purifier installation within long-term care setting. Six purifiers set in scattered and clustered format with PM2.5 concentration readings taken at staff and resident locations. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.

Time series for August 23, 2023. Indoor location of sample device at staff and resident sides, and six air purifiers positioned in clustered format. All six air purifiers were turned on at 1246. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.

Time series for August 23, 2023. Indoor location of sample device at staff and resident sides, and six air purifiers positioned in clustered format. All six air purifiers were turned on at 1246. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.

Evergreen

Evergreen Room 154 (Non-MECU) concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at North Vancouver Mahon Park.

Evergreen Room 154 (Non-MECU) concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at North Vancouver Mahon Park.

Evergreen Room 160 & 161 (MECU) concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at North Vancouver Mahon Park.

Evergreen Room 160 & 161 (MECU) concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at North Vancouver Mahon Park.

Evergreen Nursing Station concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at North Vancouver Mahon Park.

Evergreen Nursing Station concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at North Vancouver Mahon Park.

log PM 2.5 concentrations within Evergreen rooms 154, 160, 161, and nursing station. One purifier within resident room. Outdoor PM 2.5 concentrations recorded from North Vancouver Mahon Park station. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

log PM 2.5 concentrations within Evergreen rooms 154, 160, 161, and nursing station. One purifier within resident room. Outdoor PM 2.5 concentrations recorded from North Vancouver Mahon Park station. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

log PM 2.5 concentrations within Evergreen rooms 154, 160, and 161. One purifier (CycloUV) within resident room. Outdoor PM 2.5 concentrations recorded from North Vancouver Mahon Park station. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

log PM 2.5 concentrations within Evergreen rooms 154, 160, and 161. One purifier (CycloUV) within resident room. Outdoor PM 2.5 concentrations recorded from North Vancouver Mahon Park station. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

log PM 2.5 concentrations within Evergreen rooms 154 and 161. One purifier (Novaerus) within resident room. Outdoor PM 2.5 concentrations recorded from North Vancouver Mahon Park station. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

log PM 2.5 concentrations within Evergreen rooms 154 and 161. One purifier (Novaerus) within resident room. Outdoor PM 2.5 concentrations recorded from North Vancouver Mahon Park station. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

Comparison of purifier models. Outdoor PM 2.5 concentrations recorded from North Vancouver Mahon Park station. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

Comparison of purifier models. Outdoor PM 2.5 concentrations recorded from North Vancouver Mahon Park station. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

Time series for November 30, 2023. Indoor location of sample device within medically-enhanced care unit, and one air purifier (Novaerus) positioned at resident-side. Air purifier turned on at 1202. Outdoor concentrations retrieved from archived PM2.5 concentration at North Vancouver Mahon Park station.

Time series for November 30, 2023. Indoor location of sample device within medically-enhanced care unit, and one air purifier (Novaerus) positioned at resident-side. Air purifier turned on at 1202. Outdoor concentrations retrieved from archived PM2.5 concentration at North Vancouver Mahon Park station.

Windermere

Windermere concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.

Windermere concentations by date. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.

log PM 2.5 concentrations within Windermere room 515. One air purifier activated at 1217. Outdoor PM 2.5 concentrations recorded from Vancouver International Airport. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

log PM 2.5 concentrations within Windermere room 515. One air purifier activated at 1217. Outdoor PM 2.5 concentrations recorded from Vancouver International Airport. The box’s centre line represents the median 24-hour concentration. The interquartile ranges (25 and 75 percentile) reach the bottom and top of the box, respectively. The extending vertical lines (whiskers) represent minimum and maximum values. Potential outliers are represented by single dots.

Time series for October 25, 2023. Indoor location of sample device within room 515, and one air purifier positioned at centre. Air purifier turned on at 1204. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.

Time series for October 25, 2023. Indoor location of sample device within room 515, and one air purifier positioned at centre. Air purifier turned on at 1204. Outdoor concentrations retrieved from archived PM2.5 concentration at Vancouver International Airport.