# Scottish Passive House: Insights into Environmental Conditions in Monitored Passive Houses
## 4 Results
### Ventilation
However Table 3 indicates the 30% requirement is not met in any of the homes with  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Dwelling**} & \multicolumn{3}{c}{**Normal Fan Speed**} & \multicolumn{3}{c}{**Boost Fan Speed**} \\ \cline{2-9}  & \multicolumn{3}{c}{**Supply**} & \multicolumn{3}{c}{**Extract**} & \multicolumn{3}{c}{**Supply**} & \multicolumn{3}{c}{**Extract**} \\ \hline
**Room** & **(L/s)** & **(m\({}^{3}\)/h)** & **(L/s)** & **(m\({}^{3}\)/h)** & **(L/s)** & **(m\({}^{3}\)/h)** & **(L/s)** & **(m\({}^{3}\)/h)** \\ \hline
**DA1** & 39.89 & 143.60 & 36.72 & 132.19 & 56.97 & 205.09 & 44.91 & 161.68 \\ \hline Living Room & 12.25 & 44.10 & - & - & 20.49 & 73.76 & - & - \\ Bedroom M (s) & 15.06 & 54.22 & - & - & 20.07 & 72.25 & - & - \\ Bedroom 2 (n) & 12.58 & 45.29 & - & - & 16.41 & 59.08 & - & - \\ Kitchen & - & - & 14.06 & 50.62 & - & - & 17.27 & 62.17 \\ Utility & - & - & 5.07 & 18.25 & - & - & 5.93 & 21.35 \\ WC & - & - & 5.68 & 20.45 & - & - & 7.62 & 27.43 \\ Bathroom & - & - & 11.91 & 42.88 & - & - & 14.12 & 50.83 \\ \hline
**DA2** & 28.30 & 101.88 & 25.10 & 90.36 & 33.46 & 120.46 & 33.42 & 120.31 \\ \hline Living Room & 90.06 & 36.22 & - & - & 10.51 & 37.84 & - & - \\ Bedroom M (s) & 9.34 & 33.62 & - & - & 11.37 & 40.93 & - & - \\ Bedroom 2 (n) & 9.90 & 35.64 & - & - & 11.58 & 41.69 & - & - \\ Kitchen & - & - & 4.07 & 14.65 & - & - & 6.07 & 21.85 \\ Utility & - & - & 7.97 & 28.69 & - & - & 9.95 & 35.82 \\ WC & - & - & 5.54 & 19.94 & - & - & 7.44 & 26.78 \\ Bathroom & - & - & 7.52 & 27.07 & - & - & 9.96 & 35.86 \\ \hline
**DB1** & 42.17 & 151.81 & 36.99 & 133.16 & 50.60 & 182.16 & 44.77 & 161.17 \\ \hline Living Room 1 & 7.69 & 27.68 & - & - & 9.01 & 32.44 & - & - \\ Living Room 2 & 11.42 & 41.11 & - & - & 14.38 & 51.77 & - & - \\ Bedroom M (sw) & 6.61 & 23.80 & - & - & 7.94 & 28.58 & - & - \\ Bedroom 2 (se) & 6.07 & 21.85 & - & - & 7.24 & 26.06 & - & - \\ Bedroom 3 (n) & 10.38 & 37.37 & - & - & 12.03 & 43.31 & - & - \\ Kitchen & - & - & 7.54 & 27.14 & - & - & 9.29 & 33.44 \\ Utility & - & - & 7.24 & 26.06 & - & - & 10.23 & 36.83 \\ WC & - & - & 6.82 & 24.55 & - & - & 8.09 & 29.12 \\ Bathroom & - & - & 15.39 & 55.40 & - & - & 17.16 & 61.78 \\ \hline
**DB2** & 41.11 & 148.00 &
\begin{tabular}  
flow rates being approximately 9% less than 130% in DA2, DB1 and TB1, 11% less in DB2 and 9% greater in DA1. In a Passive House it is expected that windows may be opened from time to time through the year. The monitoring of the principal windows in each home indicated occupants in DA1, DA2 and DB1 were frequent window openers (Figure 3). Figure 9 indicates the individual rooms where the windows were most frequently opened. For example, the Master Bedroom windows in DA2 were open for at least 78% of the year, correlating with the occupants' perception of being too hot in the bedroom and their need for additional ventilation. However, the extended window opening will prevent the MVHR system from operating as the design intended. The general window-opening pattern of DB2 and TB1 indicated windows were opened less frequently in these dwellings (Figure 3) but more often in the bedrooms (Figure 9), indicating this could be habitual summer opening and independent of adapting indoor conditions to achieve thermal comfort.