Table 2 Background information about the respondents and their residences
| Â | Respondents | Confidence interval 95% | ||
|---|---|---|---|---|
| Â | N | Â | Lower Bound (%) | Upper Bound (%) |
Location of the residence | Â | Â | Â | Â |
City centre | 181 | 14.0% | 12.1 | 15.9 |
Suburb | 530 | 41.0% | 38.3 | 43.7 |
Fringe area of the city | 154 | 11.9% | 10.1 | 13.7 |
Densely populated area | 203 | 15.7% | 13.7 | 17.7 |
Sparsely populated area, countryside | 225 | 17.4% | 15.3 | 19.5 |
Years in current residence (mean) | 1284 | 13.7 | 13.0 | 14.3 |
Owner-occupied | 990 | 76.0% | 73.7 | 78.3 |
Occupants per unit (mean) | 1312 | 2.3 | Â | Â |
Residence perceived large enough | 1119 | 86.0% | 84.1 | 87.9 |
Planning to move within a year | 221 | 17.4% | 15.3 | 19.5 |
Building characteristics | Â | Â | Â | Â |
Flat roof | 218 | 16.9% | 14.9 | 18.9 |
Basement | 573 | 43.7% | 41.0 | 46.4 |
Energy efficient windows (triple glass or better) | 902 | 69.3% | 66.8 | 71.8 |
Most common types of renovations in the past 12 months | Â | Â | Â | Â |
Roofing | 61 | 4.6% | 3.5 | 5.7 |
Heating system | 61 | 4.6% | 3.5 | 5.7 |
Plumbing/sewage system | 56 | 4.3% | 3.2 | 5.4 |
Pets | Â | Â | Â | Â |
Dog or cat | 433 | 34.1% | 31.5 | 36.7 |
Satisfied or quite satisfied with the indoor air quality | 1169 | 90.1% | 88.5 | 91.7 |
Ventilation | Â | Â | Â | Â |
Mechanical supply and exhaust | 334 | 26.2% | 23.8 | 28.6 |
Mechanical exhaust | 325 | 25.5% | 23.1 | 27.9 |
Natural | 311 | 24.4% | 22.0 | 26.8 |
Primary source of heating | Â | Â | Â | Â |
District heating | 534 | 40.7% | 38.0 | 43.4 |
Electric heating | 377 | 28.7% | 26.2 | 31.2 |
Oil heating | 182 | 13.9% | 12.0 | 15.8 |