Table 1.
Description of sampling sites
| Concentration of indoor PM2.5 (µg/m3) | House type | Residency year | Sampling place | House-holds area (m2/room number) | Family members | Heater type | Ventilation per day | Heating time per day | Cooking per day | Nearby outdoor PM source | Tobacco smoke | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HH-1 | 107.2 | Fired clay brick | 12 | Living room | 60/3 rooms | 5 | Stove | – | Coal, processed coal and wood/4 | 3 | Next to main road | No |
| HH-2 | 320.7 | Breeze-block | 12 | Living room | 27/2 rooms | 7 | Stove | 1 | Coal, processed coal and wood/3 | 1 | Main road, unpaved road | No |
| HH-3 | 176.5 | Fired clay brick | 7 | Living room | 64/3 rooms | 5 | Electric/stove | 1 | Coal, processed coal and wood/6 | 2 | Next to unpaved road | No |
| HH-4 | 137.2 | Breeze-block | 10 | Sleeping room | 71/2 rooms | 8 | Stove | 2 | Coal, processed coal and wood/2 | 3 | Next to unpaved road | No |
| HH-5 | 93.6 | Fired clay brick | 4.5 | Living room | 31.15/1 room | 5 | Stove | – | Coal, processed coal and wood/3–4 | 3 | Next to mini power plant, main road | No |
| HH-6 | 324.8 | Fired clay brick | 45 | Living room | 160/2 rooms | 7 | Electric/ stove | – | Coal, processed coal and wood/- | 2 | Unpaved road | No |
| HH-7 | 214.6 | Clay and breeze-block | 40 | Living room | 24/1 room | 6 | Stove | – | Coal, processed coal and wood/3 | 1 | Next to mini power plant, main road | No |
| HH-8 | 246.2 | Fired clay brick | 10 | Living room | 18/1 room | 6 | Stove | – | Coal, processed coal and wood/4 | - | Unpaved road | No |
| HH-9 | 62.8 | Breeze-block | 26 | Living room | 104/3 rooms | 9 | Electric/ stove | – | Coal, processed coal and wood/3 | 2 | Next to unpaved road | No |
| HH-10 | 142.8 | Breeze-block | 50 | Kitchen room | 32/1 room | 3 | Electric/ stove | – | Coal, processed coal and wood/2 | 2 | Next to unpaved road | No |