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| Chinese National Standard Category: Environmental sanitation |
| English Title: | Ecological negative oxygen ion concentration Levelof the indoor livable environment |
| Chinese Title: | 室内环境生态负（氧）离子浓度等级 |
| Standard No.: | T/GIEHA 012-2019 |
| Category No.: | C51 |
| Issued by: | GIEHA |
| Issued on: | 2019-07-09 |
| Implemented on: | |
| Status: | valid |
| Superseded by: | |
| Superseded on: | |
| Abolished on: | |
| Superseding: | |
| Word Count: | 3500 words |
| Similar Standards: | GB 17051-2025 WS/T 10037-2025 WS/T 10038-2025 GB/T 17219-2025 GB/T 18204.6-2025 GB/T 18204.5-2025 GB/T 18204.2-2025 GB/T 18204.3-2025 GB/T 18204.4-2025 GB/T 18204.1-2025 GB 19053-2024 GB/T 17216-2025 GB/T 11730-2025 GB/T 9981-2025 T/CASNHP 8-2025 T/ZGM 002-2025 T/ZGM 001-2025 DB32/T 4967-2024 DB32/T 4903-2024 GB/T 43685-2024 |
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