Figure 1.
![Scheme of the plan of Warsaw with aeration corridors; developed on the basis of [14]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6470714071e4585e08a9d3c5/j_acee-2022-0016_fig_001.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T021757Z&X-Amz-Expires=3600&X-Amz-Signature=c17f8df0883624f2e726d6d86b386dc275a62553e56a35b50fdaee5049ef2b1e&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 2.
![Scheme of the ventilation tower (left) and the ventilation chimney (right); developed on the basis of [17]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6470714071e4585e08a9d3c5/j_acee-2022-0016_fig_002.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T021757Z&X-Amz-Expires=3600&X-Amz-Signature=66fc5a0afa3c120faa5d1cad09eb84ef57bdfec9c54d49ccffe310d9f21699a1&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 3.
![Plan of Cracow with aeration corridors (in blue) and a diagram of the operation of ventilation towers (circulation is marked with arrows), and the potential location of ventilation chimneys (marked with black circles); developed on the basis of [15, 17]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6470714071e4585e08a9d3c5/j_acee-2022-0016_fig_003.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T021757Z&X-Amz-Expires=3600&X-Amz-Signature=ff0f3a9c68f03cfea5b351a8239a83587293775ac25e19cabd25ea6f65450762&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 4.
![Scheme of operation of the smog tower in New Delhi; developed on the basis of [18]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6470714071e4585e08a9d3c5/j_acee-2022-0016_fig_004.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T021757Z&X-Amz-Expires=3600&X-Amz-Signature=bffc1adb2bdf3c282db76c584b1d9d402eec9eed4469c7b6a0e3c086fb1d12b4&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 5.
![Diagram of aeration corridors operation with hot north-westerly winds (top left) and cooler east winds (bottom left); ventilation diagram of the space between buildings (right); developed on the basis of [3]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6470714071e4585e08a9d3c5/j_acee-2022-0016_fig_005.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T021757Z&X-Amz-Expires=3600&X-Amz-Signature=c82cf566860c15f6a6c1c85c2988483c67046324b2c1440814b9568008ac968a&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 6.
![Diagram of the wind flow through the structure of quarter buildings in Jätkäsaari; developed on the basis of [3]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6470714071e4585e08a9d3c5/j_acee-2022-0016_fig_006.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T021757Z&X-Amz-Expires=3600&X-Amz-Signature=9fbd0c70481513f769607f05cf97fd59360eb7205cfb109d46814234da2358fe&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Spatial features and elements that influence urban ventilation processes, along with sources in the literature; a study by the authors
| Spatial feature/element | Model | Literature | |
|---|---|---|---|
| 1 | Aeration corridors (aerosani tary corridors) | Daniels, K. (1998), Błazejczyk K., Kuchcik M., Milewski P. and others (2014), Mabon L, Kondo K., Kanekiyo H., Hayabuchi Y., Yamaguchi A. (2019) | |
| 2 | Orientation of the street layout | Gandemer J. (1978), Oke T.R.(1988), Bottema M. (1993), Daniels K. (1998), Krautheim, M., Pasel, R., Pfeiffer, S.,&Schultz-Granberg, J. (2014) | |
| 3 | Compactness, formation of closed interiors | Hussain M., Lee B. E. (1980), Oke T. (1988),Bottema M. (1993), Daniels, K. (1998),Krautheim, M., Pasel, R., Pfeiffer, S.,&Schultz-Granberg, J. (2014) | |
| 4 | Building development porosity | Priyadarsini R., Wong N.H. (2005), Krautheim, M., Pasel, R., Pfeiffer, S. &Schultz-Granberg, J. (2014), Yuan C. (2018) | |
| 5 | Forms that support vertical ventilation - chimneys, towers | Priyadarsini R., Wong N.H. (2005), Flaga A., (2018), Guttikunda S, Jawahar P (2020) |
Synthesis of the analysis of 5 cities in terms of ventilation strategies that take advantage from the building development shape; C – conditions, S – solutions; a study by the authors
| City | Warsaw | Cracow | New Dehli | Masdar City | Helsinki - Jätkäsaari | |
|---|---|---|---|---|---|---|
| C | Climate | Continental humid | Continental humid | Subtropicalhumid | Desert | Continental humid |
| Area | 517 km2 | 327 km2 | 1483 km2 | 6 km2 | 0.68 km2 | |
| Population | 1.8 mln | 0.8 mln | 26 mln | 0.05 mln | 0.018 mln | |
| Erectionprocess | gradual | gradual | gradual | from scratch | from scratch | |
| Mainconcern | UHI, smog | smog, UHI | smog | UHI, smog | UHI, smog | |
| S | Corridors | + | + | - | + | - |
| Direction | - | - | - | + | + | |
| Compactness | - | - | - | + | + | |
| Porosity | - | - | - | + | + | |
| Verticalelements | - | + | + | + | - | |