| Installation/ equipment | Climate | Technical considerations | Cost | Comments | |||
|---|---|---|---|---|---|---|---|
| Cold | Hot | Assessment/ calculation | Installation/ maintenance | ||||
|
Natural ventilation |
Windows and doors |
no |
yes |
simple |
very simple |
low |
Wind depending. No guarantee on direction intensity and frequency. |
|
Whirly birds |
no |
yes |
very simple |
very simple |
low |
Wind depending (no electricity needed). |
|
|
Chimney |
no |
yes |
very simple |
simple |
medium |
Climate and wind depending. |
|
|
Assisted natural ventilation |
Ceiling, wall and desk fans |
no |
yes |
simple |
simple |
low |
Improve dilution. Needs small energy power. |
|
Extractors/ exhaust fans |
no |
yes |
simple |
very simple |
low |
Small energy power needed. Could be solar power (R&D). |
|
|
Mechanical |
Heating ventilation and air conditioning |
yes |
ideal |
difficult |
difficult |
high |
Relative pressure between rooms. High consumption of energy. Could need filter, HEPA filter and heat exchange. |