Window Air Exchange - [source code]
Air exchange through an open window (Maas 1995) and the steady-state CO2 it supports.
Input
| Name | Nickname | Description | Type |
|---|---|---|---|
| Opening Area | A | Effective free opening area (m2). | Number |
| Wind Speed | U | Outdoor wind speed at 10 m (m/s). | Number |
| Sash Height | H | Height of the openable sash (m) — drives the buoyancy term. | Number |
| Temp Difference | dT | Indoor minus outdoor air temperature (K). Sign is ignored. | Number |
| Room Volume | V | Room volume (m3), for air changes per hour. | Number |
| CO2 Rate | Q | CO2 generation per occupant (L/s) — see the Occupant CO2 component. | Number |
| Occupants | N | Number of occupants. | Integer |
Output
| Name | Nickname | Description | Type |
|---|---|---|---|
| Flow | Fl | Air exchange through the opening (m3/h). | Number |
| Air Changes | ACH | Air changes per hour. | Number |
| Steady CO2 | C | Steady-state indoor CO2 (ppm) at that flow and occupancy. | Number |