Step by step procedure to conduct the Fresh air survey for your building
Fresh air survey is conducted to determine the ventilation requirements of an area in a building. The survey involves measuring the area of the space, the number of occupants, and the required ventilation rate. Here is a step-by-step method to conduct the fresh air survey:
- Determine the area of each space in square feet. Record this information in the “Area” column of the table.
- Count the number of occupants in each space. Record this information in the “Occupants” column of the table.
- Determine the recommended ventilation rate for each space. This is calculated by multiplying the CFM/person and the number of occupants in the space.
Following this step-by-step method, we can conduct the fresh air survey for the occupied areas of a building, as shown in the given table.
| Application | Area(Sq.ft) | Occupants | CFM/person | CFM/Sq.ft | Required ventilation | R1 | R2 | R3 | R4 | R5 | Average Velocity@10% | Fresh air damper in sq.ft | CFM@10% |
| Office Spaces | 3514 | 22 | 6 | 0.6 | 2240 | 758 | 713 | 798 | 752 | 770 | 758 | 5 | 3791 |
| Vacant | 3657 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 0 |
| Office Spaces | 3100 | 29 | 6 | 0.6 | 2034 | 640 | 643 | 775 | 721 | 738 | 703 | 5 | 3517 |
| Office Spaces | 3600 | 21 | 6 | 0.6 | 2286 | 680 | 781 | 766 | 775 | 627 | 726 | 5 | 3629 |
| Office Spaces | 3581 | 19 | 6 | 0.6 | 2263 | 609 | 650 | 698 | 601 | 632 | 638 | 5 | 3190 |
| Office Spaces | 3800 | 25 | 6 | 0.6 | 2430 | 711 | 635 | 619 | 695 | 796 | 691 | 5 | 3456 |
| Office Spaces | 3652 | 32 | 6 | 0.6 | 2383 | 637 | 658 | 793 | 635 | 639 | 672 | 5 | 3362 |
| Office Spaces | 3557 | 25 | 6 | 0.6 | 2284 | 735 | 689 | 727 | 725 | 648 | 705 | 5 | 3524 |
| Office Spaces | 9850 | 52 | 6 | 0.6 | 6222 | 690 | 656 | 675 | 600 | 754 | 675 | 10 | 6750 |
| Office Spaces | 13475 | 127 | 6 | 0.6 | 8847 | 876 | 916 | 858 | 895 | 927 | 894 | 10 | 8944 |