The following are man hour reference for ductworks installation such as installation of straight ducts and fittings.
For ventilation ducting material price list:
– Air Louver, please click the link: AIR LOUVER PRICE LIST
– Air Grill, please click the link: AIR GRILL PRICE LIST
– Air Diffuser, please click the link: AIR DIFFUSER PRICE LIST
– Air Damper, please click the link: AIR DAMPER PRICE LIST
– Flexible, spiral, and rectangular duct, please click the link VENTILATION DUCT PRICE LIST
DUCT WORKS INSTALLATION MAN HOURS
Below are the installation man hours for straight duct based on the perimeter dimension of duct and the total area of the duct installed.
For example, you have the following duct to install with dimension, 300mm(height) X 500mm(width) X 10meters(length). The perimeter value of your duct is 1.6 meters, based on the table, the value falls in between of 1.22 and 1.95. For the exact value, you can use interpolation but just to be safe always on your estimation you can use the next higher value which is 1.95. The corresponding value of man hours at 1.95 perimeter for installation is 2.60 hrs per square meter. If you have a total area of 16 sq.m., the total man hours for the installation is 41.6 hrs. If you pay 75Php/hr, the total cost will be Php 3,120.00. To get the actual time for the work to get done, the value 41.6hrs will be divided on how many man-power you have for the installation
STRAIGHT DUCT INSTALLATION
| DIMENSIONS | MANHOURS | ||||
|---|---|---|---|---|---|
| Duct Perimeter | Manhours for Fabrication | Manhours for Installation | |||
| feet | meter | per sq. ft. | per sq.m | per sq. ft. | per sq.m |
| 4 | 1.22 | 0.154 | 1.656 | 0.242 | 2.603 |
| 6.4 | 1.95 | 0.154 | 1.656 | 0.242 | 2.603 |
| 8 | 2.44 | 0.176 | 1.893 | 0.253 | 2.721 |
| 10 | 3.05 | 0.176 | 1.893 | 0.253 | 2.721 |
| 11.2 | 3.41 | 0.176 | 1.893 | 0.264 | 2.840 |
| 12 | 3.66 | 0.187 | 2.011 | 0.286 | 3.076 |
| 14.6 | 4.45 | 0.209 | 2.248 | 0.308 | 3.313 |
| 16 | 4.88 | 0.22 | 2.366 | 0.33 | 3.550 |
| 17 | 5.18 | 0.242 | 2.603 | 0.352 | 3.786 |
| 20 | 6.10 | 0.253 | 2.721 | 0.374 | 4.023 |
| 25 | 7.62 | 0.253 | 2.721 | 0.385 | 4.14 |
| 28.6 | 8.72 | 0.253 | 2.721 | 0.385 | 4.141 |
| 32 | 9.76 | 0.264 | 2.840 | 0.407 | 4.378 |
| 34.5 | 10.52 | 0.264 | 2.840 | 0.407 | 4.378 |
DUCT FITTINGS INSTALLATION
Below are the installation man hours for duct fittings installation. The installation man hours are per piece or per item.
| DIMENSION | MANHOURS | |||||
|---|---|---|---|---|---|---|
| Duct Perimeter | Elbow | Tees | Wyes | Tap-ins | Offset Transition | |
| feet | meter | mnhr/pc | mnhr/pc | mnhr/pc | mnhr/pc | mnhr/pc |
| 4 | 1.22 | 0.297 | 0.462 | 0.528 | 0.297 | 0.385 |
| 6.4 | 1.95 | 0.495 | 0.748 | 0.88 | 0.495 | 0.495 |
| 8 | 2.44 | 0.616 | 0.913 | 1.056 | 0.616 | 0.616 |
| 10 | 3.05 | 0.759 | 1.144 | 1.342 | 0.759 | 0.759 |
| 11.2 | 3.41 | 0.858 | 1.287 | 1.507 | 0.858 | 0.858 |
| 12 | 3.66 | 0.913 | 1.375 | 1.606 | 0.913 | 0.913 |
| 14.6 | 4.45 | 1.1 | 1.65 | 1.936 | 1.1 | 1.1 |
| 16 | 4.88 | 1.221 | 1.815 | 2.134 | 1.221 | 1.221 |
| 17 | 5.18 | 1.287 | 1.936 | 2.266 | 1.287 | 1.287 |
| 20 | 6.10 | 1.518 | 2.277 | 2.662 | 1.518 | 1.518 |
| 25 | 7.62 | 1.903 | 2.86 | 3.322 | 1.903 | 1.903 |
| 28.6 | 8.72 | 2.167 | 3.256 | 3.795 | 2.167 | 2.167 |
| 32 | 9.76 | 2.431 | 3.652 | 4.257 | 2.431 | 2.431 |
| 34.5 | 10.52 | 2.629 | 3.927 | 4.587 | 2.629 | 2.629 |
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