The following are man hour reference for ductworks installation such as installation of straight ducts and fittings.
When estimating the labor component of any HVAC project, knowing the typical duct installation man-hours is essential. This data helps engineers, contractors, and project managers accurately plan schedules, manpower, and costs. Furthermore, it supports more reliable budgeting and bidding—especially for large-scale projects.
Why Use Man-Hour Estimates?
A man-hour estimate represents the average time it takes one worker to complete a specific task under normal working conditions. In the case of ductwork, this can include:
- Fabricating and assembling duct sections
- Installing hangers and supports
- Mounting ducts at various elevations
- Sealing joints with gaskets or mastic
- Insulating or cladding ducts (if required)
In addition, standardized man-hour data allows for easier benchmarking between projects and helps identify areas for improvement in crew efficiency.
Factors That Influence Installation Time
Several variables can affect how long it takes to install ducts:
- Duct size and material (GI sheet, stainless, flexible)
- Installation height and accessibility
- Presence of insulation or fire wrapping
- Complexity of layout (number of elbows, offsets, transitions)
- Availability of tools and equipment
- Skill level of workers
As a result, projects with high ceilings or dense duct networks may require significantly more hours than standard horizontal runs in accessible areas.
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 |
Conclusion
In summary, using accurate duct installation man-hour references allows HVAC professionals to improve project planning, labor forecasting, and bidding precision. While actual productivity will vary based on site conditions and crew experience, these benchmarks serve as a valuable starting point.
Therefore, integrating man-hour data into your estimating tools and workflows will help you deliver projects on time and within budget.
HELP US!
We want to improve this website so we need your help. Please send us your recommendations, suggestion, and request. Click this for the SUGGESTION FORM PAGE.
Dont forget to hit Like and Share if this blog helped you.
FOLLOW US!
Please like and follow our facebook page for social media updates.
https://www.facebook.com/theprojectestimate
Please check this post for more reference: