Methods 5, 6, & 7: Traverse Methods
{{widget type=”Magento\Cms\Block\Widget\Block” template=”widget/static_block/default.phtml” block_id=”568″}}
Method 5: Pitot Traverse
| Pitot | Rating | Comments |
|---|---|---|
| Overall Value | 
|
Residential systems typically do not have straight duct lengths needed for good results, very time consuming. More useful for “quick checks” of velocity (not accurate) and for commercial flow measurement. |
| Recognized by Standard 310 | No | Not ecognized by ANSI/ACCA/RESNET. |
| Residential Accuracy |
|
If traverse is done correctly with all points and enough straight run, on the order of 15%. |
| Consistency | 
|
Hard to get consistent results in residential across systems and different techs. |
| Equipment Cost |
$$ | Price varies depending on accuracy of manometer/pressure gauge. |
| Time (Min) | 15 to 20 | Time consuming if you follow the standard traverse requirements. Some software available will allow entry of duct cross-sectional area to measure pressure and calculate velocity and CFM. |
Method 6: Mini-vane Anemometer Traverse
| Mini-vane Anemometer |
Rating | Comments |
|---|---|---|
| Overall Value |
|
Residential systems typically do not have straight duct lengths needed for good results, very time consuming. More useful for “quick checks” of velocity (not accurate) and for commercial flow measurement. |
| Recognized by Standard 310 | No | Not ecognized by ANSI/ACCA/RESNET. |
| Residential Accuracy |
|
If traverse is done correctly with all points and enough straight run, on the order of 15%. |
| Consistency |
|
Hard to get consistent results in residential across systems and different techs. |
| Equipment Cost |
$$ | Price varies depending on manufacturer, but typically $600 – $800. |
| Time (Min) | 15 to 20 | Time consuming if you follow the standard traverse requirements. Some software available will allow entry of duct cross-sectional area to measure pressure and calculate velocity and CFM. |
Method 7: Hot-wire Anemometer Traverse
| Hot-wire Anemometer |
Rating | Comments |
|---|---|---|
| Overall Value |
|
Residential systems typically do not have straight duct lengths needed for good results, very time consuming. More useful for “quick checks” of velocity (not accurate) and for commercial flow measurement. |
| Recognized by Standard 310 | No | Not ecognized by ANSI/ACCA/RESNET. |
| Residential Accuracy |
|
If traverse is done correctly with all points and enough straight run, on the order of 15%. |
| Consistency |
|
Hard to get consistent results in residential across systems and different techs. |
| Equipment Cost |
$$ | Price varies depending on manufacturer, but typically $600 – $800. |
| Time (Min) | 15 to 20 | Time consuming if you follow the standard traverse requirements. Some software available will allow entry of duct cross-sectional area to measure pressure and calculate velocity and CFM. |
