Comparing HVAC System Air Flow Methods
| Air Flow Comparison |
TrueFlow Grid |
TESP (External Static Pressure) |
Pressure Matching |
Flow Hood | Traverse | Temp Rise Temp Split |
Indoor Coil Pressure Drop |
|---|---|---|---|---|---|---|---|
| Overall Value |  |
 |
 |
|
 |
|
|
| Recognized by Standard 310 | Yes | Yes | Yes | Yes | No | No | No |
| Residential Accuracy |
 |
 |
|
 |
|
 |
|
| Consistency | |
 |
|
|
|
|
|
| Equipment Cost |
$$$ | $ | $$$$$ | $$$$$ | $$ | $ | $ |
| Time (Min) | 5 to 10 | 5 to 10 | 8 to 15 | 4 to 8 | 15 to 30 | 5 to 20 | 4 to 8 |
- There are several methods for measuring HVAC system air flow.
- For residential HVAC systems, consider the four methods recognized by standard 310 (ANSI/ACCA/RESNET standard for grading new installs).
- When determining overall value, we consider 4 main criteria — Real-world Accuracy, Consistency, Cost and Time.
|
Poor Performance |
|
Best Performance |
| $ | Low Cost (~$150) |
| $$$$$ | Highest Cost ($3000+) |