Examples
Examples
Try the starting example
- Filter operating times (hours)
- 0,100,200
- Measured pressure drops (Pa)
- 50,70,90
- User-selected replacement threshold (Pa)
- 150
- Linear pressure trend (Pa/hour)
- 0.2
- Threshold operating time (hours)
- 500
- Projected hours from last observation
- 300
Try another scenario
- Filter operating times (hours)
- [1, 100, 200]
- Measured pressure drops (Pa)
- [50, 70, 90]
- User-selected replacement threshold (Pa)
- 150
- Linear pressure trend (Pa/hour)
- 0.201003
- Threshold operating time (hours)
- 498.336683
- Projected hours from last observation
- 298.336683
Calculation method
Calculation method
Linear pressure trend (Pa/hour)
Least-squares linear pressure trend; project threshold crossing, with no filter-life guarantee.
Threshold operating time (hours)
Least-squares linear pressure trend; project threshold crossing, with no filter-life guarantee.
Projected hours from last observation
Least-squares linear pressure trend; project threshold crossing, with no filter-life guarantee.
Symbols and units
- a
- Filter operating times (hours)
- b
- Measured pressure drops (Pa)
- c
- User-selected replacement threshold (Pa)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- User-supplied measurements and assumptions; Least-squares linear pressure trend; project threshold crossing, with no filter-life guarantee. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.