HVAC diffuser throw observation calculator

Calculate interpolated terminal throw and measured coverage length with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use interpolated terminal throw and measured coverage length to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Distance from diffuser (m)
1,2,3
Measured local air speed (m/s)
0.8,0.4,0.15
User-selected terminal velocity (m/s)
0.25
Interpolated terminal throw (m)
2.6
Measured coverage length (m)
2

Try another scenario

Distance from diffuser (m)
[1.1, 2, 3]
Measured local air speed (m/s)
[0.8, 0.4, 0.15]
User-selected terminal velocity (m/s)
0.25
Interpolated terminal throw (m)
2.6
Measured coverage length (m)
1.9
Calculation method

Calculation method

Interpolated terminal throw (m)

Interpolate distance at a user-supplied terminal air speed from a monotonically falling measured profile.

Measured coverage length (m)

Interpolate distance at a user-supplied terminal air speed from a monotonically falling measured profile.

Symbols and units
a
Distance from diffuser (m)
b
Measured local air speed (m/s)
c
User-selected terminal velocity (m/s)

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; Interpolate distance at a user-supplied terminal air speed from a monotonically falling measured profile. 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.
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