HVAC rectangular service clearance margins calculator

Calculate width margin and height margin with your own figures.

Your numbers

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

Use width margin and height margin to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Available service width (mm)
1000
Required manufacturer service width (mm)
800
Available service height (mm)
2000
Required manufacturer service height (mm)
1800
Width margin (mm)
200
Height margin (mm)
200
Smallest clearance margin (mm)
200

Try another scenario

Available service width (mm)
1001
Required manufacturer service width (mm)
800
Available service height (mm)
2000
Required manufacturer service height (mm)
1800
Width margin (mm)
201
Height margin (mm)
200
Smallest clearance margin (mm)
200
Calculation method

Calculation method

Width margin (mm)

Available clearance minus user-entered manufacturer requirement in each dimension; no regulatory clearance lookup.

Height margin (mm)

Available clearance minus user-entered manufacturer requirement in each dimension; no regulatory clearance lookup.

Smallest clearance margin (mm)

Available clearance minus user-entered manufacturer requirement in each dimension; no regulatory clearance lookup.

Symbols and units
a
Available service width (mm)
b
Required manufacturer service width (mm)
c
Available service height (mm)
d
Required manufacturer service height (mm)

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; Available clearance minus user-entered manufacturer requirement in each dimension; no regulatory clearance lookup. 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.

Share this page
Share this calculator

Leave unchecked to share the page without your entered values.