Short answer: The cabinet footprint is only the closed metal box. The working footprint also includes handles, doors, drawers, racks, trolleys, removable filters, service panels and utility connections.
An appliance fits in CAD but cannot be loaded, opened, cleaned or serviced. The common misconception is that width × depth on the data sheet is the space the appliance needs. This article turns that assumption into specific checks that can be recorded on the drawing, survey or commissioning sheet.
Model-specific rule: Every dimension must come from the exact model’s installation documentation. Where gas, electricity, refrigeration, guarded components, hot oil, pressure or safety controls are involved, use the appropriately competent engineer and never bypass a safety device.
Draw every moving part
A plan that shows closed rectangles hides the space used when a door opens or a rack is withdrawn. Opposing equipment can fit perfectly until both are used together.
- Plot door arcs and drawer extension.
- Add rack, tray and trolley withdrawal.
- Test opposing openings at the same time.
Add the maintenance envelope
Filters and panels may need to travel sideways or upwards before they clear the casing. Engineers also need a safe stance, tools and access to isolators.
- Use the manufacturer’s service side.
- Draw the full removal path of the largest part.
- Keep isolation points reachable without dismantling the line.
Include connections and heat rejection
Hoses, valves, cables, drains and ventilation air occupy real space. A cabinet pushed against a wall can kink a drain, strain a connection or recycle hot condenser air.
- Reserve connection and bend-radius zones.
- Separate hot surfaces from vulnerable services.
- Keep air inlets and outlets unobstructed.
What the site evidence may show
| Observation | Hidden issue | Next check |
|---|---|---|
| Cabinet fits on drawing | Door enters aisle | Add the open-door envelope |
| Required gap shown | Panel cannot leave casing | Add component-removal path |
| Unit works before infill | Air or service route is blocked | Test after all closures are fitted |
A practical verification sequence
- Confirm the exact duty and model. Record what the appliance or space must achieve at peak service and use the current model-specific installation information.
- Draw the complete interface. Include moving parts, service/removal access, connections, adjacent equipment and the real operator or trolley position.
- Measure under a representative condition. Static, empty or isolated tests can hide the issue. Record the operating state, value, unit and test point.
- Correct and prove. Repeat the same test after any change and retain the evidence with commissioning or O&M information.
Checks to record:
- Cabinet size.
- handle projection.
- door arc.
- pull-out depth.
- trolley envelope.
- removable-part path.
- service-side clearance..
Define the operational envelope: handles, door arc, drawer/rack pull-out, trolley, filter removal, service panel, utilities, isolators and safe access. The result should be a measurable decision rather than a generic note such as “allow sufficient space” or “services by others”.
Common mistakes to avoid
- Using brochure width and depth as the installed area.
- Leaving service access to the engineer to solve later.
- Drawing trolleys without turning or parking space.
- Allowing decorative panels to cover vents or isolators.
Frequently asked questions
Is working footprint the same as clearance?
No. Clearance is one element; the working footprint includes movement, loading, removal, servicing and connections.
Where do the dimensions come from?
Use the exact model’s current installation and service documentation, supported by a physical check where possible.
Should CAD blocks include open doors?
Yes. Keep closed and operational layers so collisions can be tested without losing the base equipment plan.
Related Kitchen Install Guide reading
- Commercial Kitchen Site Survey Checklist
- Commercial Kitchen Equipment Duty Categories
- How Much Space Should Be Left Around Kitchen Equipment?
Record the installation detail before handover
Use the KIG 318 Commercial Kitchen Installation Checklist to record equipment interfaces, measured conditions, outstanding actions and acceptance evidence.
Sources and further guidance
- RATIONAL: iCombi Pro UK technical data
- Henny Penny: FlexFusion combi installation manual
- Winterhalter: PT Series passthrough dishwasher
- Williams Refrigeration: Operating and installation manual
Last reviewed: 14 August 2026. This article provides general commercial-kitchen design and installation information. It does not replace the exact manufacturer instructions, a site-specific design, risk assessment or work by competent specialists. Stop use and obtain competent help where equipment or services may be unsafe.