Overview
ISO 3055:2021 - Kitchen equipment - Coordinating sizes is an international standard that defines coordinating dimensions for domestic kitchen furniture and worktops. It specifies the height, depth and width dimensions needed to integrate common appliances (sinks, ovens, refrigerators, dishwashers, etc.) into modular kitchens. The standard applies to non‑custom, residential kitchens and excludes commercial kitchens (hotels, restaurants, hospitals) and fully bespoke installations.
Key topics and technical requirements
- Coordinating sizes (height, depth, width): The document sets nominal dimensions for worktops and kitchen units to ensure harmonious, modular combinations. It lists standard worktop heights (750, 800, 850, 900 and 950 mm) and addresses the vertical clearance to wall‑hung units and extractor hoods.
- Recesses and installation openings: Definitions and dimension rules for built‑in and built‑under appliances, including recess widths and overall appliance front widths (see the standard’s Tables 1–3). The standard distinguishes nominal sizes and permissible deviations: furniture dimensions allow plus deviations; appliance external dimensions allow minus deviations.
- Worktop details: Definitions for depth, overhang, depth of working area (distance to wall or wall attachment), and provisions for protective wall panelling.
- Unit construction features: Terms and dimensions for feet/base height, plinth, plinth/feet recess, and decorative panels used to match appliance fronts to kitchen furniture.
- Ergonomics and installation guidance: Emphasis on modular coordination, ergonomic selection of worktop height for intended users, and reference to appliance manufacturer installation instructions for safety clearances (e.g., hob-to-hood distance depends on energy source).
- Scope and limits: Does not apply to customised kitchens or commercial kitchens. No normative references are listed in the document.
Applications and who uses it
- Kitchen manufacturers and cabinetmakers - ensure compatibility between units and standard appliances.
- Appliance makers - design appliance external dimensions to fit standard recesses and installation openings.
- Kitchen designers, architects and interior planners - use the standard for space planning, ergonomics and modular layout.
- Installers and contractors - follow recess and clearance dimensions to meet fit‑out and safety requirements.
- Retailers and specifiers - compare component sizes and assemble product sets that interoperate.
Related information
- Prepared by ISO/TC 136 (Furniture). The standard supports modular coordination principles in building and complements appliance installation instructions and local regulations (e.g., gas/electrical/water services and accessibility rules).
Keywords: ISO 3055:2021, kitchen equipment, coordinating sizes, worktop dimensions, kitchen units, built‑in appliances, kitchen design, modular coordination.