Fit and Clearance Glossary

Actual dimensions: Measurements taken from the physical item itself, as opposed to a listing, drawing or nominal size.
Appliance envelope: The total space occupied by the appliance body plus relevant handles, hinges, feet, connections and required clearances.
Body dimensions: The basic physical width, height and depth of the product, which may exclude projections or operating space.
Clear opening: The unobstructed gap available for an item to pass through when a door, gate or panel is in its usable position.
Clearance: Space intentionally left around an item for ventilation, operation, access, safety, handling or maintenance.
Delivery path: The complete route from the delivery vehicle or building entrance to the item’s final position.
Diagonal: A corner-to-corner measurement. It can help screen orientations but does not prove that a three-dimensional item can pivot through a route.
Fit buffer: An extra allowance chosen for uncertainty, handling and variation. It is separate from required installation clearance.
Installation dimensions: The space required to install and use a product, often larger than its body dimensions.
Nominal size: A category or trade label that may not equal the product’s exact measured size.
Operating clearance: Space required to open doors, drawers, lids, recliners or moving parts and to use the item.
Packaged dimensions: The dimensions of the shipping carton, crate or protective packaging rather than the bare product.
Pivot space: The open area required to rotate or change the orientation of a large item.
Projection: A handle, hinge, control, foot, bracket, hose, cord or other feature extending beyond the main body.
Route fit: Whether an item can pass through every checkpoint between its starting point and final location.
Room fit: Whether an item can occupy and function in its intended room after it arrives.
Service clearance: Space needed for connection, inspection, maintenance or repair.
Smallest checkpoint: The most restrictive point on a route after all relevant dimensions and turning conditions are considered.
Source confidence: A practical assessment of how specific, current, consistent and verifiable a dimensional source appears.
Turning space: The open area required to rotate or change an item’s orientation; irregular furniture does not have one universally reliable radius.