A narrower built-in dishwasher format, commonly based on a 45 cm appliance class rather than a 60 cm full-size opening.
Also known as: 45 cm dishwashernarrow dishwasher
A Slimline Dishwasher is a built-in dishwasher designed for a narrower cabinet opening, commonly a 45 cm class instead of a 60 cm full-size unit. In a compact kitchen, that nominal difference can return about 15 cm of cabinet width for a narrow drawer, pull-out, or clearer passage. It also reduces available interior volume. Slimline names the built-in format, including fully integrated, semi-integrated, and under-bench models. It does not identify a countertop appliance or set a place-setting count, noise rating, water use, or cleaning result.
How the narrow format changes a kitchen
The format works like a full-size built-in dishwasher, but its cabinet opening is narrower. Bosch's installation material places integrated units under a worktop or sink drainer, between two units, or at the end of a run. That makes the format useful when a small kitchen has one awkward gap or a fixed service location. The saved width may become a narrow drawer or pull-out, or it may keep the circulation path from tightening around the cabinets.
Door movement still matters. The appliance is narrow when closed, but its door opens into the room. Draw the open position before deciding that the reclaimed cabinet width is usable. The machine also needs room for plumbing, power, leveling, and any furniture panel. Slimline does not mean shallow or free-standing.
A countertop dishwasher is a separate installation format. It may also suit a small kitchen, but it does not use the same cabinet opening and service arrangement. Compare the mounting position and service route rather than using countertop and slimline as synonyms.
The nearest comparison is a full-size 60 cm built-in dishwasher. Both use the same general washing principle. The distinction is nominal opening width and the interior volume that follows from it, not a separate washing method.
Measure the niche against the installation guide
Start with the exact installation guide and the actual clear niche. A cited Bosch 45 cm technical diagram shows an appliance width of 448 mm within a 450 mm nominal class and a 550 mm minimum depth in that installation family. Those figures show how a nominal category relates to one appliance diagram; they are not a universal dimension for every slimline dishwasher. Measure the clear width at the relevant points, then check depth, obstructions, and the room needed for the open door and connections.
Height also needs model-specific checking. Bosch gives an 81.5 to 87.5 cm recess-height range for a standard-height built-in family with adjustable feet. Do not copy that range to another brand or model without its manual. Confirm the appliance height range, the underside of the worktop, the plinth or toe-kick arrangement, the side-to-side leveling range, and whether the selected furniture panel is supplied or must be fitted separately.
Service routing is part of the fit. One Bosch connection diagram identifies hose and cable routing dimensions and notes that some values change when an extension kit is used. Plan from the exact connection drawing rather than assuming a generic hose length or route. Check where the water, drain, and power connections sit relative to the niche. Leave enough room to level the appliance and move it into position without crushing or sharply bending the services.
Weigh capacity against the space saved
Choose a slimline dishwasher when preserving cabinet width or circulation matters more than having the largest available interior. A full-size unit may better suit a household that wants more internal volume, but the research does not support a universal place-setting difference or a fixed number of extra cycles for every household. A 45 cm label alone cannot tell you how often the machine will run or how much hand-washing will result.
Use the exact model's published capacity, rack layout, energy label, noise rating, and water data for that decision. Width alone does not establish cleaning performance, water use, energy use, or noise. A narrow machine that fits the width but blocks a door, leaves a service problem, or cannot accept the planned panel is not a successful compact-kitchen choice.
Avoid common installation mistakes
Measuring only the cabinet face can miss obstructions, the door path, the plinth, or the service route. Ordering by a nominal 45 cm label does not prove that the appliance will fit. Check the complete niche against the exact installation drawing, then compare the model's published capacity and rack arrangement with your dish load.
Do not plan hoses or cables from a generic diagram. Use the model's connection drawing and check whether an extension kit changes the dimensions. Bosch's metric measurements are manufacturer documentation for identified installation families, not North American electrical or plumbing code requirements. Local requirements still govern the installation, so use the applicable professional guidance where needed.
Frequently asked questions
What is a slimline dishwasher?
A slimline dishwasher is a narrower built-in dishwasher format, commonly based on a 45 cm nominal class rather than a 60 cm full-size class. It may be fully integrated, semi-integrated, or under-bench. The term describes the appliance format and cabinet opening, not a guaranteed capacity, noise level, water use, or cleaning result for every model.
How wide is a slimline dishwasher?
The cited Bosch class is nominally 45 cm, and one Bosch technical diagram shows a 448 mm appliance width. Treat those as model-family evidence, not a universal dimension. Measure the exact appliance and the clear niche, including obstructions, leveling space, door movement, and the manufacturer's required clearances before ordering.
Does slimline mean countertop?
No. Slimline usually describes a narrow built-in dishwasher that uses a cabinet opening and connected services. A countertop dishwasher is a separate installation format, even if its capacity is also compact. Compare the mounting position, service route, door movement, and manufacturer's installation instructions instead of using the two terms interchangeably.
Will a slimline dishwasher fit any 45 cm cabinet?
Not automatically. The exact niche must meet the appliance's width, depth, height, leveling, plinth, furniture-panel, door-movement, and connection requirements. One Bosch diagram shows 448 mm width in a 450 mm nominal class, but that does not certify every appliance or cabinet. Use the exact installation guide and measure the clear opening.
Does a slimline dishwasher hold the same as a full-size model?
There is no universal answer from width alone. A narrower format generally changes the available interior volume, but the exact rack layout and published capacity vary by model. Compare the selected machine's capacity, energy label, noise rating, and water data with your household's dish load rather than assuming that every 45 cm unit has the same result.