High-pressure washer Karcher K 5 Smart Control Flex eco!Booster — 1400 W, 145 bar, 500 l/h, 10m flex hose

The Karcher K 5 Smart Control Flex eco!Booster (model 1.324-739.0) is a high-pressure washer for demanding home and light professional cleaning tasks. It combines an LCD-equipped Smart Control gun with adjustable pressure and detergent dosing, an eco!Booster mode to reduce water and energy consumption, and a flexible PremiumFlex high-pressure hose for easier maneuvering. The set includes a three-in-one Multi Jet rotary nozzle that offers three spray types and a Quick Connect fitting for simple attachment of the high-pressure hose and accessories.

Advantages

The unit offers precise pressure adjustment and on-gun detergent control via an LCD display and buttons, plus a Boost mode for extra cleaning power when removing stubborn dirt. The PremiumFlex hose improves mobility and resists kinking, while Bluetooth connectivity to the Kärcher Home & Garden app provides guidance on optimal water pressure and step-by-step cleaning support. Quick Connect and Plug 'n' Clean compatibility simplify accessory and detergent changes.

Suitable for

• Cleaning patios, driveways and terraces
• Washing cars, bicycles and garden machinery
• Removing moss, algae and medium to heavy dirt from facades and fences
• Regular maintenance of outdoor surfaces and equipment

When it may not be suitable

This pressure washer is designed for demanding household and light professional use; it may be more powerful and feature-rich than needed for occasional, very light cleaning tasks. For large industrial-scale cleaning or continuous heavy-duty use, a commercial-grade machine with higher continuous duty ratings may be more appropriate.

Key specifications

• Voltage: 230 V, Frequency: 50 Hz
• Pressure range: 20 – max. 145 bar (2 – max. 14.5 MPa)
• Maximum flow rate: 500 l/h
• Cleaning performance area: up to 40 m²/h
• Max. inlet water temperature: 40 °C
• Rated input power: 2.1 kW
• Power cable length: 5 m
• Weight without accessories: 13.2 kg; weight with packaging: 16.8 kg
• Dimensions (L × W × H): 405 × 306 × 584 mm
• Color: yellow

How to use

Connect the Quick Connect high-pressure hose to the gun and the machine, attach the Multi Jet nozzle and choose the required spray pattern. Use the LCD display and buttons on the Smart Control gun to set the desired pressure and detergent dose. For stubborn dirt, activate the Boost mode to increase cleaning power. When using detergent, apply via the Plug 'n' Clean system and follow the detergent manufacturer’s instructions. After use, rinse the nozzle and hose, switch off the unit, and store accessories in the integrated accessory mesh.

What to consider before purchase

• Intended frequency and intensity of use (home vs. continuous professional use)
• Required pressure and flow for your cleaning tasks
• Compatibility of detergents with the Plug 'n' Clean system
• Need for Bluetooth app guidance and mobile device connectivity

Usage recommendations

For efficient and safe cleaning, start with a lower pressure setting and increase only if necessary; use Boost mode sparingly for particularly stubborn dirt. Keep the nozzle at a safe distance from delicate surfaces, and follow the Kärcher app guidance for optimal pressure and detergent recommendations.