The Giesen W45A Pro is a fully automated, high-capacity coffee roaster built for consistent large-scale production. The W45A Pro automates every stage of the roast—from loading to cooling. Designed for roasteries that demand reliability, repeatability, and full process control, the W45A Pro delivers industrial performance without compromising on quality.
W45A Pro
- Up to 45 kg per batch | 225 kg per hour
- Robust and reliable construction
- Fully customizable

Up to 24 kg / h.
With a 6-kilo capacity per batch and up to 24 kilos per hour, Giesen W6 series roasters deliver efficiency and consistency. Perfectly balanced for professionals who demand both quality and volume.
The ultimate centerpiece for your coffee shop. Designed to perfection, it offers the flexibility of full-control manual roasting alongside the convenience of fully automatic roasting. Handcrafted in the Netherlands and shipped worldwide.

High capacity, full automation
Designed for wholesale operations, the W45A Pro handles batch sizes from 22.5 to 45 kg, achieving up to 225 kg of roasted coffee per hour. Its fully automated system streamlines the roasting process—from automatic green bean loading to precise roast profiling and rapid cooling—minimizing manual intervention and maximizing throughput.

Advanced roast profiling for consistent quality
Equipped with Giesen Profiler, the W45A Pro allows operators to design and store detailed roast profiles, ensuring each batch meets exact flavor and quality standards. This automation enhances consistency across productions, enabling you to deliver a uniform product that aligns with your brand reputation.

Measurements
4591 x 2527 x 2964 mm
Weight
On request
Minimum batch size
22,5 kg
Maximum batch size
45 kg
Sound level
70 dB (A)
Chimney diameter
Ø 200 mm roast fan
Ø 300 mm cooling fan
Underpressure range
100 - 170 Pa
(130 Pa default)
Drum speed range
37 - 52 Hz
(47 Hz default)
Temperature setpoint range
100 - 250 °C
(200 °C default)
Standard certifications
CE marked
Destoner
Coffee Conveyor
Pellet Press
Catalytic Emission Cleaner
Thermal Emission Cleaner
Supply voltage
400V AC
External fusing
3 x 32A
Maximum electrical power
9,7 kW
Gas connection
G 1" propane gas
G 3/4" natural gas
Maximum gas consumption
G20 - 12,5 m³/h
G25 / G25.3 - 10,6 m³/h
G30 - 4,2 m³/h
G31 - 2,2 m³/h
Gas inlet pressure
G20 - 25 mbar
G25 / G25.3 - 20 mbar
G30 - 30 / 37 / 50 mbar
G31 - 30 / 29 / 50 mbar
Technical data.
If you need any further technical information that you can't find on this page, please contact us. We will be happy to help you!
Giesen roasters combine advanced temperature control with cutting-edge automation, ensuring consistency and ease in every roast. With features like automatic mode and burner percentage control, you have the tools to master your craft and achieve unparalleled results.
Giesen roasters feature advanced airflow control, allowing you to fine-tune the roasting environment to achieve your desired flavor profiles. By adjusting the underpressure settings, you can influence the heat transfer and development of your beans.
Measurements
W6A - 1427 (L) x 723 (W) x 1705 (H)
W6E - 1410 (L) x 723 (W) x 1705 (H)
W6A Pro - 1623 (L) x 2414 (W) x 1944 (H)
Weights
W6A - 485 kg (roaster only)
W6E - 496 kg (roaster only)
W6A Pro - 600 kg (roaster only)
Minimum batch size
W6A - 3 kg
W6E - 3 kg
W6A Pro - 3,5 kg
Maximum batch size
W6A - 6 kg
W6E - 6 kg
W6A Pro - 7 kg
Sound level
W6A - 70 dB (A)
W6E - 70 dB (A)
W6A Pro - 70 dB (A)
Supply voltage
W6A - 230V AC (1L+N+PE)
W6E - 400 V AC (3L+N+PE)
W6A Pro - 230V AC (1L+N+PE)
External fusing
W6A - 1 x 16A
W6E - 3 x 32A
W6A Pro - 1 x 16A
Max. electrical power
W6A - 1,7 kW
W6E - 17 kW
W6A Pro - 2,5 kW
Keep in mind that this is the absolute maximum power consumption. Actual average usage will be much lower.
Underpressure range
80 - 150 Pa (min. - max.)
Default value: 110 Pa
Drum speed range
36 - 51 Hz (min. - max.)
Default value: 46 Hz
Temperature setpoint range
100 - 250 °C (min. - max.)
Default value: 200 °C