The Roaster Desk

By Kai Nakamura · Production roaster & equipment editor · Updated 2026-09-21

Diedrich IR-5 vs Giesen W6A

Batch capacity, utilities, and roast-style fit

→ Diedrich IR-5

Diedrich IR-5 wins on installed cost — confirm Giesen dealer support in your region before ruling it out.

Hourly throughput → GiesenAutomation depth → Giesen

Also searched: giesen w6a vs diedrich ir-5

Decision picker

What is your primary constraint?
Batch size you roast most often?
Is gas already permitted on-site?

Specification matrix

Batch capacity

Diedrich IR-5

5 kg

Giesen W6A

6 kg

Heat source

Diedrich IR-5

200,000 BTU/h gas

Giesen W6A

190,000 BTU/h gas

Drum / chamber

Diedrich IR-5

Double-wall IR drum

Giesen W6A

Steel drum

Batch time (typical)

Diedrich IR-5

12 min

Giesen W6A

11 min

Throughput (modelled)

Diedrich IR-5

18.8 kg/h

Giesen W6A

24 kg/h

Street price band

Diedrich IR-5

$62,000 USD

Giesen W6A

$72,000 USD

Exhaust

Diedrich IR-5

500 CFM

Giesen W6A

520 CFM

Lead time

Diedrich IR-5

14 wks — confirm with dealer

Giesen W6A

16 wks — confirm with dealer

Automation

Diedrich IR-5

IR control panel

Giesen W6A

Giesen Software Suite

Service hub

Diedrich IR-5

USA

Giesen W6A

Netherlands

Manufacturer specs and dealer quotes. Throughput model uses SCA 4-minute cooling allowance. Verify all numbers with OEM before purchase.

Strengths & trade-offs

Diedrich strengths & gaps

  • Entry commercial IR
  • Consistent heat transfer
  • Limited batch size for growth

Giesen strengths & gaps

  • Excellent software integration
  • Drum speed control
  • Premium over Asian alternatives

Deep dives

IR radiant heat transfer

Diedrich IR drums radiate through a double-wall — different first-crack timing than convection.

Operators switching from Probat or Giesen need 15–20 calibration batches, not a copied profile.

What to verify with your dealer

Neither OEM publishes binding street prices — quotes move with queue and freight.

FAQ

Looking for giesen w6a vs diedrich ir-5?
Same comparison — Diedrich IR-5 is listed first by convention. Verdict and spec matrix are identical either way.
What throughput can I expect?
Modelled: 18.8 kg/h (Diedrich IR-5) vs 24 kg/h (Giesen W6A) including a 4-minute charge/cool cycle.
What street price should I budget?
Diedrich IR-5: $62,000 USD (As quoted Q1 2026, ex-install). Giesen W6A: $72,000 USD (As quoted Q1 2026, NL factory). Request refreshed quotes — neither includes install.
Which supports Cropster logging?
Diedrich IR-5: Aftermarket probe required. Giesen W6A: Yes with RT bridge — confirm with dealer.

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