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12 kilo Diedrich IR-12 - 1991 Model - Amazing Condition - Used

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Contact us, USA 800-999-1600, International +1-650-556-1333

As Solid As They Come!
Another Vintage Diedrich IR-12 Roaster
Comes with Diedrich Pneumatic Loader

Made in USA

Ok. This one has a cool story. I sold this same machine just over a year ago to a good customer who was so stoked to get this classic beauty. He cleaned it up big time, gave it lots of TLC, and roasted on it for about 150 hours. The first picture is current condition. Super clean, right??!!!

It's still commissioned, but ready to disconnect and crate up for shipping. Unfortunate situation has brought current owner in need to sell.

He reports this machine is in beautiful condition and runs perfectly. Loves it, and heartbroken to have to let it go.


This classic maroon 1991 Diedrich IR-12 coffee roaster is in good running condition as the video shows. Lots love these earlier Diedrich machines! Our last one sold just a few months ago to a roastery in Austin Texas to run along side another vintage IR-7. :) How fun!

It was acquired with a roastery purchase, used for about 9 years, then company upgraded to a larger roaster. Average roast during that time was 15 hours a week. It was put in storage at that point. Now wanting to sell. Let’s get this sweetheart back into action!

This IR package comes with a pneumatic loader and 15' of Selkirk double-walled ducting.

Fueled by propane and only has a few aesthetic blemishes. Other than than that, no defects, no issues. Conversion kits to natural gas are available direct from Diedrich.

NOTE: There is the original company name custom painted on drum cover. Current owner simply called the machine "Emerson". Nice!

CONTACT SALES DIRECT @ 650-569-0011 to discuss getting this to your roastery!

All roasters are sold as-is. Crating and Shipping not included in the listed price. 


LOCATION: Southwest Coast USA
LAST USED: Still commissioned
LAST SERVICED: November 2022
FUEL Propane
CAPACITY: 90+ lbs. @ 3-4 roasts p/h
DIMENSIONS: 56 1 /4 x 29 1 /8 x 75 5 /8 in
WEIGHT: 1252
BATCH ROAST TIME: 13-16 Minutes
BTUs: 60,000

Diedrich Coffee Roasters


Diedrich offers more than just exceptional quality coffee roasters which are known for ease-of-use and being state-of-the-art in technology. As an overall company, they pride themselves on and promise exceptional customer service. Diedrich focuses on most everything related to coffee roasters, including installation, maintenance, technical guidance, and complete roasting training.

Whether you’re roasting small or large batches, Diedrich is well-equipped to guide you through a comprehensive collection of topics ranging from basics to professional - all the way through to food safety. 

Diedrich Roasters: Reliable and Repeatable Results. Helping roast masters craft the best tasting coffee worldwide.