Dries coffee inside a tunnel-shaped, plastic-covered structure that traps solar heat, speeds drying and keeps rain off, without burning fuel.
Parabolic dryers are tunnel-shaped, plastic-covered structures that trap solar heat, allow airflow, speed drying and protect the coffee from rain. They use sunlight rather than fuel, sit between open patio or raised-bed drying and powered mechanical dryers such as Guardiola drums, and depend on good ventilation to control heat and humidity.
How it worksCoffee dries inside a tunnel-shaped structure with a plastic cover that traps solar heat, allows airflow and protects the coffee from rain. It is a non-powered, sun-driven method, unlike mechanical dryers that pass heated air through the coffee.
Step by step
- 01
Load parchment or cherry into the covered tunnel.
- 02
Let the enclosed structure trap solar heat while it keeps rain off.
- 03
Manage airflow so heat and humidity stay controlled.
Our notes on Parabolic Dryer Drying are still being checked against their sources, so for now this page shows only the facts we can stand behind.
What can go wrong
- Enclosed structures depend on ventilation to keep heat and humidity under control.
Sources · 2 Every sentence here was checked against a source we read. Taste notes are what guides describe, not promises about your bag. Last revised 2026-09-30. Some details here are less settled than others.
- Coffee Drying Methods Explained: A Guide to Traditional and Mechanical Driers · DR Wakefield
- Coffee processing · Wikimedia Foundation