How Loring’s S35 Kestrel Solves Roasting’s Toughest Problems

If you’ve ever wrestled with inconsistent roast profiles, soot-stained ducts, or the endless hassle of clearing chaff buildup, you’re not alone. Traditional coffee roasters force roasters to choose between flavor integrity and operational headaches—until now.

The Loring S35 Kestrel solves two longstanding problems in one machine: it eliminates smoke entirely and gives roasters pinpoint control over every roast, all while using 80% less energy than conventional roasters.

What Makes the Loring S35 Kestrel Different?

The Loring S35 Kestrel is a 35 kg (77 lb) capacity coffee roaster, capable of running batches as small as 7 kg (15 lb). In an 8-hour shift, it can roast up to 1,000 kg (2,000 lb), adding up to 300 metric tons annually under a 40-hour/week, 52-week schedule. But its real revolution lies in how it roasts—not just how much.

Flavor-Lock Roast Process™: The Patent Behind the Performance

The roaster’s secret weapon is the Flavor-Lock Roast Process™, a patented closed-loop system that removes oxygen from the roasting chamber while maintaining ideal humidity levels. This “closed” environment not only ensures no smoke escapes, but also boosts bean development, leading to higher outturn yields and cleaner cup profiles. The single-burner design guarantees smokeless roasting, while computer-controlled precision lets roasters replicate identical roast curves batch after batch.

Roast durations range from under 10 to over 16 minutes, with real-time roast profile capture and download for quality tracking. A high-speed cooling cycle halts over-development (“baking”) and locks in volatile aromatics. Every parameter is managed via an intuitive touchscreen interface, with optional remote control via iPad or smart device. Parametric PLCs ensure absolute control over green bean input, roasted discharge, and cooling tray functions. A built-in bean trier and true-color inspection lamp aid in quality assessment.

How It Works: Smokeless, Seamless, Smart

Loring achieves smokeless roasting through a unique chaff and dust separation system. Instead of venting smoke outside, it incinerates silver skin (chaff) completely, eliminating the need for cleaning the collector and reducing fire risk. Smoke itself is converted into high-temperature water vapor and recirculated back into the roasting chamber. This closed thermal loop means no oxygen-rich exhaust, no oily duct buildup, and—crucially—no external smoke emission. What exits the machine is minimal excess heat, with no soot or residue on the exhaust stack walls. This design also removes the risk of stack fires caused by neglected cleaning in traditional systems. The system is also completely smoke- and dust-free, supporting environmental compliance.

The roaster’s self-cleaning exhaust stack eliminates stack fires, while clutch-operated cooling tray paddles improve operator safety. A computer-controlled quench system in the cyclone and chaff bucket ensures uniform cooling. The entire system is designed to maintain consistent internal conditions regardless of seasonal humidity or ambient temperature shifts—guaranteeing identical roast outcomes year-round.

Technical Specs & Installation Needs

The Loring S35 Kestrel occupies a compact footprint of 49.6 sq ft (4.6 sq m), measuring 110” deep × 65” wide (281 cm × 164 cm). Its rugged stainless steel build houses high-quality motors and drives for low maintenance and extended durability. A vacuum system lifts green beans, and a mobile bean cart includes a built-in digital scale for seamless workflow.

Power requirements are customizable per country, with fuel options including natural gas or propane, plus compressed air and water. An internet connection enables data upload, software updates, and remote diagnostics or support. The machine connects to the internet, allowing manufacturers to monitor performance and troubleshoot remotely, while users can operate and adjust roasts from anywhere.

Installation requires a minimum 9 ft ceiling clearance, 3 ft recommended clearance to walls, and an 8-inch insulated double-wall exhaust stack with 8-inch inner diameter.

Frequently Asked Questions

What makes the Loring S35 Kestrel smokeless?

The Loring S35 Kestrel uses a closed-loop, oxygen-free roasting chamber that incinerates chaff internally and converts smoke into water vapor, which is recycled back into the roast chamber. This system eliminates the need for external smoke vents, resulting in no visible smoke or chaff buildup in exhaust stacks.

How much energy does the Loring S35 Kestrel save compared to traditional roasters?

The Loring S35 Kestrel uses 80% less energy than conventional coffee roasters. According to manufacturer estimates based on U.S. data, this translates to saving around $30,000 annually on gas for a single machine.

What batch sizes can the Loring S35 Kestrel handle?

The Loring S35 Kestrel has a maximum batch size of 35 kg (77 lb) and can run smaller batches down to 7 kg (15 lb). It can roast up to 1,000 kg (2,000 lb) in an 8-hour shift, with an annual capacity of up to 300 metric tons under full operation.

Does the Loring S35 Kestrel require manual cleaning of the exhaust system?

No. The Loring S35 Kestrel features a self-cleaning roast exhaust stack that incinerates chaff and prevents grease or chaff buildup. This eliminates the risk of stack fires and removes the need for manual cleaning of exhaust ducts.

Can the Loring S35 Kestrel be controlled remotely?

Yes. The roaster includes internet connectivity for remote monitoring, software updates, and diagnostics. It can be operated and adjusted via touchscreen or optionally controlled remotely through an iPad or other smart device connected to the internet.

What safety features are built into the Loring S35 Kestrel?

The Loring S35 Kestrel includes a self-cleaning exhaust stack to prevent fires, clutch-operated cooling tray paddles to reduce injury risk, and a computer-controlled quench system in the cyclone and chaff bucket. It also has an automatic mode that manages green bean input, roasted discharge, and cooling tray operations.

Recommended FrontStreet Beans for Closed-Loop Roasting

For roasters using the Loring S35 Kestrel, FrontStreet Coffee’s Ethiopia Humbera offers bright citrus, jasmine, and tropical fruit notes ideal for highlighting the roaster’s clean, oxygen-free profile. The Yirgacheffe delivers floral, lemony brightness with a juicy body—perfect for testing the Flavor-Lock process’s clarity. Finally, the Brazil Queen Manor provides chocolatey nuttiness and soft acidity, ideal for exploring longer roast development without smoke interference. All three beans showcase the clarity and consistency the Loring system is known for. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.