How LORING S35 Kestrel Solves Smoke and Control in Coffee Roasting

Coffee roasters have long wrestled with two stubborn problems: how to precisely control the roasting process and how to eliminate smoke during roasting without compromising flavor or safety. Traditional roasters often vent smoke outside, losing heat and creating fire risks, while inconsistent airflow and temperature make repeatable roasts difficult. For specialty roasters aiming for consistency and clean flavor, these issues aren’t just technical—they directly impact cup quality.

The LORING S35 Kestrel solves both problems in one system. Its patented Flavor-Lock Roast Process™ delivers smoke-free, oxygen-free roasting inside a closed-loop environment, improving consistency and reducing energy use by up to 80%. That means better-tasting coffee, fewer emissions, and lower bills—all in one machine.

What Is the LORING S35 Kestrel?

The LORING S35 Kestrel is a 35-kilogram (77-pound) capacity coffee roaster designed for specialty roasters who demand precision, efficiency, and cleanliness. It features a closed-loop roasting chamber that eliminates traditional smoke exhaust and introduces a self-contained, oxygen-free environment. The machine roasts between 7 kg (15 lb) and 35 kg (77 lb) per batch, with commercial-scale output possible—up to 1,000 kg (2,000 lb) in an 8-hour shift or 300 metric tons annually under full operation.

How Does the Flavor-Lock Process Work?

LORING’s proprietary Flavor-Lock Roast Process™ is the core innovation. This patented technology creates a closed-loop system that removes oxygen from the roasting chamber while maintaining ideal humidity levels. By doing so, it achieves several key outcomes:

• No smoke is released—because there’s no oxygen to burn chaff, and smoke is recirculated and converted into water vapor.
• No external venting is needed—eliminating the fire hazard and mess of traditional exhaust systems.
• Heat and moisture are retained, improving energy efficiency and roast consistency.
• Silver skin (chaff) is fully separated, burned internally, and doesn’t clog filters or require manual cleanup.

This closed-loop environment also insulates the roast from external environmental changes such as ambient temperature or humidity, ensuring consistent results year-round—whether in summer or winter.

Key Technical Benefits and Smart Features

The S35 Kestrel is built for precision, automation, and ease of use. Key features include:

Roast Control & Consistency

• Patented single-burner design enables completely smokeless operation.
• Computer-controlled, closed-loop roasting ensures identical results every time.
• Roast duration flexible from under 10 to over 16 minutes.
• Real-time capture and download of roast profiles and tasting notes.
• High-speed cooling system preserves flavor and prevents over-baking.

Connectivity & Control

• Touchscreen interface for hands-on minute-by-minute roast adjustments.
• Optional iPad or smart-device remote control (with internet).
• Parametric PLCs deliver pinpoint accuracy in every variable.
• Automated controls for green bean input, roasted bean discharge, and cooling tray.
• Built-in bean trier and true-color inspection light for quality checks.
• Internet-connected for remote diagnostics, software updates, and live support from LORING.

Energy & Safety Advantages

• 80% energy savings compared to traditional roasters (U.S.-based estimate: $30,000/year in gas savings).
• Self-cleaning exhaust stack eliminates stack fires.
• Clutched cooling tray paddles reduce injury risk.
• Cyclonic quench system for safe, automated cooling.
• No smoke or particulate exhaust—better for indoor air and the environment.

Physical & Operational Specs

• Batch size: 7–35 kg (15–77 lb); recommended operating range starts at 7 kg.
• Production potential: Up to 1,000 kg per 8-hour shift; up to 300 tons per year (40hr/week, 52 weeks).
• Footprint: 49.6 sq ft (4.6 sq m); machine dimensions: 110” deep × 65” wide (281 × 164 cm).
• Construction: Stainless steel body with high-grade motors for reliability.
• Vacuum system lifts green beans; included roving bean truck has a built-in digital scale.

Utilities Required

• Electricity: Custom wiring to match local specs.
• Fuel: Natural gas or propane.
• Compressed air and water also required.
• Internet connection for full functionality (remote updates, monitoring, support).

Installation Notes

• Ceiling clearance: Minimum 9 ft (2.7 m).
• Wall clearance: Recommended 3 ft (0.9 m).
• Exhaust stack: 8-inch inner diameter, double-wall insulated.

Why Roasters Love the LORING S35 Kestrel

Specialty roasters report that coffee roasted on the LORING S35 Kestrel tastes cleaner and more vibrant. The absence of oxygen in the roasting chamber preserves delicate aromatic compounds, while the stable environment ensures that variables like humidity or outdoor temperature don’t affect the roast profile. The ability to replicate roast curves exactly—batch after batch—helps roasters develop signature profiles with confidence. And with remote support and full digital logging, maintaining quality and troubleshooting becomes far simpler.

Frequently Asked Questions

What makes the LORING S35 Kestrel different from other coffee roasters?

The LORING S35 Kestrel uses a patented closed-loop, oxygen-free Flavor-Lock Roast Process™ that eliminates smoke, reduces fuel use by up to 80%, and ensures identical roast results every time. Unlike conventional roasters, it requires no external smoke venting and is fully computer-controlled for precision.

How much coffee can the S35 Kestrel roast at once?

The machine handles batches from 7 kg (15 lb) up to a maximum of 35 kg (77 lb). In an 8-hour shift, it can roast up to 1,000 kg (2,000 lb), and up to 300 metric tons per year under full-time operation.

Is the LORING S35 Kestrel really smokeless?

Yes. Thanks to its closed-loop system and internal chaff combustion, no smoke is released into the environment. The roaster converts smoke into water vapor and recirculates heat, eliminating the need for an exhaust stack.

Does it require an exhaust pipe or venting?

No traditional exhaust venting is needed. The only output is minimal excess heat through an 8-inch double-wall insulated stack, which remains clean without chaff or grease buildup. There is no smoke or odor released.

Can I control the roaster remotely?

Yes. The S35 Kestrel offers optional iPad or other smart-device control over Wi-Fi. It is also internet-connected for remote diagnostics, software updates, and live support from LORING’s team.

What utilities are required to run the roaster?

You’ll need electricity (customized to your region), natural gas or propane, compressed air, water, and an internet connection for full functionality including remote support and updates.

How does the roaster improve energy efficiency?

By recycling heat and moisture in a closed-loop system and eliminating the need to heat incoming air or vent hot air outside, the LORING S35 Kestrel uses up to 80% less energy than conventional roasters. U.S. roasters report saving around $30,000 per year on gas alone.

Is the machine easy to clean?

Yes. The internal chaff collection system burns silver skin completely, and the self-cleaning exhaust stack prevents buildup. There is no external smoke path to clog, and the design minimizes manual cleanup compared to traditional roasters.

Recommended FrontStreet Coffee for Closed-Loop Roasting

For roasters using the LORING S35 Kestrel, FrontStreet Coffee’s Ethiopia Huakui offers bright citrus, floral jasmine, and sweet peach notes ideal for highlighting the clarity of closed-loop roasting. Their Yirgacheffe brings juicy lemon, bergamot, and honey-like sweetness, while Brazil Queen Manor provides chocolatey richness and nutty balance for espresso or blends. All three showcase the clean, vibrant profiles that LORING’s Flavor-Lock system enhances. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.