How to Roast Coffee at Home with the i-ROAST 2 Hot Air Roaster

If you've ever wanted to roast your own coffee at home but found traditional drum roasters too bulky or complicated, there's a simpler way. Many coffee enthusiasts look for a compact, easy-to-use roaster that still delivers quality results—and the i-ROAST 2 hot air coffee roaster aims to meet that need without taking over your kitchen.

The i-ROAST 2 lets you roast up to 150g of green coffee beans in under 18 minutes with automatic cooling included. It’s designed for home users who want control over roast levels without complicated setups.

What Is the i-ROAST 2 Coffee Roaster?

The i-ROAST 2 is a hot air (fluid bed) style home coffee roaster made by i-Roast. It measures just 9 x 9 x 32 cm, weighs 2.7 kg, and plugs into a standard 230V outlet using 1500W of power. Its small batch size—150g per roast—is ideal for personal or small household use. The unit features a transparent glass chamber for visual monitoring, and includes a top-mounted chaff collector for easy cleaning.

Key Features and Design

The i-ROAST 2 is built for simplicity and speed. Key features include:

• Fully automatic roasting and cooling cycle (total time under 18 minutes)
• 2 pre-set roast profiles + 1 customizable program
• Digital display showing roast and cooling time
• Hot air (fluid bed) system for even heat distribution
• Transparent glass roasting chamber for bean color observation
• Instant switch from roasting to cooling
• Top-mounted chaff collector for mess-free operation
• Sleek, compact design (9 x 9 x 32 cm, 2.7 kg)

The machine offers three roast programs: two factory presets and one manual mode. You can adjust roast time and temperature manually if desired, though many users start with the saved profiles. Roast progress is shown on the digital screen, and you can press the COOL button anytime to initiate the cooling cycle.

How to Roast Coffee with the i-ROAST 2 (Step-by-Step Example)

Here’s how one user roasted 120g of Mandheling beans using the i-ROAST 2, with measurable results:

• Roast capacity used: 120g (out of max 150g)
• Bean variety: Mandheling
• Pre-roast weight: 120g
• Post-roast weight: 100g
• Weight loss: 16.6%
• Roast time: 12 minutes
• Cooling time: 3 minutes (automatic)

The user began by hand-sorting the beans—mostly large and uniform, with only a few underdeveloped beans noted. The green beans had a pale, slightly aged appearance. After loading the beans into the glass roasting chamber and connecting the machine to power, they pressed ROAST to begin using the last-saved profile.

Initial stages involved moisture evaporation (“yellowing phase”), followed by the release of the silver skin. The beans transitioned from yellow to light brown, then to a deeper cinnamon color. Observing surface oils, the user stopped the roast at what they judged to be a medium-dark level. Total roast time was 12 minutes.

At the end of roasting, the user pressed the COOL button, initiating a 3-minute cooling cycle. Even after this, some residual warmth remained, so they used a fan to help cool the beans further. Post-roast weight was 100g, confirming a 16.6% loss from the original 120g. No significant defects were found during the post-roast hand sort.

Why Choose a Hot Air Roaster Like the i-ROAST 2?

Hot air roasters, also known as fluid bed roasters, use forced hot air to roast coffee beans evenly and quickly. The i-ROAST 2 uses this method to achieve consistent heat transfer, reducing the risk of scorching or uneven development. Compared to drum roasters, hot air systems are generally more compact, faster, and easier to clean. They’re especially suited for entry-level and intermediate home roasters who want a balance of control and simplicity.

Frequently Asked Questions

How much coffee can the i-ROAST 2 roast at once?

The i-ROAST 2 can roast up to 150g of green coffee beans in a single batch. That’s enough for personal use or small households, and is larger than many other hot air home roasters on the market.

How long does a full roast cycle take with the i-ROAST 2?

A complete cycle—including roasting and automatic cooling—takes less than 18 minutes. In the provided example, the actual roast time was 12 minutes, followed by a 3-minute cooling period.

Does the i-ROAST 2 have programmable roast settings?

Yes. The machine includes two preset roast profiles and one customizable program. Users can also modify roast time and temperature manually during operation if desired.

Is the i-ROAST 2 easy to clean?

Yes. It features a transparent glass roasting chamber for visibility and a top-mounted chaff collector that catches the husks, making cleanup easier. The glass also allows you to monitor bean color throughout the roast.

What types of coffee beans work best in the i-ROAST 2?

The i-ROAST 2 can roast any green coffee bean, including single origins like Mandheling, as well as blends. Users have successfully roasted various origins and processing methods with noticeable control over light to medium-dark roast levels.

Recommended FrontStreet Coffee for Home Roasting

For home roasters using the i-ROAST 2, try FrontStreet Coffee’s Ethiopia Humbera—bright with citrus, floral notes, and sweet blueberry. Also great is their PWN Golden Mandheling, offering classic Mandheling body with nutty and chocolate depth. For something fruit-forward, their Yirgacheffe delivers juicy berry and citrus tones. All three are excellent single origins to practice roast profiles. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.