Comgrow Filament Dryer SH03

Quick sizing guide

Two independent chambers let the Comgrow SH03 dry and store different filament types separately, while its rotating spool modules and dedicated outlet tubes let filament feed toward a 3D printer. It supports up to four 1 kg spools at once, arranged as two spools per chamber, so it suits a multi-spool setup better than a small single-roll dryer.

The listed filament diameters are 1.75 mm and 2.85 mm. PLA, PETG, and ABS are named in the product title, the description also lists TPU, ASA, PA, and PC.

A practical use: load PLA in one chamber and PETG in the other, set each chamber independently, then route the filament through its outlet as you print. The product details don’t give the box’s external dimensions, so spool capacity alone won’t tell you whether it fits your workspace.

Pros

• Independent temperature controls and on/off functions allow the two chambers to run separately.
• Dual 200W PTC heating modules support an adjustable range of 45–85°C, with a dedicated 50°C PLA preset.
• Automatic mode starts drying when humidity exceeds its preset threshold, then enters storage mode after humidity falls and a 30-minute countdown finishes.
• A 360-degree hot-air circulation fan, adjustable heating duration, and independent airflow channels are designed to distribute heat and manage moisture.
• Monitoring and protection features include outlet-temperature monitoring, a PTC overheat circuit breaker, fan monitoring, and main-control-board temperature monitoring.

This setup is more involved than a basic sealed storage box: it adds active heating, humidity-responsive drying, and separate chamber controls. That brings more control, but also means choosing settings for the filament rather than treating every spool the same. The details don’t specify the humidity threshold or give individual drying schedules for each material.

Spec sheet

• Name: Comgrow SH03
• Type: Dual-chamber filament dryer and storage box
• Capacity: Up to four 1 kg spools, two per chamber
• Heating: Two 200W PTC modules
• Temperature range: 45–85°C
• Filament diameter: 1.75 mm and 2.85 mm
• Display: 5-inch segment display with touch keys and backlighting
• Maximum continuous heating duration: 98 hours

The display and separate controls are useful if you expect to switch between materials or manage two spools at once. Still, the capacity is the headline advantage, if you only dry one spool occasionally, a simpler single-spool unit may be easier to justify.

Should you buy it?

Worth considering if you regularly keep several filament types ready for printing and want active drying as well as storage in one box. The independent chambers are the main reason to choose it over a basic dryer: they let you handle two materials without relying on one shared setting. From the way it is set up, the automatic mode is intended to reduce the need to monitor each drying cycle, though the listed details don’t explain how its humidity threshold is selected.

It’s not for you if you need a compact unit with clearly stated external dimensions, or if you want material-specific drying instructions included in the product details. For frequent multi-material printing, its four-spool capacity and separate controls offer a practical fit, for occasional single-spool use, that extra capacity may go unused.