PrintDry launches modular PRO4 filament dryer for multiple spools

Wet filament is still one of the fastest ways to ruin a good print. It shows up as stringing, rough surfaces, weak layer adhesion and brittle parts, and those problems hit hardest on the materials people actually wrestle with day to day: PETG, TPU, nylon and PC blends. PrintDry’s new PRO4 is built around that reality, not around a flashy printer spec sheet. The Canadian company has moved its dryer line from a basic desktop unit into a more mature modular system that can handle more than one spool at a time and keep filament moving straight to the printer while it stays dry.

The headline number is 85°C. PrintDry says the PRO4 offers six presets at 35°C, 45°C, 55°C, 65°C, 75°C and 85°C, plus a built-in timer that runs up to 48 hours and a real-time humidity monitor that reads from under 15% to 99%. That puts the dryer in a range meant for more demanding engineering materials, not just PLA that sat out too long. The front-feed setup also matters in practice: once filament is dry, it can be fed directly to the printer through the dryer, instead of sitting exposed on a table or swapping back and forth between print and storage.

What makes the PRO4 more than another small appliance is the modular format. PrintDry says the base unit is an upgrade path for PRO and PRO3 owners, and its shop lists extension hardware, including large-spool accessories for bigger rolls up to 5 kg. That is the difference between a single-spool convenience box and a tool that fits a home shop or small production bench. PrintDry also says its dryers have been independently tested by Intertek and TUV to meet applicable safety standards in North America and Europe, a point that matters when the alternative is a kitchen oven or an improvised dry-box setup.

Price sets the boundary for who should care. The PRO4 starts around CA$279 for the base unit and CA$299 for a larger bundle. That is a serious buy compared with a cheap dry box or an oven hack, but the higher price makes sense for anyone running PETG, TPU, nylon or PC blends often enough to care about repeatability, or anyone feeding multiple spools through long prints. PrintDry’s earlier filament dryer Kickstarter pulled in CA$53,650 from 271 backers on a CA$6,000 goal, a sign that this is not a novelty category. For makers fighting moisture at the bench, the PRO4 is the kind of upgrade that fixes problems before they reach the nozzle.