SUNLU S1 undercuts Comgrow SH01 on price with the same strong rating
If you’re trying to stop wet filament ruining your prints, these two budget dryer boxes are both solid contenders. The Comgrow SH01 and SUNLU S1 are aimed at the same job: keeping PLA, PETG, ABS and other common filaments dry while they sit on the spool holder or feed into your printer. On paper, they’re very evenly matched on reputation, but the price gap makes this a proper value decision rather than a spec-sheet tie. Here’s the practical answer for makers who want the best buy in the UK.
Comgrow 3D Printer Filament Dryer Box SH01, 3D Filament Storage, Keeps Filaments Dry During 3D Printing, Compatible with 1.75mm/2.85mm PLA PETG ABS Material, Filament Dryer, Spool Holder
Dryer Box of 3D Printer Filament, SUNLU 3D Filament Dryer Box S1, Keeping Filaments Dry During 3D Printing, Filament Holder, Compatible with 1.75mm, 2.85mm, 3.00mm Filament, Storage Box
Our Recommendation
Buy the SUNLU S1. It matches the Comgrow SH01’s 4.4/5 rating, costs £12.75 less, and supports a wider range of filament diameters, including 3.00mm. For a filament dryer box, that’s the kind of practical advantage that matters more than a slightly higher review count. In short, SUNLU gives you more flexibility for less money.
Detailed Comparison
Display
Neither product listing provides any meaningful display information, so there’s no real winner here on screen quality. In practice, both are simple filament dryer boxes rather than fancy smart appliances with touchscreens, app control or detailed readouts. If you were hoping for a clear advantage in interface polish, neither listing gives enough evidence to separate them. Winner: tie.
Performance
Both products are designed to solve the same problem: moisture in filament causing popping, stringing, weak layer bonding and ugly surfaces. They both support common filament sizes, with Comgrow listing 1.75mm and 2.85mm, while SUNLU lists 1.75mm, 2.85mm and 3.00mm. That extra 3.00mm support gives SUNLU a small compatibility edge for anyone using less common stock. Winner: SUNLU S1, because it covers more filament diameters.
Build quality and design
From the information provided, both are purpose-built storage/drying boxes with spool-holder functionality, and both have very similar user ratings: 4.4/5. Comgrow has 3,236 reviews versus SUNLU’s 3,010, which suggests both have been widely used and generally well received. The review volume edge goes to Comgrow, but that’s not enough on its own to justify paying more when the star rating is identical. Since SUNLU offers the broader filament compatibility and the product category is otherwise closely matched, it nudges ahead on practical design flexibility. Winner: SUNLU S1.
Battery life
There is no battery in either product as listed, so this category does not apply. These are mains-powered filament storage/dryer boxes, not portable battery devices. Winner: tie.
Price and value for money
This is the big one. The Comgrow SH01 costs £42.74, while the SUNLU S1 costs £29.99, making SUNLU £12.75 cheaper. When two products share the same 4.4/5 rating and both are clearly aimed at the same core job, the lower-priced option is usually the smarter buy unless the pricier model has a standout feature advantage. Here, Comgrow’s only obvious edge is a slightly higher review count, which does not outweigh the saving. Winner: SUNLU S1, decisively.
Game library/features
These aren’t game devices, but in the spirit of feature comparison, the relevant question is compatibility and usability. Comgrow supports 1.75mm and 2.85mm filament, which covers the most common use cases. SUNLU supports those plus 3.00mm, so it is the more flexible choice if your workshop has older or less common filament stock, or if you simply want fewer compatibility worries. On the available data, SUNLU wins on features because it offers the broader filament range at a lower price. Winner: SUNLU S1.
Overall user experience
For most makers, the user experience here comes down to simple, no-drama drying and storage. Both products have strong review scores, so neither looks like a risky purchase. Comgrow’s higher review count may reassure buyers who value a larger sample size, but SUNLU’s combination of equal rating, lower price and wider filament compatibility is exactly what most people want from a filament dryer box. If you’re buying today and want the best balance of confidence and cost, SUNLU feels like the more sensible, maker-friendly pick. Winner: SUNLU S1.
Overall summary: the Comgrow SH01 is a decent option with a strong track record, but the SUNLU S1 wins this head-to-head for most buyers. It’s cheaper by £12.75, matches the 4.4/5 rating, and supports an extra filament diameter. Unless you specifically prefer Comgrow’s slightly higher review count, the SUNLU is the better value and the better buy.
Buy the Comgrow 3D Printer if...
Buy the Comgrow SH01 if you specifically want the model with the slightly larger review base and you trust that extra volume more than a cheaper price. It also makes sense if you only ever use 1.75mm or 2.85mm filament and don’t care about 3.00mm support. If Comgrow is on a sale that closes the price gap, it becomes much more competitive.
Buy the Dryer Box of if...
Buy the SUNLU S1 if you want the best value straight away and you like the idea of broader filament compatibility. It’s the better pick for mixed workshops, older 3.00mm filament users, or anyone simply trying to save money without giving up rating quality. For most UK makers, this is the one to click.
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