True HEPA vs 3-in-1 Filter: DREO Air Purifier Comparison

Quick answer

For DREO 539S and 539S Black owners, the 3-in-1 HEPA filter is the only compatible replacement and offers a lower upfront cost. For Macro Max S owners, the True HEPA filter provides a higher filtration grade (H13) and a deeper 3-in-1 system, but at a higher price. Choose based on your purifier model and whether you prioritize filtration efficiency or replacement cost.

What's the difference between True HEPA and 3-in-1 filters?

True HEPA filters meet a specific standard (H13 or H12) that captures at least 99.97% of particles as small as 0.3 microns. The term "3-in-1" describes a multi-layer design that typically combines a pre-filter, a HEPA-type layer, and an activated carbon layer. Not all 3-in-1 filters are True HEPA — the actual performance depends on the HEPA rating and the quality of each layer.

DREO offers both types: the 3-in-1 HEPA filter for the 539S/539S Black and the True HEPA replacement filter for the Macro Max S. The 539S filter is a 3-in-1 design that includes a HEPA layer, while the Macro Max S filter is an H13 True HEPA with a 3-in-1 deep filtration system. The key difference is the HEPA grade and the specific model compatibility.

Which DREO models use each filter?

The 3-in-1 HEPA filter (product ID 2552523) is designed exclusively for DREO 539S and 539S Black models (DR-HAP009/DR-HAP009S). The True HEPA replacement filter (product ID 2552536) is built for the DREO Macro Max S air purifier. There is no cross-compatibility between these two filter types — you must use the correct filter for your specific purifier model.

Filtration performance and cost comparison

The True HEPA filter for Macro Max S uses an H13 grade HEPA media, which is certified to capture 99.97% of airborne particles. It also includes a 3-in-1 deep filtration system with an ultra-fine pre-filter and high-efficiency activated carbon layer. The 3-in-1 HEPA filter for the 539S/539S Black does not specify an H13 or H12 rating in its catalog facts, so its particle capture efficiency is not confirmed to the same standard — this is a limitation to consider if you have specific allergy or asthma concerns.

Price is another differentiator. The 3-in-1 filter for the 539S costs $20.69 (regularly $29.99), while the True HEPA filter for Macro Max S costs $32.99 (regularly $49.99). The 539S filter is more affordable upfront, but note that an $8 shipping fee applies to each accessory type in your order. The Macro Max S filter does not list a separate shipping fee in its catalog facts, so total cost may vary.

Trade-offs to consider

• Filtration grade: The Macro Max S True HEPA is H13 certified; the 539S 3-in-1 filter does not specify a HEPA grade in its catalog facts. If you need verified high-efficiency particle capture, choose the True HEPA for Macro Max S.
• Replacement cost: The 539S 3-in-1 filter costs $20.69 (plus $8 shipping per accessory type). The Macro Max S True HEPA costs $32.99. The 539S filter is cheaper per unit, but the shipping fee can add up if ordering multiple accessories.
• Model compatibility: Each filter works with only one purifier model line. The 539S filter fits 539S/539S Black; the True HEPA fits Macro Max S. Always confirm your purifier model before purchasing. There is no cross-compatibility.

Filter specifications at a glance

• Air Purifier 3-in-1 HEPA Filter For 539/539S Black: Compatible with DREO 539/539S Black (DR-HAP009/DR-HAP009S, Black). An $8 shipping fee applies to each accessory type in your order. If you own a 539S, this is your only compatible filter option. Factor the $8 shipping into your total replacement cost.
• True HEPA Replacement Filter for Macro Max S: Dreo Air Purifiers Replacement Filter, H13 True HEPA Filter for Dreo Macro Max S Air Purifier, Ozone-free, with 3-in-1 deep filtration system, Ultra-Fine Pre-Filter, High Efficiency Activated Carbon Filter. The H13 True HEPA rating provides verified 99.97% particle capture, making it a stronger choice for allergy sufferers. The 3-in-1 system also handles odors and larger particles.

Which filter should you choose?

Best for

• 539S/539S Black owners who want an affordable, compatible replacement filter
• Macro Max S owners who need H13 True HEPA performance for allergy or asthma relief

Not for

• 539S owners who expect an H13-certified filter — the 3-in-1 filter does not specify this grade
• Anyone looking for a universal filter that fits multiple DREO models