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Black ATX mid tower case with mesh front panel and four 140mm PWM fans visible

Rosewill

Rosewill Helium NAS Duo ATX Mid Tower PC Case

SKU CH-J6ST-ABYKD

ATX mid-tower case holds eight 3.5" drives plus two 2.5" bays, includes four 140 mm PWM fans and a mesh front panel for airflow, supports 360 mm top radiator, 380 mm GPU.

  • TypeATX Mid Tower
  • ColorBlack
  • Case MaterialSteel / Plastic
  • Motherboard CompatibilityATX / E-ATX / Micro ATX / Mini ITX
  • Dust FiltersYes
  • Internal 3.5" Drive Bays8

Model Helium NAS DUO

  • Store eight 3.5" drives for massive NAS capacity
  • Four pre-installed 140mm PWM fans deliver strong airflow
  • Mesh front panel enhances cooling across all components
  • Front USB 3.2 Type-C port enables fast device connections
  • Top mount supports 360mm radiator for high-end liquid cooling

Built for High-Capacity NAS Builds

The Rosewill Helium NAS Duo is an ATX mid-tower chassis designed for storage-heavy systems. It accepts ATX, E-ATX, Micro-ATX and Mini-ITX motherboards, making it suitable for DIY NAS appliances, media servers or small-business workstations. A steel and plastic frame with a black finish gives it a clean, professional appearance in any environment.

Eight 3.5-Inch Drive Bays Define Capacity

The single specification that determines fit is the eight internal 3.5-inch bays, supplemented by two 2.5-inch positions. This density allows a single chassis to hold a large RAID array without external enclosures. Seven expansion slots provide room for HBA cards or additional networking adapters needed by storage workloads.

Mesh Front and Four 140mm PWM Fans Move Air Quietly

A full mesh front panel feeds three pre-installed 140mm PWM fans at the front and one at the rear, creating strong front-to-back airflow across the drive stack. Top mounts accept up to a 360mm radiator or additional 120mm or 140mm fans for liquid cooling. Dust filters on the intakes help keep the interior clean during continuous operation.

Highlights

  • Store eight 3.5" drives for massive NAS capacity
  • Four pre-installed 140mm PWM fans deliver strong airflow
  • Mesh front panel enhances cooling across all components
  • Front USB 3.2 Type-C port enables fast device connections
  • Top mount supports 360mm radiator for high-end liquid cooling

Specifications

BrandRosewill
ModelHelium Nas Duo
TypeATX Mid Tower
ColorBlack
Case MaterialSteel / Plastic
Motherboard CompatibilityATX / E-ATX / Micro ATX / Mini ITX
Dust FiltersYes
Internal 3.5" Drive Bays8
Internal 2.5" Drive Bays2
Expansion Slots7
Front Ports1 x USB 3.2 Type C / 1 x USB 3.0 / Audio
Fan OptionsFront - 3 x 120mm / Front - 3 x 140mm / Rear - 1 x 120mm / Rear - 1 x 140mm / Top - 2 x 140mm / Top - 3 x 120mm
Pre-installed FansFront: 3 x 140mm PWM Fans Included
Rear: 1 x 140mm Included
Radiator OptionsRear - Up to 120mm / Top - Up to 360mm
Max GPU Length380 mm
Max CPU Cooler Height180 mm
Max PSU Length200 mm
Shipping weight8.48 kg
Package size538 × 533 × 292 mm

Other versions of this model

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Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Can I fit eight 3.5-inch hard drives and still add a 360 mm radiator on top?

Yes. The case supports eight 3.5-inch bays and a top-mounted radiator up to 360 mm, so both can be installed together.

Will a graphics card measuring 390 mm clear the front fans?

The specifications list a maximum GPU length of 380 mm, so a 390 mm card would exceed the supported limit.

What front-panel ports are available for external drives?

The front panel provides one USB 3.2 Type-C port, one USB 3.0 port and an audio jack.

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