EverCool HD-AR-B Dual 5.25 in. to Triple 3.5 in. HDD Cooling Box (Pack

In this review the EverCool HD-AR-B dual 5.25 in. to triple 3.5 in. HDD cooling box is evaluated for users who need to mount and cool multiple hard drives inside a standard desktop chassis. The bottom line: this pack of 2 units is best for system builders who want a simple, tool-free way to convert dual 5.25 in. drive bays into multiple 3.5 in. or 2.5 in. HDD mounts while adding active cooling and dust filtration. The main reason to buy is straightforward: it combines conversion, shock absorption and a dedicated 8cm fan to keep drive temperatures down in compact bay spaces.

Key Features

• Dual-bay conversion: Converts two adjacent 5.25 in. drive bays into three 3.5 in. HDD mounting positions to expand storage capacity without modifying the case.
• 2.5 in. support: The conversion also accepts four 2.5 in. drives, offering flexibility for mixing HDD and SSD installs.
• Active cooling: One long-life 8cm fan and a meshed design improve air convection to lower drive operating temperatures under load.
• Removable filter: Inside demountable filters trap dust and are easy to remove and clean to protect drives and maintain airflow.
• Shock absorption: Aseismatic design cushions hard disks to reduce the risk of damage from case vibration or transport.

Who It's For

The EverCool HD-AR-B is suited to DIY builders, small NAS or media workstation setups and anyone who needs more internal 3.5 in. drive bays without buying a larger case; the built-in fan and dust filter make it useful where dust and heat are concerns. It is also practical for those who mix 2.5 in. SSDs and 3.5 in. HDDs and want a compact bay solution.

It is not ideal for users who prefer hot-swap enterprise drive trays or need advanced fan speed control, as the design focuses on simple bay conversion and basic cooling rather than rack-grade features. Users needing tool-less hot-swapping should look at dedicated external enclosures instead.

Pros & Cons

Pros

• Expands two 5.25 in. bays into multiple 3.5 in. and 2.5 in. drive mounts, maximizing storage in desktop cases.
• Includes an 8cm long-life fan and meshed airflow path for improved cooling over passive adapters.
• Demountable filters are easy to clean, helping maintain interior cleanliness and consistent airflow.
• Shock absorption design helps protect drives from vibration and minor shocks.

Cons

• Fan speed and noise control are basic; users seeking adjustable fan profiles will need external fan controllers.
• Not a hot-swap solution; drives are fixed inside the bay and require case access for maintenance.

Specifications

Our Verdict

The EverCool HD-AR-B (pack of 2) is a practical, cost-effective choice for builders who need to expand internal HDD capacity and add basic active cooling and dust protection. It delivers sensible value for desktops and home servers where hot-swap features are not required, combining conversion flexibility and protective design in a small footprint.

Frequently Asked Questions

Can this accept 2.5 in. SSDs?
Yes, each unit can accommodate four 2.5 in. drives when configured for smaller drives.

Is the fan easy to replace?
The fan is a standard 8cm long-life type; it is accessible inside the bay but requires opening the case for replacement.

Are the dust filters washable?
Yes, the inside demountable filters are designed to be removed and cleaned to maintain airflow.