NZXT H3 Flow Micro-ATX Mid-Tower Computer Case Black (CC-H31FB-01)

H3 Flow

The H3 Flow micro-ATX case combines a space-efficient design with high-performance capability. Designed to support full-sized components, it features ultra-fine mesh panels and a ventilated PSU shroud to maintain consistent, optimized airflow throughout your build.

Space-Saving Size 

A space-efficient micro-ATX chassis that accommodates high-performance components without compromise.

High-Airflow Design 

Ultra-fine steel mesh panels and a ventilated PSU shroud maximize airflow while effectively filtering out dust.

Extensive Cooling Support 

Supports up to a 280 mm radiator in the front, a 240 mm radiator on top, and up to seven fans for powerful, customizable cooling performance.

Full-Size GPU Support 

Fits graphics cards up to 377 mm (without front fans), 352 mm (with front fans), or 317 mm (with front radiator and fans installed).

Pre-Installed Rear Fan 

Includes one F120Q (CV) fan at the rear to provide efficient exhaust airflow straight out of the box. CV = Case Version (3-pin DC)

Simplified Cable Management 

Integrated cable channels and multiple tie-down points make it easy to route and organize cables for a clean, organized build.

Back-Connect Motherboard Compatible 

Ready for rear-connector motherboards like ASUS BTF and MSI Project Zero, enabling a clean, cable-free aesthetic.

Tool-Free Access: Removable top, front, and side panels allow for easy upgrades and cleaning—no tools required.

Sized Down. Powered Up.

The H3 Flow delivers high-performance airflow in a space-efficient micro-ATX footprint. With fine mesh panels, a ventilated PSU shroud, and support for large components, it keeps powerful parts cool without taking over your desk

Space-Saving Design

The micro-ATX form factor fits into smaller spaces, maximizing desk space without compromising on performance.

Optimized Airflow

Ultra-fine mesh on the front, top, and sides enhances cooling while filtering dust. The ventilated PSU shroud optimizes intake from bottom-mounted fans.

Full-Size GPU Support

Max length of 377 mm (no front fans), 352 mm (with fans), 317 mm (with fans & radiator).

Specification

Enclosure Type : Micro-ATX Case

Motherboard Compatibility : Micro-ATX, Mini-ITX

Supports Rear-Connecting Motherboards (BTF, Project Zero) : 

Yes (Micro-ATX)

Materials : SGCC steel, clear tempered glass (white), tinted tempered glass (black)

Clearance

CPU Cooler Height : 170 mm

GPU Length : Up to 377 mm (without front fans) Up to 352 mm (with front fans) Up to 317 mm (with front radiator and fans)

PSU Length : Up to 185 mm

Cable Routing Space : Up to 31.5 mm

Front Radiator + Fan Thickness : Up to 63 mm

Top Radiator + Fan Thickness : Up to 70 mm

Front I/O Ports

USB 3.2 Type-A : 1

USB 3.2 Gen2x2 Type-C : 1

Expansion Slots

Standard : 4

Vertical : 0

Drive Bays

2.5" : 1+2

3.5" : 1

Fan Support

Front : 2 x 120 mm / 2 x 140 mm

Top : 2 x 120 mm / 2 x 140 mm

Bottom : 2 x 120 mm

Rear : 1 x 120 mm (1 x F120Q (CV) included)

Radiator Support

Front : Up to 280 mm

Top : Up to 240 mm

Fan Specs

Model : F120Q (CV)

Speed ; 1,350 ± 150 RPM

Airflow : 60.2 CFM

Static Pressure : 1.05 mmH2O

Noise : 24.1 dBA

Fan Connector : 3-pin

Dimensions

Height (with feet) : 400 mm (15.75 in)

Width : 225 mm (8.86 in)

Depth : 389 mm (15.31 in)

Volume :  35.0 L

Weight : 4.8 kg (10.58 lb)