NZXT H2 Flow Mini-ITX PC Case Instruction Manual

1. Introduction

The NZXT H2 Flow (CI-H21FB-01) is a compact vertical Mini-ITX PC case designed to maximize airflow and save space while accommodating high-performance components. It features smart cable management, tool-less access, and includes dual top fans and a premium PCIe 5.0 riser cable for a streamlined building experience.

Key Features:

Hybrid Glass-and-Mesh Side Panel: Showcases your build while supporting up to a 280 mm radiator for efficient cooling.
Compact Design: A 20.7 L volume fits most GPUs up to 331 mm, offering high-end power in a small footprint.
High Airflow Panels: Ultra-fine mesh panels on multiple sides maximize fresh air intake and filter dust, keeping components cooler and cleaner.
Effortless Building: Tool-less panels, integrated cable routing Velcro straps, and intuitive wire management channels simplify installation.
Pre-Installed Performance: Includes a premium PCIe 5.0 riser cable for vertical GPU mounting and dual F120Q CV fans for immediate exhaust cooling.

2. Safety Information

WARNING: Always disconnect power from your PC before performing any installation, maintenance, or troubleshooting. Failure to do so may result in personal injury or damage to components.

Read all instructions carefully before installation.
Wear an anti-static wrist strap or frequently touch a grounded metal object to prevent electrostatic discharge (ESD) damage to components.
Handle components with care. Avoid touching pins or exposed circuitry.
Keep small parts and packaging materials away from children.
Ensure proper ventilation around the PC case to prevent overheating.

3. Package Contents

Verify that all items are present in your NZXT H2 Flow package:

NZXT H2 Flow Mini-ITX PC Case
2 x 120mm F120Q CV Top Fans (pre-installed)
Premium PCIe 5.0 Riser Cable (pre-installed)
Accessory Box (containing screws, cable ties, and other small parts)

4. Component Compatibility

The NZXT H2 Flow case is designed to accommodate specific component sizes for optimal performance and fit:

Motherboard: Mini ITX
Graphics Card (GPU): Up to 331 mm in length
Radiator: Up to 280 mm (for liquid cooling solutions)
Power Supply (PSU): SFX/SFXL form factor is recommended for best compatibility and cable management.
Fans: Includes 2 x 120mm top fans. Additional fan mounting options may be available depending on other component choices.

5. Setup & Installation

Follow these steps to assemble your PC within the NZXT H2 Flow case. Refer to your individual component manuals for specific installation details.

5.1. Case Overview and Dimensions

The NZXT H2 Flow is a compact vertical Mini-ITX case. Understanding its dimensions is crucial for planning your build.

NZXT H2 Flow case with dimensions labeled — **Image:** NZXT H2 Flow case with key dimensions: 435 mm height, 263 mm depth, 181 mm width. This illustrates the compact nature of the 20.7L chassis.

5.2. Accessing the Case Interior

The H2 Flow features tool-less panels for easy access to the interior.

Exploded view of NZXT H2 Flow case showing removable panels — **Image:** An exploded view of the NZXT H2 Flow case, highlighting its tool-less panels and modular design for effortless building and maintenance. This image demonstrates how various mesh and glass panels can be removed.

5.3. Motherboard and CPU Installation

Install your Mini-ITX motherboard and CPU (with cooler) before placing it into the chassis.

5.4. Power Supply Unit (PSU) Installation

The case supports SFX/SFXL power supplies. Mount the PSU in its designated area, typically at the bottom of the case.

NZXT H2 Flow case next to an NZXT C850 SFX Gold PSU — **Image:** The NZXT H2 Flow case is shown alongside an NZXT C850 SFX Gold power supply, illustrating how the compact case is engineered to pair perfectly with SFX PSUs for clean, quiet, and capable compact builds.

5.5. Cable Management

Utilize the integrated cable routing channels and Velcro straps for a clean and organized interior.

Close-up of NZXT H2 Flow's cable management features — **Image:** A detailed view of the NZXT H2 Flow's interior, showcasing the built-in cable straps and intuitive wire management channels designed to simplify installation and maintain a tidy build.

5.6. Graphics Card (GPU) Installation

The H2 Flow supports GPUs up to 331 mm in length and includes a premium PCIe 5.0 riser cable for vertical mounting.

NZXT H2 Flow case showing vertical GPU mounting with dimensions — **Image:** The NZXT H2 Flow case is depicted with a vertically mounted graphics card, indicating support for GPUs up to 331 mm in length. This highlights the spacious GPU support within the compact chassis.

Close-up of the PCIe 5.0 riser cable in NZXT H2 Flow — **Image:** A close-up of the premium PCIe 5.0 riser cable included with the NZXT H2 Flow, ensuring clean GPU mounting and reliable, high-bandwidth performance.

5.7. Cooling System

The case comes with two pre-installed 120mm F120Q CV fans at the top for exhaust. It also supports up to a 280mm radiator for liquid cooling.

NZXT H2 Flow case showing radiator support with dimensions — **Image:** The NZXT H2 Flow case is shown supporting up to a 280 mm radiator, emphasizing its liquid cooling capabilities and the hybrid glass-and-mesh panel that showcases internal components.

NZXT H2 Flow case with pre-installed 120mm fans — **Image:** The NZXT H2 Flow case is displayed with two pre-installed F120Q CV 120 mm fans, highlighting their convenient placement for exhausting air through the top panel.

5.8. Product Overview Video

Watch this official video for a visual overview of the NZXT H2 Flow Mini-ITX PC Gaming Case.

Video: Official product overview of the NZXT H2 Flow Mini-ITX PC Gaming Case, showcasing its design, features, and compact form factor.

6. Operating Instructions

6.1. Power On/Off

Press the power button located on the front I/O panel to turn your PC on or off.

6.2. Front I/O Ports

The front I/O panel provides convenient access to:

USB 3.0 Ports
USB-C Port
Audio Jack (if applicable)

Connect your peripherals such as keyboards, mice, and headsets to these ports.

7. Maintenance

7.1. Cleaning Dust Filters

The NZXT H2 Flow features ultra-fine mesh panels that act as dust filters. Regularly clean these panels to maintain optimal airflow and prevent dust buildup inside your PC.

Gently remove the mesh panels from the case.
Use compressed air or a soft brush to remove accumulated dust.
Reattach the panels securely.

7.2. General Cleaning

Use a soft, damp cloth to wipe down the exterior of the case. Avoid abrasive cleaners or solvents.

8. Troubleshooting

If you encounter issues with your PC build, consider the following common troubleshooting steps:

No Power: Ensure all power cables (PSU to wall, PSU to motherboard, CPU, GPU) are securely connected. Check the power switch on the PSU.
No Display: Verify that your monitor is connected to the graphics card (not the motherboard I/O unless using integrated graphics) and that the GPU has proper power connections. Reseat the GPU and RAM.
Overheating: Check fan connections and orientation. Ensure mesh panels are clean and not obstructed. Verify CPU cooler installation and thermal paste application.
Component Not Detected: Reseat the component (GPU, RAM, storage drives). Check power and data connections.

For more complex issues, consult your individual component manuals or NZXT customer support.

9. Specifications

Feature	Detail
Brand	NZXT
Model Name	NZXT H2 Flow
Case Type	Mini-Tower
Motherboard Compatibility	Mini ITX
GPU Length Support	Up to 331 mm
Radiator Support	Up to 280 mm
Included Fans	2 x 120mm F120Q CV Top Fans
Included Riser Cable	Premium PCIe 5.0
Power Supply Mounting Type	Bottom Mount (SFX/SFXL recommended)
Cooling Method	Air, Liquid
Color	Black
Material	Glass, Metal
Item Weight	4.55 Kilograms
Total USB 3.0 Ports	1
Other Special Features	Tool-less Installation, Integrated Cable Management

10. Warranty & Support

10.1. Warranty Information

The NZXT H2 Flow Mini-ITX PC Case comes with a 2-Year Manufacturer Warranty. Please retain your proof of purchase for warranty claims.

10.2. Customer Support

For technical assistance, troubleshooting, or warranty inquiries, please visit the official NZXT support website or contact their customer service team.

NZXT Store: Visit the NZXT Store on Amazon

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NZXT H2 Flow