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H2 Flow
Mini-ITX Airflow Case
Key Specs
Dimensions (H x W x D): 435 x 181 x 263 mm (17.1 x 7.1 x 10.4 in)
Volume: 20.7 L
Motherboard Support: Mini-ITX
GPU Clearance: Up to 331 mm (13 in)
CPU Cooler Clearance: Up to 75 mm (3 in)
Front I/O: 2x USB 3.2 Type-A, 1x USB 3.2 Gen 2x2 Type-C, 1x headset jack
Inside the Box
H2 Flow
F120Q (Case Version) x2
Installation Accessories
User Guide
Warranty & Return Policy
Warranty coverage — See NZXT warranty terms by product
Returns & exchanges — NZXT components and accessories are sold through authorized retailers. Start a return or exchange with the retailer you purchased from.
Warranty service — Submit a request to NZXT Support. Proof of purchase from an authorized NZXT retailer is required.
Resources
Overview
The H2 Flow is a mighty, compact vertical mini-ITX case designed to save space while showcasing top-tier components. Smart cable management, tool-less access, dual top fans, and a premium PCIe 5.0 riser cable make the building experience fast and simple.
- Liquid Cooling Support: Handles up to a 280 mm radiator, ensuring lower temperatures so system performance consistently thrives.
- 331 mm GPU Capacity: Fits modern graphics cards with ease, delivering top-tier power in a clean, compact 20.7 L footprint.
- Ultra-Fine Mesh Panels: Mesh on all sides maximizes air intake while filtering dust, keeping core components clear and running optimally.
- Hybrid Glass-and-Mesh Side: Unique two-piece panel features tempered glass and mesh, displaying the build without compromising thermal efficiency.
- Two F120Q CV (3-pin DC) Fans Included: Two pre-installed 120 mm fans on the top deliver convenient and immediate exhaust.
- Tool-Less Access Panels: Panels pop off without tools, making every upgrade, cleaning session, or adjustment quick and completely seamless.
- Integrated Cable Routing: Built-in routing points and included Velcro straps simplify organization, leading to a much tidier look and superior internal airflow.
- PCIe 5.0 Riser Cable: A premium riser cable is included, making vertical GPU mounting easy while providing reliable, lightning-fast bandwidth.
Mighty View. Mini Case.
The H2 Flow redefines compact power by visualizing it, packing high-end components and liquid cooling support into a sleek vertical design that frees your desk space. Every detail is engineered to simplify your build and keep your system cool and quiet.
Compact Size, Full Power
The 20.7 L vertical layout saves desk space, fitting full-power features in a footprint smaller than a standard sheet of paper.
Two F120Q Fans
Get convenient, quiet airflow with two F120Q CV (3-pin DC) 120 mm fans pre-mounted and ready to work on the top panel.
PCIe 5.0 Riser Cable
An included premium PCIe 5.0 riser cable ensures clean GPU mounting while providing reliable, lightning-fast bandwidth.
Cooling, in Full View
Supports up to a 280 mm radiator, showcasing LCD coolers through a hybrid glass-and-mesh panel.
Spacious GPU Support
Accommodating graphics cards up to 331 mm, it delivers strong performance and steady high frame rates, all while maintaining efficient airflow and room to spare.
High-Airflow Panels
Ultra-fine mesh ensures steady airflow while keeping dust out for smooth, reliable performance.
Effortless Building
Building and maintenance are made simple with tool-less panels and smart wire management interior.
Tech Specs
General
- Enclosure Type
- Small form factor case
- Motherboard Support
- Mini-ITX
- Back-Connect Motherboard Support
- No
- Power Supply Type
- SFX, SFX-L
- Materials
- Steel, tempered glass
Dimensions
- Dimensions (H x W x D)
- 435 x 181 x 263 mm (17.1 x 7.1 x 10.4 in)
- Volume
- 20.7 L
- Weight
- 4.55 kg (10.0 lb)
Clearance
- CPU Cooler Height
- Up to 75 mm (3 in)
- GPU Length
- Up to 331 mm (13 in)
- GPU Thickness
- Up to 65 mm (2.6 in)
- GPU Width
- Up to 150 mm (5.9 in)
- PSU Length
- Up to 130 mm (5.1 in)
- Front Radiator + Fan Thickness
- Up to 60 mm (2.4 in)
Front I/O
- USB 3.2 Type-A
- 2
- USB 3.2 Gen 2x2 Type-C
- 1
- Headset Jack
- 1
Expansion & Drives
- Expansion Slots
- 3 (vertical)
- 2.5" Drive Bays
- 2 (Up to 8.5 mm)
- 3.5" Drive Bays
- 0
Cooling Support
- Front Fans
- 2 x 120 mm / 2 x 140 mm
- Top Fans
- 2 x 120 mm
- Front Radiator
- Up to 280 mm
Included Fan Specs
- Model
- F120Q (Case Version)
- Quantity
- 2
- Speed
- 1,350 ± 150 RPM
- Airflow
- 60.2 CFM
- Static Pressure
- 1.05 mmH₂O
- Noise Level
- 24.1 dBA
- Fan Connector
- 3-pin
Cable Management
- Fixed Velcro Straps
- Yes
- Included Zip Ties
- Yes
Riser Cable
- Compatibility
- PCIe Gen 5.0 x16
- Length
- 260 mm
Product Info
- Warranty
- 2 years
- Model Number
- CI-H21FW-01 (White) / CI-H21FB-01 (Black)
- UPC
- 810074848398 (White) / 810074848404 (Black)
- EAN
- 5056547208794 (White) / 5056547208800 (Black)
Frequently Asked Questions
Can I install a full-sized graphics card?
Yes. The NZXT H2 Flow supports graphics cards up to 331 mm in length and 65 mm thick (3-slot), including cards such as the NVIDIA GeForce RTX 5090 Founders Edition (304 mm) and AMD Radeon RX 9070 XT models (288–330 mm).
GPU clearance is measured using a standard graphics card profile. When installing front-mounted AIO cooling with a larger tube cover—such as the NZXT Kraken Elite—available GPU width clearance may be reduced.
Some modern GPUs feature wider coolers, extended shrouds, or repositioned power connectors that require additional clearance. Radiator thickness, tube cover size, and breakout cable placement can also affect fitment. As a result, some wider GPUs may contact the radiator, tubing, or cables even if their listed length is under 331 mm. Please check your GPU’s width dimensions and plan accordingly. Alternatively, the radiator can be installed at the front of the case with the fans positioned behind it in a pull configuration, which may provide additional clearance around the radiator fittings and tubing.
Does the H2 Flow support air cooling for the CPU?
Although the H2 Flow is designed primarily for liquid coolers with LCD screens—supporting front-mounted radiators up to 280 mm—a low-profile air cooler can also be used. Please note the 75 mm CPU cooler height clearance, and allow at least 10 mm of space between the top of the cooler and the glass panel.