NZXT H9 H3 Flow Midi Tower Black
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Overview
- 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.
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).
7-Fan Capacity
Supports up to 140 mm fans (two front, two top) and 120 mm fans (two bottom, one rear).
Radiator Ready
Supports a 280 mm front radiator and a 240 mm top radiator for versatile cooling setups.
Back-Connect Ready
Compatible with ASUS BTF and MSI Project Zero motherboards for a clean, cable-free build.
Tool-Free Access
Easily remove panels for building, upgrading, or cleaning.
Easy Cable Management
Integrated cable channels and tie-down points make routing clean and simple.
Specifications
Design
| Maximum PSU length | 18.5 cm |
|---|---|
| Maximum graphics card length | 37.7 cm |
| Maximum CPU cooler height | 17 cm |
| Cable management | Yes |
| Tempered glass panel(s) | Yes |
| Side window | Yes |
| Number of expansion slots | 4 |
| Number of 2.5" bays | 3 |
| Number of 3.5" bays | 1 |
| Supported motherboard form factors | micro ATX, Mini-ITX |
| Product colour | Black |
| Material | Mesh, SGCC, Tempered glass |
| Type | PC |
| Form factor | Midi Tower |
Power supply
| Number of power supply units | 1 |
|---|
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Ports & interfaces
| Combo headphone/mic port | Yes |
|---|---|
| USB 3.2 Gen 2x2 Type-C ports quantity | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 1 |
Cooling
| Top radiator sizes supported | 240 mm |
|---|---|
| Front radiator sizes supported | 280 mm |
| Bottom fans diameters supported | 120 mm |
| Number of bottom fans supported (max) | 2 |
| Top fans diameters supported | 120,140 mm |
| Number of top fans supported (max) | 2 |
| Rear fans diameters supported | 120 mm |
| Number of rear fans supported (max) | 1 |
| Rear fans installed | 1x 120 mm |
| Front fans diameters supported | 120,140 mm |
| Number of front fans supported (max) | 2 |
Storage
| Supported HDD sizes | 2.5,3.5" |
|---|
General
| Product family | H9 |
|---|
Weight & dimensions
| Weight | 4.8 kg |
|---|---|
| Height | 400 mm |
| Depth | 389 mm |
| Width | 225 mm |
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Customer reviews
Delivery & returns
Delivery
- FREE standard delivery on orders over £50, otherwise £4.95 (3–5 working days).
- Express delivery £9.99 (1–3 working days) on selected products, UK mainland.
- PlayStation and Arozzi products use a 5–7 working-day service.
- Orders are processed within 24 hours, Monday to Friday excluding bank holidays. All deliveries must be signed for.
Returns
- Changed your mind? Tell us within 14 days of receiving your item, then return it within a further 14 days, unused and in its original packaging. A minimum £9.99 collection fee applies.
- Faulty or damaged on arrival? Contact us within 48 hours of delivery.
- Custom-built PCs can only be returned if faulty. Opened headphones, earphones and AirPods can't be returned for hygiene reasons.
