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Compact black micro-ATX case with fine mesh panels and tempered glass side panel

NZXT

NZXT CC-H31FB-01 H3 Flow Micro-ATX PC Case Black

SKU CH-C1CZ-TM0AD MPN CC-H31FB-01

A space-saving micro-ATX chassis with ultra-fine mesh panels, a pre-installed 120 mm rear fan, and support for 280 mm front and 240 mm top radiators plus full-length GPUs up to 377 mm

  • Side panel type1 x Side Tempered Glass Panel
  • Included fansRear - 1 × 120 mm
  • Product colorBlack
  • Product typeATX Mid Tower
  • Product dimensions15.75 in × 8.86 in × 15.31 in
  • Space-saving micro-ATX footprint fits high-performance parts in 15.75" x 8.86" x 15.31" frame
  • Ultra-fine mesh panels and ventilated PSU shroud maximize airflow while filtering dust effectively
  • Supports 280 mm front and 240 mm top radiators plus up to seven fans for powerful cooling
  • Fits full-size GPUs up to 377 mm, 352 mm with front fans, or 317 mm with radiator
  • Pre-installed 120 mm rear exhaust fan and back-connect motherboard readiness simplify clean builds

Compact micro-ATX chassis for high-performance

The NZXT H3 Flow CC-H31FB-01 is a space-efficient micro-ATX case designed to house full-sized components in a smaller footprint. Ultra-fine steel mesh on the front, top and side panels maximises airflow while filtering dust. A ventilated PSU shroud further optimises intake from bottom-mounted fans. One 120 mm rear fan is pre-installed for immediate exhaust performance.

Ideal for air or liquid cooling in tight spaces

Builders who want a compact chassis with extensive cooling support will appreciate room for up to seven fans and radiators up to 280 mm at the front and 240 mm at the top. The case also fits graphics cards up to 377 mm long when no front fans are used. Users who need E-ATX motherboard support or more than seven fan mounts should consider a larger form factor.

GPU length changes with front cooling configuration

Maximum graphics card length is 377 mm without front fans, 352 mm with front fans installed and 317 mm when a front radiator and fans are both fitted. This single variable determines whether your chosen card will fit.

How it compares

Measured against everything we stock in Tower & Desktop PC Cases, at today’s prices. Recalculated every night.

Price $72.99
Cheaper than about 70% of the 1,468 comparable items (median $100.99).

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Specifications

Product
Brand nameNZXT
Product lineH3 Flow
Part numberCC-H31FB-01
Product colorBlack
Product typeATX Mid Tower
Size & build
Side panel type1 x Side Tempered Glass Panel
Product dimensions15.75 in × 8.86 in × 15.31 in
Shipping weight0.45 kg
Package size25 × 25 × 25 mm
More details
Included fansRear - 1 × 120 mm

Questions about this item

What GPU length fits when I run a front radiator and fans?

The case allows a graphics card up to 317 mm long when a front radiator and its fans are installed.

How loud does the pre-installed 120 mm rear fan get under full load?

NZXT rates the included F120Q CV fan at 31 dBA at maximum speed, so it stays quiet even during extended sessions.

Which motherboard form factor is required for the back-connect feature?

A micro-ATX board with rear-mounted connectors such as ASUS BTF or MSI Project Zero is needed to use the back-connect routing.

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