Vento

Fan monitoring and control for Windows

⬇ Download Vento

_{Windows 10/11 · needs administrator rights for the fan sensors · updates itself from then on}

_{Or use the download page — one button, with the install steps.}

A lightweight fan monitoring and control panel for Windows that lives in your system tray.

Vento reads CPU/GPU temperatures and fan speeds through LibreHardwareMonitor and drives the motherboard's fan channels with five modes — including a Quiet mode that temporarily boosts the fans when things get hot and drops back down once they cool.

Features

• Live dashboard — CPU/GPU temperature with color-coded bars, 10-minute history sparklines, CPU / case / GPU fan RPM.
• Five fan modes — Quiet, Normal, Performance, Curve (temperature-based fan curve over 40/55/70/80 °C points), Auto (BIOS curve). Switchable from the window or the tray menu; the last chosen mode is restored at launch.
• Cooling boost (Quiet mode) — when CPU or GPU passes a threshold (default 75 °C) the case fans ramp up; once temps fall below the resume threshold (default 65 °C) they return to Quiet speed. Hysteresis prevents oscillation.
• Game boost — sustained GPU load (default >80 % for 30 s) switches to Performance automatically and returns to your previous mode after 2 minutes of idle, with a configurable post-game cooldown (default 15 s of extra full-speed cooling) before handing back. Forgetting to change modes before a game is no longer a problem.
• Mode panel — the dashboard shows the active mode's settings right under the mode selector: fan percentages, boost temperatures, or curve points depending on the mode. Slider changes apply to the fans instantly, and a Reset button restores that mode's defaults. A live graph tracks CPU and case fan RPM over the last 10 minutes.
• Start with Windows without UAC prompts — offered as a checkbox in the installer and in Settings. It registers a highest-privilege scheduled task, so logon skips the elevation dialog; the app starts 15 s after sign-in and repoints the task at itself if the folder ever moves.
• Auto-update — checks GitHub Releases at launch; one tray click downloads the new installer and updates silently.
• Safety guard — in any manual mode, if CPU/GPU exceeds a hard limit (default 85/83 °C) Vento forces Auto and notifies you.
• System tray — close/minimize hides to tray; tray tooltip shows live temps; right-click menu switches modes; optional start-minimized.
• Customizable — fan speeds per mode, boost thresholds, safety limits, update interval, accent color, tray behavior. All in the in-app Settings panel, persisted to settings.json.
• Portable — a folder, a script, and the sensor DLLs. Nothing is written outside the app folder, except the optional "Start with Windows" scheduled task and update downloads in %TEMP%.

Requirements

• Windows 10/11, PowerShell 5.1 (built in)
• Administrator rights (required for SuperIO sensor access)
• .NET Framework 4.7.2+ (built into Windows 10/11)

Getting started

Installer (recommended): download VentoSetup.exe and run it. You get Start Menu / desktop shortcuts, a run-at-startup task (checked by default, changeable later in Settings), and a clean uninstaller.

From source: clone the repository and double-click Vento.vbs (or build Vento.exe, see below), then accept the admin prompt.

Building

No SDK needed — everything uses tools already on Windows (plus Inno Setup for the installer):

build\make-icon.ps1     # regenerates assets\vento.ico + assets\logo.png
build\build-exe.ps1     # compiles Vento.exe (launcher with icon + UAC manifest)
ISCC.exe installer\vento.iss   # builds dist\VentoSetup.exe (Inno Setup 6)

Release history is in CHANGELOG.md.

Configuration

Everything editable in the UI is stored in settings.json (created on first save). Two extra keys are file-only, for remapping which SuperIO channels drive which fans on your board:

{
  "cpuFanChannel": "Fan #1",
  "caseFanChannel": "Fan #2"
}

If a named channel doesn't exist, Vento falls back to the first/second fan channel it finds. All remaining channels are left on the BIOS default curve.

Safety notes

• The case fan hub is never driven below 20 %, the CPU fan never below 30 %.
• On exit (including crashes) all fan channels are handed back to the BIOS.
• Vento refuses to run alongside FanControl — two programs writing to the same SuperIO registers is a bad idea.

How it works

One script, two threads: an MTA runspace owns LibreHardwareMonitor exclusively (polling sensors and applying modes), while the STA thread runs the WPF window and tray icon. They communicate through a synchronized hashtable — the UI never touches the hardware directly.

License

Vento is MIT-licensed — see LICENSE. Bundled third-party libraries in lib/ (LibreHardwareMonitorLib and dependencies) have their own licenses — see THIRD-PARTY-NOTICES.md.