Now on Mac too, free with the iPhone app: the fan speed in your menu bar, the full panel a click away. And Siri can stop it, speed it up, or say if it’s worth running.
Nightdraft puts your whole-house ventilation fan on your phone, as an instrument panel rather than a web page nobody wants to open.
Speed, airflow, power draw, run timer, and indoor, outdoor and attic temperatures, all on one screen. Speed up, slow down, stop, or add time to the timer with a tap. It refreshes on its own every thirty seconds, so what you're looking at is current. Siri and Shortcuts can do the same without opening the app — and tell you whether it's a good time to run.
IS IT EVEN WORTH RUNNING?
A whole-house fan pulls outside air in, so it only cools when it's genuinely cooler out there. Instead of showing you two temperatures to compare in your head, the app reads the difference and tells you: good time to run, marginal gain, or it would warm the house. It makes the same call for your attic, which the fan flushes through the roof vents — worth doing on an evening when the indoor gain is marginal, because a hot attic radiates down through the ceiling for hours.
BUILT FOR A DEVICE ON YOUR OWN NETWORK
• Talks directly to your controller over your home Wi-Fi. No account, no cloud service, no relay in the middle.
• Find My Controller searches your network for it, so you don't need to look up its address.
• An unreachable controller is never shown as a fan that's switched off. If the app can't reach it, it says so.
• Missing sensors are shown as missing, not guessed at. If your unit shipped without an outdoor probe, you can optionally fill that channel from a weather service — and readings from it are labelled, because a regional forecast is weaker evidence than a probe at your house.
• No analytics, no tracking, no advertising, no third-party code of any kind.
Also on Mac, in the menu bar, as part of the same app.
Requires a whole-house fan controller with the AirScape-style local HTTP interface, reachable on your home network. Nightdraft is an independent app and is not affiliated with or endorsed by any fan manufacturer.
Weather data by Open-Meteo.com.
Ratings & Reviews
5.0
out of 5
2 Ratings
Two new panel themes, in Settings: Seneschal and Seneschal Light, the main screen of PlumpBug's Seneschal app, with the fan's speed lit from teal through gold to crimson. Themes can now follow your phone's appearance: pick one of four dark/light pairs and the panel switches with it. Also, the demo timer survives a clock set back, and small fixes.
Version 1.3
The developer, Gregory M Koch, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Location
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More