Run Fan for X Minutes?

One of the features I miss from my Nest thermostat is being able to, on-the-fly, run my house fan for a predetermined amount of time. Sometimes when the house felt a bit stuffy, I just wanted to run the fan for an hour or two. What's the easiest way to accomplish this with Hubitat?

You can send custom commands in RM4. Use a virtual switch as the trigger and have it auto off after 30 minutes. That way you can use voice commands.

"Hey Google blow me"

"Ok, Google I'm done"

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lol - I like that, but I'd like to be able to say run for X minutes or hours somehow so I don't need to remember to turn it off.

You can use a virtual dimmer and set it to X% via voice and use that as the run time in minutes in the rule.

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By pushing a button, dashboard, or what method? It looks like voice is out, so you must have some preferred method to activate this?

I use a virtual switch timer for this sort of thing

I have a virtual switch automatically turn back on (or off) after a preset time

“Alexa, turn off the speakers”
This turns off a virtual Switch that controls all my voice announcements
After 90 mins, it auto turns back on again.

I link the virtual switch to the actual switch with an app to make the actual switch follow the vitual

Driver & app are both on my website
Https://Cobra-apps.co.uk

Andy