2 step fan controller?

[rhetorrikz]

Hi , has anyone herd of something like this ? I hav seen temp controllers that use a thermostat to controll them but im wondering if theres a 2 step version? Like a fan speed controller and thermostat in one ? Ideally running a fan at lower speeds through the night and then ramping up through the day as temps rise?

 

[rhetorrikz]

Is it a bad idea?

 

[DRM Ranch]

Any on/off line voltage thermostat can do the job. Better ones can handle time based temperature drops, otherwise just manually change the temp at lights out.

As for altering fan speed, there are thermostats and controllers that can do that, they are typically far more costly so the decision to go that route might be based on them being cost effective in your situation. That would need to be figured out by you, I don't believe the difference is justified myself.