I just bought a VSC-DNe ( A day/Night variable fan speed controller ) I want to run a space heater to kick on at night to keep my night temps from getting too cold. The only prob with this device is that it turns the ventilation fans completely off when it gets cool at night. I want the vent fans to run at a min speed to keep a neg pressure in the room to keep smell from escaping the room when the heater is doing its thing at night. Has anybody heard of a device that will do the same thing except throttle the fan down at night instead of off? I have been racking my brain to accomplish this. Thanks guys.