When using solar fan, should I crack windows? Leave button in ?

I leave my windows up, and the button on all year! Love the feature, and will keep the car as long as I can because of the roof.

Pixel XL ?

 

Why not get the Weathertech door window deflectors? Leave a crack w/o fear of water getting inside.
$115 at Priuschat shop; fair price and helps support PC operating costs.
Weathertech Side Window Deflectors for 2010-2015 Toyota Prius - PriusChat Shop

 

Why not just roll your windows all the way down and not use the solar feature?

 

I leave the button in all year long. The fan won't run if it's cool out/inside. If the interior heats up when it's cool out, the fan will cycle on and off, coming on to cool the interior, then shutting off until it warms up again.
I have the Toyota side window deflectors, and leave the front two side windows down about 1", though the ventilation will work with the windows up. It exhausts through the traction battery vent exhaust as well as through any "leaks" in the body with the windows up. It just has less restriction with the windows down a bit.

The only downside to the solar fan is the filter can get dirty faster. But it's easy to clean or replace.

 

or better yet save yourself about $100 and just get these. work and look great

Toyota-Prius-Window-Visor-Deflector

 

You can leave the windows open an inch or so when parked and most people can't even see they are open, AND rain won't get in. Fine dry snow -can- be blown in though if conditions are just right.
You can leave the windows open an inch or so when driving for extra ventilation and not get rain coming in or much noise as well. Though it is still noisier than when they are closed. In the city this is a "good thing" (tm), as I can hear morons doing dangerous things beside me.

I like to leave my two front windows open that inch or so when parked in the garage to reduce the crud buildup on the inside glass (it ventilates outside). When parked outside the solar fan helps with this.

The Toyota parts were $150 Canadian installed when I bought the car, and the new car Toyota warranty covers them. In fact on Pearl they started to come off. The dealer replaced them no charge. They are stuck on using tape. If you don't degrease properly and use the prep. solution they could come off after a year or two.

 

Not at all. They are at the top of the side windows. I can't even see them most of the time.

 

I have the Weathertech window visors. I love them, but they took a bit to get used to. The visors are in my line of vision for my side window mirrors. This may be due to my short height, as I'm only 5' tall. But it was worth the adjustment since the visors keep rain off of my side windows during the rain storms we frequently experience in the snow belt.

Pixel XL ?