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Window Air or Air Conditioning?

Garlan Garner

Banned
Mar 31, 2016
11,351
7,526
Chicagoland
Anyone know which is more efficient in an EV?

Would rolling down the window on the highway be less/more efficient than running the air conditioner?

Anyone have any concrete factual opinions?
 

Skotty

2014 S P85 | 2020 3 P19"
Jun 27, 2013
2,528
1,963
Kansas City, MO
Myth Busters found that using A/C is more efficient at highway speed, but then their testing methodology is often flawed. I think they might have been accurate on this one though.

Yeah...so no. No concrete factual response here. lol.
 

Brando

Active Member
Sep 27, 2016
3,009
2,245
Bainbridge Island, WA
Best two choices are

1- Fresh Air thru the vents with your windows closed (closed windows better aerodynamics
2- Air Conditioning with your windows closed - same reason as above

How do you decide? based on your comfort level. If fresh air is OK - lowest energy use.

Tesla clubs could run some actual road tests? Is the difference even measurable by mere owners?

Open windows are fine/great when aero doesn't matter ~< 50 kph - like when site seeing in parks.
 

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