Yeah I mean in this literal instance having both could have helped, but there’s not a group of people explaining why “journalism school” is a harmful term that shouldn’t be used even for points of clarification.

So.... We should believe the makers of those “gasoline saving electronic plug into your OBD port” devices just because they say it will work?

Holy fuck, you’re about as toxic a poster as I’ve ever seen.

Hey, don’t knock the “common wrencher.” This guy clearly has no idea what he’s talking about, or he’s done so many AC retrofit kits, he has no idea how OEM AC is set up.

WOW! You can install something? Holy shit you must be able to engineer it, too! You totally know what you’re talking about then!

Can’t comment on the rest, but you don’t understand what relative humidity means.

Actually pretty much EVERY car that has A/C can use both heat and A/C at the same time. They are two different systems. The heat in almost all cars comes from the coolant in the engine cooling system which is why the engine needs to heat up before the heater starts working. There is a small radiator under the dash…

The AC coil on all cars I’ve seen (which is a pretty wide cross section) is in the same box as the heater core. When you simply turn on “defrost” in basically any car on the road now, the air conditioner runs (this is even true in my 1985 car with factory air; my older stuff didn’t come with AC - I added it).

1. The car I’m sitting in right now kicks the AC circuit on whenever I select front defrost. Most cars do.

Look at your car climate control settings.

You know nothing dude.

The a/c evaporator core is downstream of the heater core, so you may indeed do both at the same time. Newer vehicles don’t even give you the option, defrost mode automatically turns a/c on whether you want it or not.

My Hyundai Elantra can run A/C and heat at the same time. And winter air is drier than summer air. So... what the fuck are you talking about?

Ummmm...what? I’ve never seen a car that can run A/C and heat at the same time.

jesus. ever notice that the a/c and the temperature controls are different buttons/dials/whatever in the car? there’s a reason for that.

47% humidity is the relative humidity. relative to how much it could ever hold at that temp. 

User name checks. I apologise if you were being sarchastic and I missed it, but how do you know enough about automotive air conditioning (or anything that utilizes a basic refrigeration cycle) to know the underhood heat exchanger is called the condenser and not know there is a matching heat exchanger, called an…

1. Air in your car is circulated through the entire AC system so the location of the AC coil is irrelevant.

He explains that in the video. Winter air, being cold, has a lower capacity for humitdity than warm air, ergo it will be *dryer*.  “Dry” in this context is obviously a relative term.

Winter air is cold. Cold air holds less moisture than the warm air inside the air. When you heat up the cold air from outside, the relative humidity drops.