Rear AC vent airflow?

[Lightsped]

Should the rear AC vents be putting out as much air as the front vents? When have the AC or heat on there is barely any air coming out of them. Have tried with AC in the various airflow modes (3rd knob on the right) on the controls.

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[Xcoaste]

You wont get as much air in the rear as in the front. I have to turn the fan speed up pretty high to feel it come out of the rear.

 

[Retrograde]

Yeah... they don't do much. Their sole purpose is to sell Jeeps to families...

Me: "Look Honey, it has air conditioning for the children."
The wife: "Squeeeeeee!"

 

[Heimkehr]

The HVAC tubing run to the rear seats, via the center console,* would need to be properly molded in an ever-decreasing circumference in order to provide increased air flow. IOW, it would need to mimic the ductwork leading from the furnace to the rest of one's house.

Having seen what said tubing looks like under a partially disassembled center console, it's evident that it's too wide leading up to and at the exit point to compress (and thus increase) the flow of conditioned air sufficiently to get anywhere close to what exits from the dashboard vents. With this in mind, I'm content with the air flow that the upper rear vents do manage to provide.

*Remember that there are other mouths to feed, also, in the form of floor vents under the front seats.

 

[Lightsped]

Never realized there were vents under the front seats? Are they putting out more air than the portion behind the console?

 

[XJfanatic]

Under the front seats is for the heat/floor position up front.

mine put out pretty decent air for console a/c but nothing like a dedicated blower in other vehicles.

 

[Headbarcode]

It's simply the result of the conditioned air following the path of least resistance.

For a well balanced system, 2 things are required. Velocity and volume. First is decreasing the size of the duct work to maintain air velocity. Second is adjustable butterfly valves at each split in the duct work. Choking down the airflow in the legs closest to the supply will ensure that enough volume is farther from the supply. I'm HVAC-R certified but never brought the knowledge out into the field. Nothing against that industry. Just simply got a much better offer to run a different business.

 

[The Fixer]

I believe the rears work best with the switch set to dash vent only, not split between the dash and floor. My kids would let me know if they were too hot or too cold LOL.

 

[Wbino]

Just tell those in coach that air is only for those in 1st class. ?

 

[Heimkehr]

I believe the rears work best with the switch set to dash vent only, not split between the dash and floor.

Yep. That's been true for every vehicle I've owned with rear vents, including the JLU.

Just tell those in coach that air is only for those in 1st class. ?

I'm going to use that one.

 

[Headbarcode]

Just tell those in coach that air is only for those in 1st class. ?

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