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Old 05-21-2013, 10:45 AM   #1
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Dash A/C upgrade

I have seen a MH with air vents under the couch that were hooked to dash air and heat. I was thinking of trying this out. Maybe hook into one of the ducts and add an inline bilge blower.
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Old 05-29-2013, 09:56 PM   #2
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Let us know how it works out.
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Old 05-29-2013, 11:01 PM   #3
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jml, are you trying to add heat/AC to the rear that is being supplied from the dash unit
or
visa versa?

Most dash units are marginal at best. They are not going to do much for comfort in the rear of the coach.
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Old 05-30-2013, 09:29 AM   #4
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I was thinking of adding 2 vents directly behind the drivers seat at the base of the couch. I would maybe use a 3" inline 12v blower to add more air flow. The problem I foresee is that the blower will pull air from the dash vents and not from the intake
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Old 05-30-2013, 09:50 AM   #5
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jml, is your dash air is marginal now?...I doubt seriously you will gain anything but a lot of lost time/effort.

So many of these RVs have what is known in the industry as "aftermarket", after thought", "afterbirth" AC systems. Most all have been done in the cheapest and easiest method....due to the RVs having supplemental HVAC systems.

Dash air inefficiency is a common complaint with Class A's

Before diving in head first...can you do yourself an experiment? Use an extra fan to blow AC from the dash vents to the rear when driving and see if you gain anything.

Most RV AC's are undersized to begin with and or combined with a shoddy install....tend to be lack lustre in performance.

Stick a good thermometer in a center dash vent and go for a ride...run blower speed on high....monitor the outlet temp.....if the temp is not low 40s to upper 30s..I feel your wasting your time
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Old 05-30-2013, 09:59 AM   #6
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I agree with you. It was just an idea I was tossing around.
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