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Thread: Over-the-road air??

  1. #51
    Join Date
    Mar 2006
    Location
    Santa Barbara
    Posts
    3,177

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    Several times passing thru Arizona in the summer, temp is over 100, and its 72 inside the Coach. I didn't even think about it until stopping at a rest stop and stepping outside into a heat wave.
    Gary & Lise Deinhard, 2003 Elegant Lady Liberty, Dbl slide

  2. #52
    Join Date
    Jan 2006
    Location
    Nichols Hills
    Posts
    2,465

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    My PHX trip was in the new bus. The Palm Springs trip was the inagural trip on the XL when we bought it in San Diego. I was a dumb as a box of Loc but made it home anyway.

  3. #53
    Join Date
    Jan 2006
    Location
    Pinehurst
    Posts
    950

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    That's way harsh.

    Loc - 2008 Marathon XLII - Houston

  4. #54
    Join Date
    Mar 2021
    Location
    Parkland
    Posts
    12

    Default New very high efficiency belly air inverter technology

    The question is why they don't install ultra compact inverter
    belly AIR CONDITIONING units? 24V directly from a nice lithium battery bank, this way the alternator can keep up with the load at cruising, less belts and systems to go wrong, conform air Cond idle law, no noise, solar, generator by charging the batteries the same way we do on boats..

  5. #55
    Join Date
    Apr 2019
    Location
    Arlington
    Posts
    752

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    Might be fun if the make them air cooled? All of the marine type units that I have seen are raw water cooled. And I have never seen one that has the capacity of the OTR units.


    Mark and Debbie Fratto
    1998 Parliament

  6. #56
    Join Date
    May 2012
    Location
    Beverly Hills
    Posts
    4,652

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    Quote Originally Posted by Mabruteam View Post
    The question is why they don't install ultra compact inverter
    belly AIR CONDITIONING units? 24V directly from a nice lithium battery bank, this way the alternator can keep up with the load at cruising, less belts and systems to go wrong, conform air Cond idle law, no noise, solar, generator by charging the batteries the same way we do on boats..
    What's the manufacturer and model?

    I've only seen one coach with DC powered air conditioners. They were 48VDC roof air units. The problem with DC powered is the huge current demands. A much gem higher voltage is needed. My new home unit has a 400V DC fan motor.

    I'd like to see a mini-split with a ducted or floor standing indoor unit that it's 120VAC powered. I've looked at every manufacturer that I can find and none offer one.


    Gil and Durlene
    2003 H-3 Hoffman Conversion

  7. #57
    Join Date
    Dec 2019
    Location
    Brodheadsville
    Posts
    250

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    I concur with the OTR A/C as our liberty is so equipped. Cool as a cucumber going down the super slab! Only draw backs are it does affect your MPG slightly,it is rather noisy when parked with the RPM elevated and if you happen to hit a patch of road that is unpaved it creates an enormous cloud of dust. We have an unpaved portion of road leading up to our getaway property and we shut off the OTR for the last mile to to avoid a dust storm. Aside from that you learn to live with the tiny draw backs. The loss of primarily 2 bays is not even worth mentioning in our situation.
    1995 Liberty XL
    Chris & Sara Jo Behrens

  8. #58
    Join Date
    Apr 2019
    Location
    Arlington
    Posts
    752

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    Gil, I am not sure what you have in mind, but you might look at some of the new VRF systems. While the evaporator units were initially very small, they are making larger and more substantial evaporators with a fair amount of static pressure to push duct work every day. I don't see why you couldn't adapt one of these to a vertical orientation (if they dont already have one). It might take some case work or making your own case.


    Mark and Debbie Fratto
    1998 Parliament

  9. #59
    Join Date
    Dec 2020
    Location
    Tualatin
    Posts
    9

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    Jon, Do you have a ballpark figure on how many pounds of refrigerant an OTR system requires?

    I have a 1994 Marathon (#0280) with both Cruiseair and OTR.

    Thanks,

    Ben

  10. #60
    Join Date
    Mar 2021
    Location
    Parkland
    Posts
    12

    Default 24v air conditioning

    RV air conditioning is a mystery to me, after 40 years designing units for the marine industry I found all the bay units to be far from efficient, the roof top are also far from efficient, Why not go for variable speed dual inverter 24v compressors, they are quiet, compact low profile and efficient. All that coupled with a lithium Po4 battery bank, will simplify the complete setup. I started already and I will be testing on my old new to me XL45 Marathon.

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