Forum Discussion

StirCrazy's avatar
StirCrazy
Moderator
Mar 14, 2023

is anyone using one of these AC units?

hi I reacently stubbled across the Fresair web page and was looking at THIS unit. has anyone used an evaporative AC before and how did it work.

I am looking at this for on the camper (no ac or 120V yet) and it would only be a once and a blue moon thing as normaly I am high enough in the mountians to not worry about AC. With the ability to install it in an exsisting 14x14 vent and the low power usage (less than 8amps DC at full power) and the fact it doesnt need pure water so well water or what ever is at the campground would be fine...

Thanks
Steve

23 Replies

  • wa8yxm's avatar
    wa8yxm
    Explorer III
    Not that unit but a portable
    They work well if the humidity is low Very well in the desert.

    When I used mine I had three issues.. Limited electricity (NOT on grid) Low humidity and heat... Thus the portable (Which adds humidity to the room air) was ideal.. The humidity was so low I had to use saline spray in my nose. That's very dry air.. So the unit dropped my bedroom a good 10 degrees F and raised the humidity.

    The rooftop units.. I believe use a heat exchanger so the moist air goes outside. But they work well on very low power consumption Provided it's DRY out... Here in Michigan where it's often 30% humidity or more.. Not so well.
  • Evaporative coolers aren’t much good unless the air is bone dry where you are.
  • 3_tons's avatar
    3_tons
    Explorer III
    StirCrazy wrote:
    hi I reacently stubbled across the Fresair web page and was looking at THIS unit. has anyone used an evaporative AC before and how did it work.

    I am looking at this for on the camper (no ac or 120V yet) and it would only be a once and a blue moon thing as normaly I am high enough in the mountians to not worry about AC. With the ability to install it in an exsisting 14x14 vent and the low power usage (less than 8amps DC at full power) and the fact it doesnt need pure water so well water or what ever is at the campground would be fine...

    Thanks
    Steve


    In my view 7-8 amps seems rather high for a evaporative cooler (if I have this right??), and it cost more than a smaller rooftop air conditioner…I see little advantage…

    For example, my Coleman 11k btu Mach 1 P.S. uses about 9-9.5 amps with 2 speed fan on low speed, which does a good job, though the fan is a bit noisy…660w of concurrent rooftop harvest (and another 360w ground deployable when stationary off-grid) along with 400a Lithium has been a reasonable combination - Honda 2200 just as a backup, but (except for a periodic run) haven’t used it for air conditioner…

    https://www.youtube.com/watch?v=HsgmSaDWUWo

    3 tons