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bobkatmsu's avatar
bobkatmsu
Explorer
May 13, 2016

A/C or de-humidifier?

Here in Florida, our brutal summer of heat and humidity is about to begin. My question is which is better, running the A/C or running a couple of dehumidifiers. I pay a flat fee for the electric hook up so cost of electricity is not an issue. I guess my concern is even if I set the a/c to 90, it still would be running 20 hours a day for the next 4-5 months. Seems like it would shorten the life of the a/c unit. If I were to use dehumidifiers I would set one in shower, the other would be placed in the kitchen to drain into the sink. I would then leave the grey water valve open to drain onto the ground. That's my idea anyway. Any thoughts. Thanks.

26 Replies

  • Sez Hoo! wrote:
    my 2 cents. I have a degree in HVAC I worked a/c service for years. Its harder for your a/c unit to remove the moisture (humidity) than it is to change the air temp. Run the dehumidifiers you will find that your a/c will be able to keep up with the heat load if they're operating properly.


    I believe the OP was asking an "either or" question about if a dehumidifier would keep him as comfortable as just the AC unit.
    Just a dehumidifier will not work with Florida's high humidity AND high temperatures, especially along the coast.
  • my 2 cents. I have a degree in HVAC I worked a/c service for years. Its harder for your a/c unit to remove the moisture (humidity) than it is to change the air temp. Run the dehumidifiers you will find that your a/c will be able to keep up with the heat load if they're operating properly.
  • De-humidifiers would work great, but create too much heat with no practical way to vent them directly to the outside. Running them would just cause your A/C to work that much harder. :@
  • I live in Florida and the only time I use a dehumidifier is during the cool months when it is too cool for the AC and not quite cool enough for heat. A properly sized AC unit will remove more moisture and not add heat to the area. A dehumidifier will only lower the humidity somewhat and, in the best case scenario, will not lower the temperature.
    You need to run the AC unit as much as it takes to keep you comfortable. The humidity down here can be around 80%+ and just opening one door will allow a bunch of moist air in to your coach.
    Run your AC and maybe a fan or two to move the air inside the coach. With air movement you can keep the temperature a little warmer.
  • I ran my AC all summer every year in Orlando. I also had a dehumidifier with grey tank open. Cheaper to replace an AC every 7 or 8 years than fix all the heat related damage.
  • This question was previously addressed on the forum. My immediate thought was, a dehumidifier would generate too much heat.

    I was corrected by a Florida resident who said a dehumidifier takes more moisture out of the air than A/C. And, the small amount of heat generated by the dehumidifier is easily overcome by the A/C.

    I don't have enough experience in the Florida heat/humidity. But now, to me, it makes sense to run a dehumidifier along with the A/C.