Max,
  I wasn't aware those units needed venting,makes sense though as I wondered how the hot air was handled!
   I don't think it would be too difficult to vent a unit though,checked the utube vid and that looks like a simple operation to change out.  I've looked at the dysons and they are great fans but......  I first noticed them a few years back in F1 racing!!!  the drivers used small ones to keep cool,or to have a breeze.... 

  Max do you have a dehumidifier?  reducing the humidity can make it feel cooler even if the temp stays the same.
   I have a 2 and 1/2 ton Frigidaire HAVC unit to cool my house,of course up in Canada we only need to run it 1 or 2 days a year!!!! 

    Ya right it's 90 degrees outside right now!!!    
