Originally Posted by CHEESE_WAGON
Most rooftop units and mini-splits are thermostatically controlled to prevent over-cooling. However, the fans generally run non-stop when the unit is on whether the compressor is running or not.
I'm thinking this might be an issue that has not gotten that much attention. I'm thinking about HVAC issues from the perspective of someone who would be living in their bus. As I gain more and more experience with my current bus more and more questions come up. I really don't like humid spaces and I am mold sensitive so I am interested in keeping any space that I will be living in below 60% humidity. But just as I learned that the winter weather moves easily through my windows and so does the humidity in the warmer weather. I am slowly tightening up my bus. I removed five of my large 54 x 28" windows a few weeks ago and replaced them with some nice 18 gauge sheet-metal. I will be working to get the remaining windows to be less leaky. Sealing the doors, especially the main door is high on my agenda as well. I also have to think about making the right choices with regard to the HVAC equipment. I am retaining the factory air-conditioning and I'm planning to supplement it with what will probably be a pair of mini split units. It seems like the biggest question with any HVAC system is the question of sizing it correctly for to the climate and the structure. It seems that this is crucial because if you oversize your system and it cools your structure too quickly then it won't be able to do a good job of dehumidifying. Instead, if I understand this correctly, you want your AC to run almost continuously and to do so without over-cooling your space. When you have achieved this happy state you will also have achieved the conditions necessary for optimum dehumidifying. Good HVAC contractors do a lot more than just sell and install equipment, they really have to have some pretty good knowledge about the science and technology of what they're doing. I'm thinking it couldn't hurt to try to apply some of that knowledge to what we are doing with buses. I'm hoping others have also thought about this and can enlighten me.
Or, as I keep saying, maybe I just need to move to a place where the weather is more moderate than it is here in Southeastern Wisconsin.