The idea is, the air is cooled near where you need it, making them pretty efficient. Hopefully, as someone else stated, taking a bit of the load off of the main unit. Usage will increase, but our experience has been, not much. One important thing, it is my understanding that as a general rule these houses have little or no insulation above the lanai. Your installer will probably tell you this and offer to add it for additional money. I believe we paid $300. Also, while I am thinking about it, we had a realtor tell us you needed glass windows to get a permit. I don’t think that is correct.
|