I have read them and plan on going ahead with it. I don't buy into the theory of weight on the roof. I would imagine a person walking on the roof would be heavier than a third air conditioner sitting up there. I would assume FR's issue is using the vent / fan opening for the a/c and someone cutting another hole in the roof to replace the fan?
The others who have installed them seem to have good success doing so.
Originally Posted by tmmar
There was a discussion about adding a 3rd air conditioner. Do a search and you should find it. If I remember correctly, I believe that FR doesn't recommend it because of weight on the roof and power issues.