The primary reason that Newell switched to roof airs was the difficulty in getting proper ducting from the basement to the ceiling as slides were added. However, now that basement airs are rarely used, it is a pain getting parts. In the early 1990's, Newell used Dometic basement airs. Finding parts for these is getting increasingly difficult. I have an evaporator fan motor that has packed up and it looks like I will have to find an electric motor shop that will rebuild it since I haven't been able to find a new one. In the mid 1990's, Newell changed to a system made by SCS. I don't believe SCS is still in business but, at this time, it may be somewhat easier to get parts for them.
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