We have always used a heated mattress pad on our air mattresses. Like the above poster, we used the AeroBeds till we could no longer get what we wanted and switched to Coleman then Intek. Never had an issue. We did use a foam topper on the mattress and then the pad. After I had back surgery to correct my problems, we were able to switch to a Dynasty gel mattress which we love . We recently put a heated mattress pad on it. I was unsure using one on the gel, but I researched it. As long as we didn't put it up on high, it was fine. The pad we bought had a timer, so it shuts after so many hours, which you can set. Really like it.
Dale