It is recommended that you don't mix APs with CleanAir with APs that doesn't support CleanAir.
This is because the CleanAir APs "talk" to each other when interferrence are detected. When CleanAir APs detect interferrence they change channel and power away from the interferrence. APs that don't support CleanAir can't do this. When one CleanAir AP changes power/channel, the other would react and if the APs don't support CleanAir, how do they do this? They can't and this stymies your wireless network.