Evergreen Azaleas are a type of Rhododendron; they are usually small – under 2-3’. The main difference is botanical which I am not qualified to discuss but I think it has something to do with the number of flowers in a cluster.
Here are some Azaleas at Dawn Gardens. They are irrigated with 2 emitters each. In the summer I set a sprinkler over them for a few hours once a month (July and August). They do not have misters like the evergreen Rhododendrons (see May 25th post).
Rhododendron ‘Sherwood Red’