Why it matters to you
Packaged units suit homes and small commercial buildings without attic or closet space for an indoor air handler, and they are common as rooftop units on Greater Houston offices and retail buildings. Because every component sits outdoors, the whole system is exposed to sun, Gulf Coast humidity, storm debris and, on ground pads, flood water.
Practical guidance
Keep the cabinet clear of vegetation and debris and change the filter on schedule. After flooding or storm damage, have a licensed technician inspect the electrical and any gas components before the unit is restarted.