The more readily accessible the equipment, the easier it is to install, maintain, and ultimately replace.
Working on equipment outside is great because you do not have to get into the home, unless you have no power or if the thermostat needs attention. More…
Putting equipment above ground level often results in wasps and fowls finding a place to make their nests.
Putting equipment on roofs becomes a pill for the maintenance person and the equipment now has an opportunity to leaking into the home.
Putting the equipment at ground level opens up the opportunity for small animals to chew the wires and make their home in it.
Installing the equipment in the home or a mechanical room keeps the wildlife out of the equipment and makes the environment safe for the technician to maintain it.