Location

Location
Consider the affect of outdoor fan noise on conditioned space
and any adjacent occupied space. It is recommended that
the unit be placed so that discharge does not blow toward
windows less than 25 feet away.
The outdoor unit should be set on a solid, level foundation -
preferably a concrete slab at least 4 inches thick. The slab
should be above ground level and surrounded by a graveled
area for good drainage. Any slab used as a unit's foundation
should not adjoin the building as it is possible that sound and
vibration may be transmitted to the structure. For rooftop
installation, steel or treated wood beams should be used as
unit support for load distribution.
Heat pumps require special location consideration in areas
of heavy snow accumulation and/or areas with prolonged
continuous subfreezing temperatures. Heat pump unit bases
are cutout under the outdoor coil to permit drainage of frost
accumulation. The unit must be situated to permit free
unobstructed drainage of the defrost water and ice. A minimum
3" clearance under the outdoor coil is required in the milder
climates.