User Manual Whynter ARC-122DHP Elite 12000 BTU Dual Hose Digital Portable Air Conditioner

This item does have a temperature sensor on the coil to sense
freezing and shut off the compressor until defrosted.

When the set temperature is reached, the compressor shuts off
but the fan runs continuously on low speed to circulate the air
in the room to maintain the set temperature and prevent the
compressor from running too frequently.

The two window tubes are approximately 4 inches and 5
inches in diameter. They both terminate in a thin plastic
plate which is about six inches high and expands in length
from between 15 to 24 inches (or so). The plate is designed
to fit in the slot space below the opened window to seal
between the window frame and the sliding window part.
The tubes do not extend past the plane of the
window intself.

With the vent open mine stands at 32inches tall. Unsure about
the removability of the casters, as mine is somewhat
permanently positioned/placed.

In heat pump mode, the upper coils get hot to keep the heat
in the room (and the lower section gets cold to send cold
air out the window). While in AC mode or "Dehumidify", the
upper coils get cold to cool the room air (with the cold
attracting the moisture to produce condensation and thus
"dehumidify") and the lower coils are hot. You
can't "Dehumidify" in heat mode since you're indirectly
saying "I want the upper coils hot (for heating) and cold (for
dehumidifying) at the same time" which is impossible. So if
you really must do both, you'll need to switch modes every
few hours or such.
Note, to do effective "Dehumidifying" you MUST drain water
from the top port constantly. If you don't drain it from the
top port, then water drains onto the hot coils below,
evaporates, and goes right back into the room (since you
don't vent hot air in "Dehumidify' mode).
So manually draining from the top port is the only way to
divert the water somewhere else besides the air.

The two window tubes are approximately 4 inches and 5
inches in diameter. They both terminate in a thin plastic
plate which is about six inches high and expands in length
from between 15 to 24 inches (or so). The plate is designed
to fit in the slot space below the opened window to seal
between the window frame and the sliding window part.
The tubes do not extend past the plane of the window
intself.