How is a PTC heater different from a fan heater?

A PTC ceramic element heats up fast and self-regulates as it warms, while a plain wire fan heater keeps drawing full power. Both use a fan to push air out, so both make some noise.

Will it heat a whole room or just the area in front of it?

It is a portable single-room heater. Wide-angle circulation spreads warmth further than a narrow fan, but a large or draughty room will still feel cool at the edges.

Is it safe to leave running unattended?

The brand stresses a flameless design, but no portable heater should be left running unattended or near curtains and bedding. Check the unit's own safety instructions before relying on it overnight.

Does it dry out the air?

Any heater that raises room temperature lowers relative humidity somewhat. This one is marketed as gentler than old fan heaters, but it does not humidify.

How noisy is it in a bedroom?

The brand calls it whisper-quiet, but it still moves air with a fan. Expect a low hum rather than silence, and check owner reports before using it next to a bed.