Here’s one observation I’ve made, whenever I have a load of laundry drying in my HOH, the air coming out of the vent outside feels quite damp. Awhile back, I went outside to where the vent is, felt the exhaust air coming out, was quite damp. Reason for that is items are constantly in the air stream and since it’s surrounded by a full 360 degree circle of heat, evaporated moisture fairly quickly despite a 4500 to 4800 watt heating element.
I haven’t actually timed how long mine takes to dry on the auto dry with the dryness set all the way up, but probably in the neighborhood of 45 to 50 minutes, 50 to 60 minutes with a fairly large load of towels. Mind you, this is with a thermostatic auto dry with low heat, not a moisture sensor.
Another possible reason for the reasonable and quick drying times for certain loads is it’s able to hold a more steady temperature with a lower temperature vs the 140F to 150F which is close to the high limit thermostat rating.
Someone really should put a 120F cycling thermostat in an electronically controlled HOH with the adjustable thermostat set to 95F, willing to bet it’d make it a bit quicker.