Well, wrong. You have LG washer/dryer combos over there either. And the heaters in there are approx. the same size as the BSH ones have (1400W I think). And 5min at 80° are easy going: The washer/dryer starts heating and THEN, ones it reached 80° after about 10-30 min, it starts the Thermospin. Ones the clothes are heated up, the heater has no problem to keep the temp at 80°. The water expends at this temperature enough so it is easyer to get it spun out off the fiber.
The idea was first used by Miele, and till today, the Miele washer/dryer does this, but only at normal temperature, ones you selected low temp, it won't.
But 80° are way to hot for drying in my opinion. I would rather get a AEG with heatpump tech that will be launched soon here in the EU.