Given that it takes up to 12 hours for a 220 volt tub to heat the water, and twice as long for a 110 tub, I don’t think anybody has drained the tub on turn day in the houses I’ve rented. The water is already at 104 degrees when I arrive. A decent 6 person tub holds around 450 gallons and would take over a hour to fill (Depending on how close you are to a water tower) so I don’t think the tub maintenance company is hanging around that long.
The service that checks water and adjusts pool and hot tub chemicals usually wouldn't be the service that would be draining, cleaning, and refilling. They're two different tasks.
Although, hot tubs made and sold for rentals don't take anywhere near 12 hours come up to temp, though lots of residential models definitely take longer.
Really? Explain the technology that would make a cheap rental unit heat water faster than a more expensive top of the line unit. Most of the tubs at rentals I’ve occupied are knock off models sold at big box stores or Ace. They definitely take more than 12 hours to heat up to operating temperature.
Even the newest state of the art Balboa Spa Pack models take more than12 hours to heat up.
It would be nice if they drained the hot tub after each guest leaves, but I don’t see that happening. Maybe somebody here that rents their house, and has a hot tub, could chime in as to whether or not their tubs get drained weekly?