If you look around a typical Hong Kong office during the winter season you'll often find people in down-feather jackets sitting around old-style (and energy hungry) blow heaters and electrical oil radiators (2000W units are very popular in HK).
This winter however, our office was nice and cosy and T-shirts were the norm. With 70kW heat dissipated next door, and a few tanks strategically placed in the corner of the office, we've had free heating all winter long. It's a very energy efficient way to heat the room.
The dissipated heat from immersion cooling systems is very easy to capture. It is a no-brainer to connect to an existing central heating system or make it part of the design process for a new building design or renovation.
There are no hot water radiators in Hong Kong (and no central heating system as far as I am aware), but if we have the chance we'll definitely get some radiators for the upcoming cold seasons. We could probably heat the whole building with our tiny cluster!