Possibility of reducing the costs of hot water distribution while maintaining the user's comfort

Residents of multi-storey buildings expect that the systems operating within the facility will function reliably and in a manner that ensures comfort. One of the systems that improves comfort is water circulation. Unfortunately, its operation is associated with significant costs, especially in the form of heat losses. Various attempts are being made to improve the energy efficiency of this system while maintaining high comfort for users. It seems that limiting the activities to the use of dedicated regulatory fittings is not enough. The use of other solutions, e.g. additional thermal insulation, may be impossible for organizational reasons. A separate issue is the financial matters and cost-effectiveness of such activities.