District heating in a condominium: costs and split

District heating is a system that brings heat to the building from an external production plant through a network of city pipes. The condominium has no boiler of its own, but a heat exchange substation that draws heat from the network and distributes it to the units. Even with district heating, heat metering is mandatory under Legislative Decree 102/2014, and costs must be split by distinguishing voluntary consumption from the fixed share, exactly as for central boiler systems.

How district heating works

Heat is produced in an external plant, often powered by cogeneration, recovered industrial heat or renewable sources, and travels as hot water or steam through a network of buried pipes. At the building entrance, the exchange substation transfers the network's heat to the condominium's internal circuit without mixing the two fluids. From there distribution to the radiators works like in a normal central system, with the difference that the condominium does not have to run its own combustion plant.

The heat exchange substation

The substation is the key element of a condominium system connected to district heating. It replaces the boiler and includes the heat exchanger, the regulation systems and the meter that measures the total energy drawn from the network, on which the operator's billing is based. The substation is a common asset of the condominium and its maintenance falls among the shared costs, normally split by heating thousandths, with the ordinary and extraordinary distinction applying as for any system.

The metering obligation still applies

A common mistake is to think that with district heating internal metering is not needed. That is not the case: the rules require heat metering also in buildings connected to district heating networks, where technically feasible and economically efficient. The operator's meter in fact measures only the total heat entering the building, not how much each individual unit consumes. To split costs fairly you need internal devices, allocators on the radiators or individual meters, that measure each apartment's consumption.

How costs are split

The split follows the same logic as central boiler systems. The main items are:

• The energy cost billed by the network operator, measured by the general meter
• The voluntary consumption share, which must be at least 50%, split by internal readings
• The involuntary fixed share, split by heating thousandths or the criterion approved
• Maintenance costs of the substation and internal systems
• Any fees and contractual charges towards the operator

Benefits and aspects to weigh

District heating frees the condominium from running a combustion plant, removing the risks and obligations tied to the boiler and cutting local emissions. However, the condominium depends on a single network operator, with tariffs and contractual terms set by the supplier. The manager must carefully check the supply contract, the tariff clauses and responsibilities for maintaining the substation, to avoid surprises and ensure transparency for owners.

The role of the condominium manager

The manager handles the relationship with the network operator, checks the invoices against the general meter, collects the internal readings and produces the annual split by distinguishing consumption from the fixed share. The manager must also schedule maintenance of the substation and keep the contractual and technical documentation. As with any thermal system, orderly management reduces the risk of errors and litigation.

AmministraPro lets you manage the district heating split by importing internal readings, distinguishing consumption from the fixed share and archiving the contract with the network operator. Discover the accounting and document management tools on /funzioni and choose the plan that suits you best on /prezzi.