Comparisons
Central or independent heating in a condominium
Choosing between central and independent heating shapes bills, maintenance duties and disputes among owners in a condominium. The topic resurfaces whenever an owner asks to opt out of the shared system, or when the assembly considers an energy retrofit. There is no universally better option: it depends on the building's age, the number of units, actual consumption patterns and the administrator's ability to manage heat accounting and cost allocation without mistakes. This guide compares the two situations on legal, technical and management grounds, focusing on article 1118 of the Italian Civil Code on opting out and on the rules for allocating shared costs, an area where software such as AmministraPro considerably simplifies day to day work.
Compared
| Criterion | Independent | Central |
|---|---|---|
| Contract management | Each unit has its own supply contract and independently controls when heating is on or off | A single contract managed by the administrator on behalf of all owners |
| Cost allocation | No allocation on ordinary consumption, each owner pays their own bill | Allocation under UNI 10200 between a voluntary share and an involuntary share |
| Individual opt out | Not applicable, the unit is already independent | Possible under article 1118 if it does not cause imbalances, but extraordinary maintenance costs remain owed |
| Maintenance | Borne by each owner for their own boiler, except for any shared flue | Coordinated by the administrator for the whole system, with a plant logbook and mandatory checks |
| Administrative complexity | Limited to remaining shared aspects, such as a shared flue | Higher: meter readings, allocation coefficients, managing opt outs |
What actually changes between the two systems
Central heating relies on a single thermal plant serving all units, with a shared boiler, a common distribution network and management entrusted to the administrator on behalf of every owner. Independent heating, by contrast, gives each unit its own boiler and its own supply contract, with full freedom over when to turn heating on or off and how to regulate temperature.
The difference is not only about individual comfort but also about management responsibility: with central heating the administrator coordinates maintenance, supply and cost allocation for the whole building, while with independent heating each owner manages their own system, subject only to periodic maintenance obligations and flue gas checks required by fire safety and environmental regulations.
Opting out of the central system: article 1118
Article 1118, second paragraph, of the Italian Civil Code allows an owner to give up use of the central heating or air conditioning system, provided the opt out does not cause significant operating imbalances or extra costs for the other owners. An owner who opts out still has to contribute to the costs of extraordinary maintenance of the system and to its preservation and regulatory compliance.
In practice, opting out is not an automatic right: it requires a prior technical check, usually carried out by a heating engineer, confirming there is no imbalance on the shared system. The administrator must keep this documentation on file and update the cost allocation plans, distinguishing the amounts owed by the opted out unit from those of owners still using the central system.
- Opting out must be formally communicated to the administrator, simply stopping use of the radiators is not enough
- An owner who opts out still pays for extraordinary maintenance and preservation of the shared system
- If the opt out causes thermal imbalances or raises costs for others, the assembly can object
Heat accounting and cost allocation
For central systems the reference technical standard is UNI 10200, which governs how heating costs are split between a voluntary consumption share, measured through heat cost allocators or meters installed on each radiator, and an involuntary consumption share linked to the building's characteristics and to heat losses in the distribution network. Individual accounting makes bills fairer because it rewards lower consumption, but it requires more detailed bookkeeping than a simple allocation based on ownership shares.
With independent heating the question is simpler: each owner receives their own bill and there is no allocation among units for ordinary consumption. What still needs to be allocated are the related shared costs, such as a common flue if present, regulatory compliance charges and, in some cases, maintenance of shared valves or safety devices.
Practical management for the administrator
With central heating the administrator must track meter readings, apply UNI 10200 coefficients, keep the plant logbook and schedule mandatory maintenance, as well as coordinate any opt outs under article 1118 by updating the allocation plans. With independent heating the shared administrative burden shrinks to the remaining common aspects, but there is a greater need to keep track of individual authorizations and compliance, which becomes useful in the event of a sale or an inspection.
Management software that keeps allocation plans separate, records the extraordinary maintenance shares owed by opted out units and archives technical documentation reduces the risk of disputes at assembly meetings. AmministraPro lets administrators configure dedicated heating allocation tables and keep a history of resolutions, features useful both in fully central condominiums and in mixed ones where opted out and still connected units coexist.
Frequently asked questions
Can an owner opt out of the central heating system at any time?
No, opting out is conditional on the fact that it does not cause significant operating imbalances in the shared system or extra costs for other owners, as required by article 1118 of the Italian Civil Code. It is good practice to have a technician verify this condition before formally notifying the administrator, who must then update the cost allocation plans accordingly.
Does an owner who opts out stop paying all heating costs?
No. Even after opting out, the owner still has to contribute to the costs of extraordinary maintenance of the central system and to its preservation and regulatory compliance, because the system remains shared property that indirectly benefits everyone, even those who no longer use it to heat their own unit.
What does UNI 10200 say about allocating central heating costs?
UNI 10200 is the Italian technical standard governing how costs are allocated in central systems equipped with heat accounting, separating a share linked to voluntary consumption, measured through heat cost allocators or meters, from an involuntary share connected to the building's characteristics and to thermal losses in the distribution network.
Does converting from central to independent heating require unanimous approval from the assembly?
Converting the shared system into independent systems for every unit is a decision affecting the whole building and involves significant works on common parts: it is worth assessing case by case with the administrator which quorum applies based on the type of intervention, keeping this collective decision distinct from an individual opt out under article 1118, which instead concerns a single owner.
How can an administrator keep an orderly condominium with mixed heating running smoothly?
It helps to keep separate allocation plans for opted out and connected units, document the technical verification behind each opt out and archive assembly resolutions. Software such as AmministraPro allows administrators to configure dedicated heating allocation tables and keep technical documentation and decision history in a single digital archive, reducing the risk of errors and disputes.
Try AmministraPro
Accounting, thousandths-based cost splitting, meetings, communications and artificial intelligence in a single Italian software, compliant with UNI 10801 and GDPR.