Boiler servicing in Brussels: is it the tenant's or the landlord's responsibility?

A question that comes up at every inventory check

It's one of the most misunderstood topics in Brussels rental life. When signing a lease, moving into a property, or worse, during an outgoing inventory check that turns into a disagreement, the question of boiler servicing resurfaces. The tenant thinks it's the landlord's job since he owns the appliance. The landlord considers servicing to be a usage-related charge, just like servicing the extractor hood or the fridge. The result: some Brussels boilers haven't seen a technician in years, which raises a genuine safety issue, not to mention the financial dispute that can arise at the end of a lease.

At DPS Chauffagiste, we visit tenants and landlords across Brussels every week, and this confusion comes up very regularly. Here's what you need to know to clarify everyone's responsibilities.

What the standard lease provides for in the Brussels-Capital Region

In the Brussels-Capital Region, the law on residential leases sets out how charges are split between landlord and tenant, and this split is included in most standard lease contracts used by estate agencies and private individuals. The general principle is simple: routine servicing, which results from normal use of the property, is the tenant's responsibility. Major repairs and the replacement of equipment, on the other hand, remain the landlord's responsibility, unless the tenant is responsible for damage caused by negligence.

For the boiler, this works out in practice as follows: the compulsory annual service (cleaning, combustion check, safety inspection) is generally considered routine tenant-side servicing, and therefore falls to the tenant. However, if the boiler breaks down due to age, if a major component fails, or if the appliance needs replacing, this falls under the landlord's responsibility, as a major repair or structural upkeep.

This split is not, however, set in stone for every individual situation. Some leases include specific clauses, particularly when the property is furnished, rented as a shared flat, or managed by an agency that centralises servicing contracts for an entire building. It's therefore always worth carefully re-reading your lease before jumping to conclusions.

Routine servicing vs major repairs: the distinction that changes everything

The nuance between "routine servicing" and "major repair" lies at the heart of most disagreements. Routine servicing is a preventive, regular intervention: cleaning the burner, checking the settings, verifying the seals, measuring combustion. This is what a heating technician does during the annual visit.

A major repair is something else entirely: replacing a cracked heat exchanger, a faulty circuit board, a perforated heating body, or more broadly, the complete replacement of a boiler at the end of its life. These interventions don't stem from normal wear and tear linked to the tenant's daily use, but from the ageing of the installation itself, for which the landlord remains responsible as the property owner.

In practice, the difficulty is that the line between the two isn't always clear-cut. A boiler poorly serviced for years can develop faults that, without being a "major repair" in the strict sense, stem directly from a lack of routine servicing. This is precisely why written proof of each service becomes so valuable, as we explain further below.

Who pays for what in practice

The compulsory annual boiler service

In practice, in the vast majority of Brussels leases, it's the tenant who arranges and pays for the annual service of the individual boiler heating their home. This includes the cost of the approved technician's visit, the cleaning, the safety inspection and the issuing of the certificate. It follows much the same logic as servicing an extractor hood or replacing a tap washer: a routine act linked to occupying the property.

Some landlords or building managers, particularly in blocks of flats with individual boilers, prefer to centralise this servicing through an annual contract with a single heating engineer for the whole building, then pass the cost on through the service charges. This approach has the advantage of ensuring no one forgets the service, but it must be clearly stated in the lease or the co-ownership rules.

Repairs and replacement

As soon as it comes to repairing a fault that isn't due to misuse by the tenant, or replacing an ageing boiler, it's the landlord who must step in and pay. A tenant cannot be required to fund the replacement of a heating appliance that belongs to the landlord and has simply reached the end of its life. Conversely, if a fault results from proven negligence on the tenant's part, for example a complete lack of servicing for several years despite their contractual obligation, the landlord can rightfully hold them accountable.

This is where the question of certificates becomes decisive: without proof of regular servicing, it becomes very difficult for either party to demonstrate good faith in the event of a dispute.

The legal obligation to service in Brussels

Beyond the contractual question, there is a legal safety obligation, independent of who has to pay. In the Brussels Region, gas and heating oil boilers must undergo periodic servicing carried out by an approved technician, with a combustion inspection certificate issued at the end. This obligation is primarily aimed at occupants' safety: a poorly serviced boiler can pose risks of poor combustion, reduced efficiency and, in the most serious cases, the release of carbon monoxide, a colourless and odourless gas that can be fatal if it builds up in a poorly ventilated space.

This legal obligation therefore applies regardless of the occupancy status of the property, whether tenant or owner-occupier. What the lease determines is who arranges and funds this servicing within the context of a rental agreement, not whether the servicing must be carried out at all. For the exact procedures and required frequencies depending on the type of installation, Brussels Environment remains the reference authority, regularly publishing up-to-date information on the heating regulations in force in the Region.

Why keeping the certificates benefits both parties

Whether you're a tenant or a landlord, carefully keeping every boiler service certificate is one of the most useful habits to adopt. Here's why.

For the tenant, the certificate proves they have fulfilled their contractual obligation, which protects their rental deposit at the end of the lease. In the event of a dispute over the outgoing inventory check, a complete file with certificates from recent years can demonstrate that the boiler has been properly maintained, and that any fault cannot be attributed to them.

For the landlord, these same certificates make it possible to track the actual condition of the installation over time, to plan a replacement before a breakdown occurs, and to have a consistent technical history available in the event of a resale or a change of tenant. It's also a strong argument should a dispute end up before the justice of the peace, the court with jurisdiction over lease disputes in Brussels.

In both cases, the certificate provides neutral, dated proof, far more solid than a mere recollection or a verbal promise exchanged when the keys were handed over.

What to do in the event of disagreement or dispute

If a disagreement arises over who should pay for an intervention, the first step is always to re-read the lease contract in detail, particularly the clauses relating to charges and the servicing of heating equipment. Many standard Brussels leases include a precise list of tenant servicing obligations, often as an appendix.

If the lease remains vague or silent on this point, it's better to clarify the situation in writing with the other party before an incident occurs, rather than waiting for the outgoing inventory check. If disagreement persists, the Brussels Region's Housing Information Service or a joint rental commission can provide initial clarification, before considering, as a last resort, proceedings before the justice of the peace.

What to do in practice, today

If you're a tenant and don't know whether your boiler has already been serviced this year, the simplest approach is to check your lease and ask your landlord or agency for the history of certificates. If no service has been carried out for over a year, it's time to arrange a visit, both to meet your obligations and for your own safety.

If you're a landlord, a written reminder to your tenant when the lease is renewed, stating the date of the last service, avoids a good deal of misunderstanding. Some landlords also choose to arrange an annual servicing contract themselves and pass the cost on through the charges, which ensures no service is ever missed, regardless of tenant turnover.

In summary

In Brussels, the general rule is that routine, annual boiler servicing is the tenant's responsibility, while major repairs and the replacement of the appliance remain the landlord's responsibility. This split should, however, always be checked against the specific lease contract, which may provide for different arrangements. In all cases, the annual service remains a legal safety obligation, independent of billing matters, and keeping each certificate protects both tenant and landlord in the event of disagreement or inspection.