For a single low-criticality site, such as one residential plant room, one-off servicing is usually sufficient. For hotels, hospitals, manufacturing plants and multi-block estates — sites that must run continuously or that operate a large number of burners — an annual maintenance contract is the safer model, both for cost predictability and for fault response priority. The right choice depends on site criticality and burner count; there is no single answer that fits every site.
How the two models work
One-off service: service is called out as needed — at a fault, or when the annual maintenance date comes round. Each visit is priced separately, and scheduling depends entirely on the site owner keeping track.
Annual maintenance contract: a set number of scheduled visits, measurements and usually priority fault response are defined up front for a single annual fee. Interval tracking is handled by the service provider — the site owner does not need to remember.
Cost structure comparison
| One-off service | Annual maintenance contract | |
|---|---|---|
| Payment timing | Separate at each visit | Fixed annual fee (upfront or instalments) |
| Budget predictability | Low — unexpected cost at fault time | High — annual cost known in advance |
| Cost of faults | Full rate, may include out-of-hours surcharge | Usually included in contract, or discounted |
| Hidden cost of delayed maintenance | High — efficiency loss accumulates over time | Low — interval tracked automatically |
| Spare parts | Usually invoiced separately | Varies by contract — some parts may be included |
The per-visit price under a one-off model can look lower on paper. But the accumulated efficiency loss and increased fault frequency that come from missed servicing can push the total cost above the contracted model over time.
The compliance tracking difference
As covered in our maintenance frequency guide, the Turkish Regulation on Control of Air Pollution from Heating requires annual maintenance and flue gas measurement for installations above the stated heat output thresholds. This obligation sits with the site owner regardless of service model. In practice, though:
- Under a one-off model, tracking this falls entirely on site management — particularly on multi-block estates or businesses with several buildings, where the interval is easily missed.
- Under a maintenance contract, the interval is tracked by the service provider, visits are typically flagged in advance, and measurement records are filed consistently.
Manually tracking the service date of dozens of burners across a large residential estate is one of the most concrete practical benefits of a contracted model.
Fault priority and response time
Sites on an annual maintenance contract are typically placed ahead of the queue for emergency call-outs. The practical reason is straightforward: the service provider already holds the site's maintenance history and burner details, which shortens diagnosis time. Under a one-off model, every call-out is effectively treated as a "starting from zero" case with no known history.
On hotels and hospitals that must run continuously, this difference directly determines how many hours a fault takes to resolve.
Measurement history and trend tracking
This is one of the least appreciated but most valuable benefits of a maintenance contract: the O₂, CO₂, CO and flue gas temperature readings logged at each visit become comparable over time. A sudden rise in CO or a gradual efficiency decline against the previous reading is caught before it becomes a fault. Under one-off servicing, each measurement is an isolated data point — there is nothing to compare it against.
Which model suits which site type?
| Site type | Recommended model | Rationale |
|---|---|---|
| Single residential unit / small business | One-off service | Low criticality, single burner |
| Multi-block estate (shared plant room) | Maintenance contract | Many burners, high tracking burden |
| Hotel | Maintenance contract | 24/7 operation, priority response needed |
| Hospital | Maintenance contract | No tolerance for downtime |
| Manufacturing plant | Maintenance contract | High cost of downtime, process continuity |
| Single commercial building, low-intensity use | Either can work | Depends on criticality and budget preference |
What to check in a maintenance contract
Before signing, get clarity on:
- Scope: does the contract cover scheduled maintenance only, or fault response as well?
- Visit frequency: how many visits a year are included, and does that match the site type?
- Measurement and reporting: are flue gas measurement results provided in writing at every visit?
- Emergency response time: is a response time for fault call-outs actually committed to?
- Spare parts: are consumables (electrodes, filters, etc.) included, or invoiced separately?
- Out-of-hours and holiday cover: critical for any site that must run 24/7.
- Term and renewal terms: what is the contract length, and are there automatic renewal conditions?
Where these points are left vague, what is labelled a "maintenance contract" can turn out to be no different from one-off servicing in practice.
Frequently Asked Questions
Why might a maintenance contract be better value than one-off servicing?
A maintenance contract automates interval tracking, typically provides priority fault response, and enables measurement history to be compared over time. Together, these reduce fault frequency and prevent the hidden cost of delayed maintenance.
Does a single residential property need a maintenance contract?
Usually not. For a low-criticality, single-burner site, an annual one-off service is often enough to meet the statutory minimum obligation.
Does a maintenance contract automatically satisfy the legal maintenance requirement?
A contract makes tracking the interval easier, but the obligation always sits with the site owner. It is worth confirming that the contract's scope actually meets the annual maintenance and measurement requirement set out in the regulation.
Are spare parts included in a maintenance contract?
This varies by contract. Whether frequently replaced consumables such as electrodes and filters are included should be clarified before signing. ---
About Beray Enerji
Beray Enerji is an Istanbul-based burner service company operating across Türkiye, with primary coverage in the Marmara, Thrace and Aegean regions. We offer annual maintenance contracts, one-off servicing, fault response and flue gas analysis for gas, oil and dual-fuel burners of all makes and models, backed by a technical team with 30 years of field experience. To discuss the right model for your site, contact us on +90 (000) 000 00 00 or at info@berayenerji.com.
Related services: Burner maintenance · Burner repair service · Contact
References
- Regulation on Control of Air Pollution from Heating (Türkiye), Article 17
- EN 676 — Automatic forced draught burners for gaseous fuels