Building automation above 290 kW – BFS 2026:9 and indoor environment in 2026
Does your non-residential building need automation above 290 kW? Four functions, new indoor-environment monitoring and inspection exemptions in Sweden.
Does your non-residential building have a heating or air-conditioning system with a nominal output above 290 kW? If so, building automation and control may be required to meet four functional requirements. From 1 October 2026, monitoring indoor environmental quality is also one of those requirements. Review an older installation before assuming that a previously applicable exemption from inspections remains valid.
Which existing buildings fall under the 290 kW rule?
Chapter 4, Section 2 of Swedish regulation BFS 2026:9 concerns existing buildings where most of the temperature-controlled floor area consists of non-residential premises and the heating or air-conditioning system, where relevant combined with ventilation, has a nominal output above 290 kW for those premises. Verify the actual system boundary and rated output using technical documentation. Exactly 290 kW is not above 290 kW. Do not combine independent heating and cooling figures mechanically.
The rule does not automatically cover every residential building or small shop. In mixed-use buildings, establish which share of the temperature-controlled floor area is non-residential. Chapter 4, Section 1 also permits case-specific adaptations in circumstances such as technical constraints, disproportionate costs or protection of cultural heritage. Such grounds require an individual assessment.
What changed on 1 October 2026?
Building automation obligations for the relevant larger non-residential buildings existed from 1 January 2025. The entire 290 kW obligation did not begin in October 2026. The key addition in BFS 2026:9 from 1 October 2026 is the function to monitor indoor environmental quality. The Swedish National Board of Housing, Building and Planning (Boverket) notes that this may affect inspection exemptions previously available to buildings with older automation.
Decision matrix: four functions and practical evidence
| Function under Chapter 4, Section 2 | What must the system do? | Practical evidence to keep |
|---|---|---|
| 1. Energy monitoring | Continuously monitor, record and analyse energy use and allow adjustments. | Timestamped trend logs, screenshots, tested control action and named reviewer. |
| 2. Efficiency losses | Set efficiency benchmarks, identify losses and inform about potential improvements. | Benchmark comparisons, sample alerts and information delivered to the operator. |
| 3. Interoperability | Enable communication between relevant parts of technical building systems. | System diagram, documented interfaces and recorded communication test. |
| 4. Indoor environment | Monitor indoor environmental quality. | Sensor/zone inventory, readings, alarm points, function test and fault handling. |
The examples of evidence are practical recommendations, not a statutory checklist of exact screenshots. A single reading or purchase invoice does not prove that all four functions work.
When must an inspection exemption be reassessed?
Under the Swedish energy-declaration rules BFS 2007:4, Section 3 b, a relevant exemption from inspections of heating, ventilation and air-conditioning systems depends on automation meeting items 1–4 of BFS 2026:9, Chapter 4, Section 2. Since indoor-environment monitoring was added on 1 October 2026, a system that previously qualified may need reassessment. Simply owning a BACS installation does not grant an automatic exemption.
Boverket also explains that partial control of a relevant system may not exempt that system from inspection. Multiple distinct systems must be assessed separately. A qualified energy expert and the responsible actor should evaluate the actual conditions; an Excel status field cannot grant a legal exemption.
Seven steps for a traceable functional test
- Define the building, building section and proportion of temperature-controlled floor area used as premises.
- Verify the nominal output and correct system boundary using data sheets and as-built documentation; distinguish heating, cooling and relevant ventilation combinations.
- Inventory automation vendors, versions, connected systems, sensors and communication interfaces.
- Test the four functions and retain dated evidence for energy monitoring, benchmarks, interoperability and indoor environmental quality.
- Record missing data, defective sensors, broken interfaces, owners, corrective actions and retest dates.
- Assess inspection exemptions independently under BFS 2007:4, including limitations and expert evaluations.
- Record the review owner, date, version, decision and the next check; track future legally effective changes.
Three situations with different outcomes
Office building with 340 kW and older BACS
An office building has a documented 340 kW heating system and energy logging, but indoor environmental quality monitoring has not been demonstrated. Chapter 4, Section 2 may apply. The operator should verify the new function and must not assume that an older inspection exemption still applies.
Non-residential building rated exactly 290 kW
A technician finds a 290 kW nominal rating for the relevant system. The law says above 290 kW, not at least 290 kW. Confirm that the rating covers the correct system boundary and is not just a partial label.
Mixed residential and commercial building
A property includes flats and shops. First establish whether premises make up most temperature-controlled floor area and which systems serve them. A large total installed capacity alone does not prove that this specific rule applies.
What changes after 2026?
The recast Energy Performance of Buildings Directive (EU) 2024/1275 also contains later deadlines for automation and automatic lighting control. Boverket has adopted amendments to BFS 2026:9 that take effect on different dates in 2027, 2028, 2029, 2030 and 2033. Do not treat a future requirement as already applicable in November 2026; check the operative Swedish wording for the relevant date.
Frequently asked questions
Does the rule apply at exactly 290 kW?
No. Chapter 4, Section 2 refers to nominal output above 290 kW. First verify which system and rated output are legally relevant.
Is indoor-environment monitoring required in 2026?
Yes, for buildings within the scope of BFS 2026:9, Chapter 4, Section 2, indoor environmental quality monitoring is a functional requirement from 1 October 2026. The regulation does not prescribe one brand or universal sensor set.
Does installing BACS automatically waive inspections?
No. The relevant system must actually meet the applicable functional requirements, including indoor-environment monitoring. Evaluate each system and the inspection rules separately.
Does a checklist count as official certification?
No. A functional test records real evidence but does not create regulatory approval or an automatic inspection exemption. Real technical assessment may be necessary.
Related document templates
For practical documentation, a topic-specific template pack is available: Building Automation 2026 – BFS 2026:9, 290 kW and Indoor Environment | Word/PDF/Excel The templates are optional working aids; this guide is useful independently of any purchase.
Official sources and review
- Boverket – BFS 2026:9, Chapter 4 Sections 1–2
- Boverket – retroactive requirements
- Boverket – inspections and exemptions
- Boverket – future regulatory amendments
- Directive (EU) 2024/1275 Article 13
Editorial fact check against Swedish official sources and EU law: 11 November 2026. General information on Swedish law, not a building-specific technical assessment, energy expert opinion or government approval.
