Heating vs Industrial Air Pollution Regulations: Burner Emission Limits

Which regulation applies to which installation?

This distinction matters because the two regulations carry different obligations. A large hotel or shopping centre's heating plant room can exceed the 1000 kW threshold — at which point the site falls under a different regulatory framework than a residential plant room.

Obligations under the heating regulation

As covered in our maintenance frequency guide, Article 17 of this regulation requires annual maintenance and flue gas measurement for installations above 30 kW on gas or 15 kW on liquid/solid fuel — which covers the large majority of residential and shared-block plant rooms.

Obligations under the industrial regulation

Obligations for businesses falling under the Regulation on Control of Industrial Air Pollution are broader:

• Environmental permit: an environmental permit is required to establish and operate a facility falling under this regulation.
• Emission measurement and the reference oxygen basis: emission limit values are calculated assuming a different reference oxygen level depending on fuel type — 3% for liquid and gaseous fuels, 6% for solid fuels, and 15% for gas turbines. This allows measurement results from different installations to be compared fairly.
• Operator responsibility: flue gas emissions must be measured by the operator in accordance with the procedures set out in the regulation.

Important note: the exact mg/Nm³ emission limit values vary by installation capacity, fuel type and the relevant annex table in the regulation. Because these are installation-specific, an environmental engineer or consultant should be involved at the design stage to confirm exact figures — this article covers the general framework, not site-specific limit values.

How the burner's emission class relates to the regulatory limit

The Class 1–3 NOx classification covered in our EN 676 and EN 267 guide reflects the emission performance declared by the burner manufacturer. But the limit a site must actually meet under the regulation is determined separately, based on the site's capacity and the applicable legislation, independent of the burner's class — choosing a low-NOx burner is a step in the right direction, but does not by itself guarantee compliance; this must be confirmed by site-level measurement.

Who is responsible for measurement and reporting?

Under both regulations, ultimate responsibility rests with the site owner or operator. Arranging the measurement, keeping records and presenting them at inspection is the operator's duty; the technical service provider carries out and reports the measurement, but the legal obligation sits with the operator.