Important update on ErP Directive

ErP Directive For Warm Air Heaters 2018


ErP Directive For Warm Air Heaters 2018  and beyond. 

1: What is the ErP Directive for Warm Air Heaters 2018?

The Energy Related Product Directive 2009/125/EC (ErP for short) is a European Council Regulation which implements a series of measures for reducing greenhouse gas emissions. Warm air heaters are covered by the scope of Lot 21 of the Directive.

2: Can I download a copy of the ErP Directive for Warm Air Heaters 2018?

Yes to download the ErP Directive for Warm Air Heaters 2018 click on the Powrmatic web-site

3: Does it affect the heaters I purchase, install or specify?

Yes, where those heaters are specifically applied to provide thermal comfort for human beings.

4: Are there applications where the ErP Directive for Warm Air Heaters 2018 does not apply?

Yes, if the heaters are used for the applications below, technically the ErP regulations do not apply. However installers, specifiers and end users should consider the benefits of applying compliant heaters as they may well offer benefits.

The applications where ErP Directive for Warm Air Heaters 2018 doesn’t apply are:

  • Door curtains
  • Agricultural heating (ie poultry houses)
  • Horticultural heating (ie glasshouses)
  • Process heaters/dryers
  • Frost protection of perishable products

5: Does the regulation apply to air handling units as well as air heaters?

Yes, this is specifically covered within the Directive.

6: Does the regulation cover oil, gas, LPG and bio fuels?


7: Are gas fired radiant heaters covered?

Yes, however they are covered under Lot 20 of the Directive.

8: What does the Erp Directive For Warm Air Heaters require?

The implementation and requirements of the Directive in respect of warm air heaters become effective as from:-

1st January 2018;

  • From this date all warm air heaters which are used to provide thermal comfort for human beings must achieve a seasonal efficiency of more than 72%.

And from the 26th September 2018;

Additionally, NOx emissions must not exceed:-

  • For gas fired warm air heaters  100 mg/kWh (gross)
  • For oil fired warm air heaters 180 mg/kWh (gross)

There are further changes due from the 1st January 2021.

9: What do you mean by seasonal efficiency?

The seasonal efficiency calculation required under the Directive takes into account the thermal efficiency at both full and part load conditions as well as airflow, temperature rise across the heat exchanger and power consumption.

10: Why does the efficiency threshold seem lower than those currently achieved?

This is because the European Council have chosen to use gross calorific values  rather than the nett calorific values that are currently used to determine thermal  efficiency.

11: So are the heaters just as efficient as they used to be?

Yes, and in most cases more so.

12: How will the heaters change on the 1st January 2018?

In the short term the heater products that are familiar to you will remain largely  unchanged. The key differences are as follows:-

If heaters are to be used for providing comfort for human beings then from 1st January 2018 both suspended and cabinet heaters will be configured to operate with high/low output as standard.

If heaters are to be used in ‘non-comfort’ heating applications (see question 4) then it may be possible to specify product in on/off configuration where such formats are available.

13: Will the above heaters still be available in modulating configuration as well as high low?

Yes, and in modulating format all will be compliant.

14: Will all warm air products change?

No, the following products are already compliant and as such won’t change:-

  • Condensing gas heaters, check with manufactuerer
  • Air rotation heaters (Already high/low as standard, modulating as an option)

15: Are there any on/off heaters that are compliant?

Yes, condensing gas unit heater is compliant in on/off, high/low and modulating configuration.

16: What happens if I order heaters in December 2017 for delivery in January 2018 or after?

Current on/off heaters ordered immediately prior to the changeover date (1st January 2018) will be considered to be in the supply chain and can be delivered in this format.

17: There are further changes in September 2018, how will these affect the heaters?

On September 26th lower NOx levels will apply to heaters which are to be used to provide comfort heating. All heaters will be compliant and, essentially, the heaters will remain familiar to you.