Frequently Asked Questions

ErP (Energy related Products) is part of the Ecodesign regulation (EU) 2015/1188 which, along with the implementing Directive 2009/125/EC is an EU policy aimed at improving the energy efficiency and other environmental performance criteria for energy-related products (ErP), such as Radiant & warm air heaters.

For ErP, products have been divided into product groups or ‘Lots,’ with warm air heaters using gaseous or liquid fuels contained within Lot 21 & radiant heaters within Lot 20.

Lot 6 covers ventilation units (appliances that have the ability to introduce fresh air for heating or ventilation purposes).

Each Lot provides the minimum energy efficiency and environmental values for each heating technology. Any product that does not comply with the requirements cannot be marketed and sold within the EU – including the UK.

Following the referendum in the UK to leave the EU, the requirements of Ecodesign will still have to be complied with as it could take up to two years to finalise the process. Even then, unless new UK legislation is introduced, ErP will continue to be one of many methods employed by the Government to reduce the environmental impact of heating technology.

  • Lot 20 (radiant) has a max NOx emission of 200mg/kWhinput plus a minimum seasonal efficiency of 74%. Seasonal efficiency is a combination of thermal efficiency, radiant efficiency & electrical power consumption.
  • Lot 21 (warm air) has a max NOx emission of 100mg/kWhinput plus a minimum seasonal efficiency of 72%. Seasonal efficiency is calculated from airflow temperature rise, thermal efficiency and electrical power consumption. Lot 21 also applies to AHU’s and includes the performance of any heating / chilling coils, where human comfort is the primary heating purpose.

Essentially, other than outdoor (heating an outdoor space) units, air curtains or ambient units, all products need to comply with either Lot 20 or Lot 21, plus the motor efficiency ErP regulation.

  • Lot 6 (Ventilation units) is divided into 2 categories (residential & non-residential). The non-residential category is split into two type of units:-
    Uni-directional ventilation unit (single fan)
    Bi-directional ventilation unit (two fans or more)

A ventilation unit is designated as any unit (heating or non-heating) that operates on (or has the capability to operate on) fresh air – or a percentage of fresh air. AHU’s that provide heat/cooling & operate on 100% return air are exempt from lot 6, but will fall into lot 21.

Both of the above unit categories must meet internal specific fan power (SFP) levels and be fitted with high efficiency fans that have the ability to be speed controlled. Bi-directional units MUST also be fitted with a high efficiency heat recovery system – HRS plate heat exchanger or thermal wheel.

The implementation of SFP will, in most cases lead to an increase in the physical size of warm air heaters or AHU’s

Each lot has a different date.

  • Lot 20 (radiant heaters) comes into force on 1st January 2018.
  • Lot 21 (warm air heaters). Minimum seasonal efficiency comes into force on the 1st January 2018, with the maximum NOx levels applicable September 2018.

The second tier for ErP will be 2021, whereupon seasonal efficiency will increase to 78% and maximum NOx emission for gaseous fuels will be <=70mg/kWhinput.

  • Lot 6 (Ventilation) came into force on 1st January 2016 with a number of enhancements coming into force in 2018 most notably an increase in heat recovery performance (an increase from 67% to 73%).

Crucially, the minimum criteria for Lots 20 & 21 are applicable for new installations and when replacing existing products. As a result, customers can be assured that the heating equipment they are purchasing is highly energy efficient and emissions of harmful environmental pollutants are constrained.

Unlike other products, warm air heaters and other commercial heating appliances are directly planned and purchased by HVAC professionals, the Regulation 2015/1186 excludes warm air heaters and other commercial heaters from mandatory energy labelling. However, product literature and free access websites of manufacturers must indicate the seasonal efficiency and NOx emissions for each product or system.

Air Curtains are not considered warm air heaters by the scope of this Directive.

It should not affect products, but may affect the product offering from manufacturers. What it will do is ensure that some of the older technologies are withdrawn or modified to ensure compliance.

On initial appearance the ErP seasonal efficiency looks to be a lot lower than the current building regulations seasonal efficiency calculation, however when these minimum thermal & radiant efficiencies are added into the ErP seasonal efficiency calculator, the approximate results are as follows:-

  • Gas fired warm air heaters (atmospheric) = 70% (2% below)
  • Radiant (unitary) heaters = 71% (3% below)

Therefore, a net increase of approx. 2% will be realised for warm air heaters and 3% for unitary radiant heaters manufactured 1st January 2018 onwards.

As mentioned before, ErP seasonal efficiency is calculated differently and produces a different result. A figure that is far lower than those previously used in the NCM tool, therefore please ensure that the relevant seasonal efficiency figure is entered when carrying out your calculations.

Remember, the seasonal efficiency shown by manufacturers on websites, technical manuals & sales brochures post 2018 will be ErP seasonal efficiency.

To summarise;

  • ErP Lot 20 (radiant heaters) comes into effect January 2018 meaning the seasonal efficiency must be greater than 74%
  • ErP Lot 21 (warm air heaters) seasonal efficiency comes into effect 1st January 2018 meaning the seasonal efficiency must be greater than 72%
  • Seasonal Efficiency will be calculated differently (to include electrical power consumption). The current minimum seasonal efficiency would be 70% for Warm Air and 71% for Radiant, if we applied this calculation to our existing Building Regulations requirements.
  • ErP Lot 21 (Warm air heaters) max NOx levels comes into effect September 2018.
  • ErP Lot 20 (radiant heaters) comes into effect
    1st January 2018
  • ErP Lot 21 (warm air heaters) seasonal efficiency comes into effect
    1st January 2018
  • ErP Lot 21 (Warm air heaters) max NOx levels comes into effect
    September 2018.

ErP Compliant Radiant Heaters

  • Vision ranges
    (Natural gas models only)
  • NRV & Sonning 2
    (NRV only available in Nat Gas)
  • BTH2R & BTLH2R
  • CERA
    (Natural gas models only)
  • WRH
  • RLGH

ErP Compliant Warm Air Heaters

  • RHeco
  • UDSA & B
  • OUH
  • Cabinet heaters

ErP Compliant Ventilation Units

  • RTU

Increased seasonal efficiency

The introduction of the ErP directive will ensure that the HVAC industry adheres to minimum seasonal efficiency standards benefiting both customers and the environment.

Reduced Energy Bills and reduced reliance of fossil fuels

We are able to offer unrivalled support to consultants, contractors and end users from concept and design stage right through to installation. Our experience and compliance offers you peace of mind and will also help you reduce your fuel costs, which in turn will lessen the reliance on fossil fuels, helping to preserve our planet for future generations.

In essence, you will receive an improved, higher quality and streamlined product portfolio from us.

Different models required different actions, some did not require any actions as they are already compliant. Fitting a modulating burner to suspended warm air heaters & two stage burners to floor standing models ensured compliance. In the case of radiant tube heaters, an increase in length on some models and a modified reflector shape also ensured compliance.

The extensive product range offered by Nortek meant that a large amount of time was needed to test each and every product to ensure compliance levels were met. Those that fell short of the required criteria were subject to additional work and testing, or if it was felt that the product would not meet the necessary requirements it has been withdrawn.

This very much depends upon the model of heater. For example: RHeco already complies, as do some radiant heaters. Some warm air heaters will feature an enhanced burner control, which will incur a small charge, whereas some other products may have undergone a greater level of work, and be subject to a slightly higher price increase.

Inevitably, compliance with the new ErP directive implies substantial development costs for our products, which will be reflected in the selling price, such as Reznor ErP unit heaters. Being able to offer ErP compliant radiant heating and ErP compliant warm air heating enables us to provide you with the most energy efficient products available in order to increase delivered value.

To assist you with any queries you may have regarding ErP Directive unit heaters, such as “is my radiant ErP compliant?” or “is my unit heater ErP compliant?” please visit our contact page.

As well as this dedicated ErP site, we also have a dedicated email address that you send any questions or queries relating to the ErP Directive to; erp@nortek.com or contact us on 01384 489700.