The Eurovent Certified Performance (ECP) programme scope for Heat Recovery Systems with Intermediate Heat Transfer Medium (HRS-COIL), applies to all twin coil heat exchangers that correspond to the category IIa (“without phase change”) of the EN 308:1997 standard, that is attributed to Run Around Coil systems.
The present programme does not cover other types of air to air heat exchangers like Air to Air Plate Heat Exchangers (AAHE) or Air to Air Regenerative Heat Exchangers (AARE) for which dedicated Eurovent Certified Performance programmes exist.
Whenever a company participates in the programme for twin coil heat exchangers, all heat recovery systems that are promoted by the applicant/participant to end-users, specifiers, trading companies, contractors by means of paper or electronic catalogue, price list or software within the scope of the programme, shall be certified. This is done in accordance with the Technical Certification Rules and includes all models in modular ranges. For the twin coil heat exchanger programme, the certify-all requirement is applicable not only to the European market but worldwide also, and is defined in the Certification Manual.
Twin coil heat exchangers, also known as run around coil systems, or a heat recovery system with intermediary heat transfer medium, are designed to transfer thermal energy (sensible or total) between exhaust and supply air flows. They do this by the means of two or more heat exchangers, and an intermediary heat transfer medium, which depends on the differential of temperatures.
Run around coil systems are typically used in heat recovery applications to reduce heating or cooling loads in air handling units (AHUs) in buildings, but they can be used in other applications, such as in the exhaust gases of an industrial process. Applications are wide and varied, and include hospitality, retail, commercial, sports and leisure, education, healthcare and industrial.
A twin coil system consists of a coil in the extract air called an exhaust coil, and a coil in the supply air called a supply coil, that are linked via a pumped pipework system. The coils can be made from a range of materials, with heat exchanged between the coil and air stream via convection. The pipework system acts as a heat transfer medium, to transfer the recovered energy from one coil to another. It typically uses a water-glycol mix to either pre-heat or pre-cool the incoming supply air. Importantly, these systems do not mix the air streams.
Twin coil heat exchangers offer a sustainable way to lower energy consumption. However, the length of the pipework run between coils can affect energy efficiencies. Therefore, twin coil systems offer an effective solution for heat recovery when supply and return air streams are sited in different areas and plate or rotary heat exchangers are not an option.
While exploring our certified products you’ll come across a number of technical terms relating to certification. The below definitions help explain the search criteria in our certified product directory.
Certified product types in the Heat Recovery Systems with Intermediate Heat Transfer Medium programme have the following search criteria in common.
Brand
Brand name of the manufacturer.
Range
Listing of models with some common features.
Model
Model name.
Pitch Height Supply coil
The pitch height relates to the tube spacing of the Supply Coil, perpendicular to the airflow. Measured in mm.
Pitch Depth Supply Coil
The pitch depth relates to the row spacing of the Supply Coil, in the direction of the airflow. Measured in mm.
Tubes alignment Supply Coil
Is the alignment of the tubes in the Supply Coil, options include in-line or staggered.
Tube nominal OD Supply Coil
Is the tube nominal outside diameter of the Supply Coil. Measured in mm.
Number of rows min Supply Coil
Is the minimum number of rows in the Supply Coil. A row is a bank of tubes that are located in a plane at right angle to the direction of the airflow.
Number of rows max Supply Coil
Is the maximum number of rows in the Supply Coil.
Number of tubes min Supply Coil
Is the minimum number of tubes in the Supply Coil.
Number of tubes max Supply Coil
Is the maximum number of tubes in the Supply Coil.
Finned length min Supply Coil
Is the minimum finned length of the Supply Coil. Measured in mm.
Finned length max Supply Coil
Is the maximum finned length of the Supply Coil. Measured in mm.
Factory country
Country of manufacture.
Factory city
City of manufacture.
Software version
Version of software selection tool.
Software name
Name of software selection tool.
Search for certified products in our Twin Coils Heat Exchanger programme via our certified product directory.
The following performance items are certified:
Search for certified products in our Twin Coils Heat Exchanger programme via our certified product directory.
Find out how to apply for the Twin Coils Heat Exchanger programme.
Search for certified products in our Twin Coils Heat Exchanger programme