AHRI performance certification

When suppliers of heat exchangers apply large sizing tolerances, it creates uncertainty about heat exchanger performance. However, there is a solution that can remove this uncertainty – AHRI performance certification – the only global third-party performance certification for plate heat exchangers.

How to eliminate uncertainty about thermal performance in plate heat exchangers

For many years it has been a common practice in the plate heat exchanger industry to “adjust” or tweak heat duty calculations. Manufacturers manipulate calculations so that component costs can be minimized and a smaller plate heat exchanger can be offered at an attractive price. However, the result is that end customers get under-dimensioned heat exchangers, leading to higher system-wide energy use, higher operating costs and compromised environmental performance.

These “recalculations” makes it harder to choose a heat exchanger that will provide the required performance and increases the risk that it will underperform. It creates uncertainty for everyone involved in recommending, selecting and using heat exchangers – consultants, specifiers and end customers – and undermines confidence in the industry as a whole. The degree of under-dimensioning has been growing year by year and it has become the plate heat exchanger industry’s biggest problem.  

Certification ensures certainty about performance

There is one sure way to ensure certainty right from the start – AHRI performance certification.

The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) is the only independent organization that certifies the performance of liquid-to-liquid heat exchangers globally. AHRI is a non-profit organization.

The AHRI Certification Program provides third-party verification of thermal performance – it gives independent assurance that the plate heat exchanger will perform in accordance with the manufacturer’s published ratings.

 The benefits of performance certification

The wider adoption of AHRI performance certification makes sense for all concerned:

  • Lowers energy consumption and reduces lifetime operating costs significantly by assuring a more energy-efficient system.
  • Ensures full investment value by reducing costs for field tests and additional component performance margins.
  • Enables fair comparisons of thermal performance andprice/performance ratio, as calculations have been verified.
  • Ensures that targets for power consumption and climate control can be met by adequate dimensioning of the heat exchanger capacity.
  • Provides peace of mind for those who rely on system performance – suppliers, consultants, contractors and end users.
  • Places focus on energy efficiency, which fosters innovation and stimulates manufacturers to develop more efficient products.
  • Eliminates cheating from thermal performance, which enhances confidence in the industry.

 Alfa Laval has chosen to take an active role in promoting AHRI certification.

From every perspective, AHRI performance certification is better for everyone involved in the process of designing, producing, selecting and operating plate heat exchangers.

We believe that performance certification is an important step in creating a sound plate heat exchanger market and benefits the industry as a whole.


For more information on AHRI certification read The case for thermal performance certification and visit the official AHRI website.

AHRI certification programs:

Liquid to Liquid Heat Exchangers

Liquid to Liquid Brazed Fusion Bonded Plate Exchangers

AHRI uses

Technical information on AHRI certified plate heat exchangers from Alfa Laval

AHRI performance certification (official website)

 Alfa Laval reference list AQ units 

New York City - the ultimate test laboratory for heat exchangers in cooling applications


Heat exchanger performance - a crucial but long neglected parameter for energy-efficiency in cooling systems. 

AHRI certified

AHRI is an organization promoting quality and safety within the North American HVAC industry. It is one of the largest trade associations in North America, representing more than 300 manu-facturers within the global HVAC industry. 

AHRI members account for more than 90 percent of the residential and commercial air conditioning, space heating, water heating and commercial refrigeration equipment manufactured and sold in North America. It runs around eighty different certification programs whereof AHRI 400 for liquid-to-liquid heat exchangers is one.