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HVAC Ratings: SEER for 8 TR and more heat pumps?
 
  
 
  
 
 
 
 
 
 
    
        
        asked 8 years ago  
 
 rkbest's avatar  
 
 
 
 
    
        
        updated 7 years ago  
 
 __AmirRoth__'s avatar  
 
 
 
 
 
Recently I was told not to use SEER/EER ratings for heat-pumps of 8 TR capacity (or more) and to check when the rating can be used and not. I am unable to find any literature which suggests the limitation of using terms SEER and EER rating with capacity. Any insights on this topic?
 
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        answered 8 years ago  
 
 ericringold's avatar  
 
 
 
 
 
AHRI Standard 210/240 uses SEER as the performance rating metric for air-cooled heat pumps up to 65,000 Btu/h (~5.4 tons). 
 
AHRI Standard 340/360 uses EER as the (full-load) performance rating metric for air-cooled heat pumps up to 250,000 Btu/h (~20 tons). 
 
EER is also used for water-source heat pump cooling efficiency as defined in ISO 13256-1 and 13256-2. 
 
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        Asked:  8 years ago  
 
 
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        Last updated: Mar 06 '17 
 
 
 
 
 
 
 
 
 
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