Hvac School - For Techs, By Techs

EER in the Field - Short #231

Informações:

Synopsis

In this short podcast episode, Bryan talks about EER (Energy Efficiency Ratio) and SEER (Seasonal Energy Efficiency Ratio) and how to calculate EER in the field. EER and SEER are ratings that we often see on equipment (as are SEER2 and EER2) based on a ratio of an output to an input. Whereas coefficient of performance (COP) is a direct ratio of watts out to watts in, EER and SEER account for BTUs and watts. EER and SEER indicate the cooling capacity (in BTUs) we get from the watts we put in. The ratio changes based on field conditions, and EER2 and SEER2 have more realistic test conditions than EER and SEER (the static pressure for systems rated below 65,000 BTUs per hour was 0.1"wc for EER and SEER, and it is now 0.5"wc for EER2 and SEER2, which is much closer to average field conditions). To determine EER, you have to figure out BTU production and stack it against your wattage. You'll need to know your delta enthalpy (delta H), multiply it by the CFM, and then multiply the product of those by 4.5 to get you