Arkansas HVACR NewsMagazine November 2018

S tate, National, Chapter News Tech News

follow and this includes matching the space SHR to a piece of equipment that will make a good match at similar conditions. It does often need some digging into manufactures specs to interpret this data for the equipment. In the following example from a Lennox unit, you can see that the SHR is listed and highly variable based on outdoor temperature, air flow setting as well as indoor wet bulb and dry bulb temperatures.

In this example, you would need to multiply the total capacity x SHR to calculate the actual sensible and latent capacity. The cool thing is that this understanding can help both designers and commissioning technicians to match equipment properly and even make further adjustments using airflow to get a near perfect match which leads to lower power consumption, less short cycling and better humidity control.

This edited article was provided in its original format by Bryan Orr with HVAC School for Techs. HVAC School for Techs has a plethora of material including articles, newsletters, podcasts, and videos. Link to their site @ https://hvacrschool.com/

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