Im in the AC business...primary resale and distribution of ductless type systems and have a technical question regarding the relation between SEER (energy efficiency) and capacity. I don't know if there are similar patterns with central forced but I've noticed with ductless units, a smaller capacity will always correlate directly with a higher SEER value. This pattern repeats across all the single zone series of ductless brands in the market. It's always the same: your smallest capacity 9000 BTU systems will feature the highest SEER and as the capacity goes to 12k-18k-24k etc., the SEER value always drops. I have some makes that start off at 23 SEER for the 9000 BTU that will dip all the way to 16 SEER by the time that same brand and make gets into the 36000 BTU range. Does anybody know why this is?
(Sorry if this isn't in the right place - couldn't find the right forum for this question)