Quote:
Originally Posted by thetruth
All of your ACs are mareked with the SEER# a mathematical calculation of efficientcy. Ours is 15. I expect there are still some homes with 7 in the villages. Today 18 is readily available. The numbers and what they mean few understand-including me. I've been told by a claimed expert if I changed from 15 to18-roughly 30% my cooling bill would go down like 10%-HUH?
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Federal law requires a min of SEER of 13 and has since 2006, the standard before that was SEER 10, it was adopted in 1992. There are no SEER 8s here. They died long ago. SEER is how many BTUs per watt.
Your savings would be (in your example) 15/18 -100 HVAC savings percentage X the percentage of electricity for HVAC. Let's use my year to date useage of electricity for HVAC (since you probably don't know yours) 53.5%. Thus 16.6666 % HVAC savings X .535 or 8.916% savings on your electric bill.