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Thread: SEER and HSPF
12-01-2012, 08:47 PM #1
SEER and HSPF
Here's my understanding of SEER ratings. Lets say you have a 16 SEER Air conditioner for example,that would mean for every Watt of electricity consumed, the equipment would produce 16 BTU's. So to speak if your AC is producing 36,000 Btus and drawing 2250 watts, then your AC must be in the range of a 16 SEER. SEER rating are also figured by testing the equipment in various load conditions (different temperatures inside and outside the house) and then the average of the results is figured in
However what I want to understand is, HSPF. What is HSPF exactly? Heating seasonal performance factor I know but how do they come up with their ratings? like for example, what is the difference in power consumption between a heat pump with a HSPF of 7 and one with a rating of 10. How many more Watts does the 7 HSPF consume and how well does one extract heat from the air better the other? I know at different temperatures this will vary. Someone chime in and help me understand. Give me some equations and explain in a easy to understand manner.
12-02-2012, 07:48 AM #2
HSPF is heating SEER. Averaged over the heating season and reflecting defrosts.
SEER is averaged too and most of the readings are in cool conditions so those in a hot climate should look more at EER which is 95° out and a good load inside.
12-02-2012, 10:20 AM #3
The HSPF even includes heat strips coming into play. But the thing I am wondering is how or what is really the difference in power consumption between a 7 HSPF and a 10 HSPF? like how much more kilowatts are used more than the other over a period of time and if there is a formula out to display this, then what is it?
12-02-2012, 11:44 AM #4
12-02-2012, 12:01 PM #5
12-02-2012, 12:08 PM #6
If you read on down the page you will see their quote "The HSPF rates both the efficiency of the compressor and the electric-resistance elements. The most efficient heat pumps have an HSPF of between 8 and 10."
There are other sources as well that explain that HSPF include the heat strips as a factor in determining overall efficiency of heat pump system
12-03-2012, 06:43 AM #7
COP is part of the HSPF calculation.Contractor locator map
How many times must one fix something before it is fixed?
12-03-2012, 04:50 PM #8
Does anyone know a resourceful website that explains HSPF and COP? Maybe AHRI has one?
12-03-2012, 09:14 PM #9
A diatribe I wrote for a former employer. http://sporlanonline.com/December%20...Cold%20WAR.pdfThe greater danger for most of us lies not in setting our aim too high and falling short; but in setting our aim too low, and achieving our mark. – Michelangelo
There are powers inside of you which, if you could discover and use, would make you everything you ever dreamed or imagined you could become. – Orison Swett Marden
Education is what remains after one has forgotten what one has learned in school. – Albert Einstein
12-04-2012, 08:00 PM #10
12-05-2012, 08:06 AM #11Professional Member
- Join Date
- Feb 2004
- Pacific NW
I love the title of that, SEER for dummies.
When SEER first was promulgated, thought (and still do) it was a bureaucratic concoction to enable the social control freaks to attach a simplistic (which became administrative nightmare for some) number to hardware vs. plain old COP and conditions.
Still prefer to use COP and operating conditions.