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Not sure how to figure out the seer rating Maybe call the manufacture or wait for hvac tech to respond. Thanks.

I think there is a little formula you can use to figure the tonage. The hvac techs would know for sure. As jnas stated it's 2.5 ton.

Take the 5th,6th, and 7th digit it the model number and divide by 12. so in your case, 030 divided by 12 = 2.5
 

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According to Preston's Guide it was manufactured from 1993-1995, btu rating of 28,600 and a SEER of 11. That would put it in the 2.5 ton category.

NOTE: SEER ratings for split-systems are only given to outdoor units with the understanding it depends on which indoor equipment is used. The term "tonnage" is a generic term and doesn't really say much detail about btus. You could replace that machine with another "2.5 ton" and only get 26,600 btu out of it but it have a rating of 14 SEER. See when manufs decrease power it increases efficiency but what they don't tell you is there aren't as many horses under the hood. So what I'm saying is TONNAGE, BRAND and SEER are only words of trickery, in my opinion, to get the customer to bite. They really don't mean much to hvac techs.
 

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SEER is rated by AHRI and is listed in the performance tables of York and AHRI.

As the unit ages and the compressor wears it loses efficiency so it was 11 new, now it is less.
 

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Discussion Starter · #7 ·
I figured it was a 2.5 ton but 11 seer seems good for such an old unit. I'll admit I don't know anything other than the higher the seer the higher the efficiency. Their unit actually still works really good and they were just curious because I am having my heat pump and air handler replaced on monday. Thanks for the quick responses! They will be looking into replacing the unit when ever they decide to put the house on the market.
 

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Discussion Starter · #8 ·
SEER is rated by AHRI and is listed in the performance tables of York and AHRI.

As the unit ages and the compressor wears it loses efficiency so it was 11 new, now it is less.
Mine is 10 seer and 16 years old with a leak in the coil. Tech told me I was probably getting 2 seer from it and I believe it since last month's electric bill was $250 and it wasn't all that cold!
 
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