

| Subject: | Re: Rooftop A/C Experiences 12 volt ac more seriously-Note |
| From: | David Beierl |
| Date: | Sun, 15 May 2011 15:51:19 -0400 |
At 02:11 PM 5/15/2011, Jeff Schwaia wrote: >Don't know about the Thermo King, but the Red Dot that I linked to is all >electric as well. Also, it only uses 33 amps (@ 12V) as opposed to the DC >Airco's 50 amps. Also, Jeff, 16,000 BTU/hr with 400 watts consumption is an EER of 40 which is completely out of sight. The DC Airco 8500 (~50 amp)-17,000 (~100 amp) BTU/hr units seem to be running EER about 14-15 which is well over the 10.7 EER required for an Energy Star rating for a window A/C and somewhat below the 16 required for a whole-house unit - since these are window-size machines that's excellent efficiency.* *Probably not directly comparable since the Energy Star and EER ratings are based on AHAM (?American Heating and Air Conditioning Mfrs Ass'n?) specs and these aren't; but the "EER" or energy efficiency rating as such is a bastard unit: BTU/hr divided by watts. Yrs, d
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