I believe most marine AC units will only offset 20F from water temp. So unless you water gets to 100F you're still likely to get a reasonable offset of cooling. Even with 85F water this past weekend we were still able to bring the four units down to 72F.
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-- Bill Kearney
2005 Eastbay 47 FB - Solstice, w/Highfield CL360 tender
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