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Old 27-06-2009, 10:15   #16
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How good does the portable air conditioner work, and how long have you used it?
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Old 27-06-2009, 12:36   #17
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Originally Posted by jcclark2823 View Post
... Blower motors was the way I was thinking of going as well. I can install one right above the unit to bring in air and then one higher in the locker to take out the heater air. I'm going to try it today so I'll let you all know how it went.

You generally want about 400 - 500 CFM per Ton* cooling ambient (unheated) air across your condenser.
A smaller window A/C unit of 6,000 BTU/h, would therefore require about 200-250 CFM (outside) airflow.
Typical bilge blower fans are rated between 100 - 150 cfm, roughly half of what you’d need, were they configured to be fully effective.
I cannot imagine circumstances where, even two (150 CFM), bilge blowers would effectively ventilate a cockpit locker, in your proposed application.
I think most of the previous advice to locate the condenser outside (hatch/companionway) is appropriate.

* In North America, a standard ton of refrigeration is 12,000 BTU/h (3517 W).
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Old 30-06-2009, 17:35   #18
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AC

Installed a 5000 btu unit in the companion way hatch area on my Nimble Nomad Trawler. I remove two of the hatch boards and replace them with the AC unit. I made a board for the AC unit to fit in and it works great. No power issues as the boat has 30 amp service installed. I plug the unit into a GFI panel inside the boat.
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