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Old 05-19-2016, 06:00 PM   #1
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How Do You Keep Your Boat Cool In The Summer

In the 90-100 degree weather, that we have in Louisiana, how or do you try to keep your boat cool while in the marina when no one is aboard. I had the a/c on last summer for 4 months and cooked a unit. I have fans that I leave on but it just moves hot air.
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Old 05-19-2016, 06:05 PM   #2
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Trying to keep an empty boat "cool" in those conditions sounds like a losing proposition. Shade the boat, and use solar or 12v vents to expel the hot air. Moving the air around inside the boat as you say just moves the hot air. I would think you need to be able to draw the hot air out much like a house vent.
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Old 05-19-2016, 06:18 PM   #3
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Originally Posted by kartracer View Post
In the 90-100 degree weather, that we have in Louisiana, how or do you try to keep your boat cool while in the marina when no one is aboard. I had the a/c on last summer for 4 months and cooked a unit. I have fans that I leave on but it just moves hot air.
Did the same thing, toasted the salon unit. This summer I'm gonna set the thermostat at 80 degrees instead of 74! Might help take the stress off the units somewhat....
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Old 05-19-2016, 06:21 PM   #4
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We just keep our boat in the Pacific NW. Problem solved!
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Old 05-19-2016, 06:30 PM   #5
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We just keep our boat in the Pacific NW. Problem solved!
Ha! I was just going to suggest that a trip to Maune would do it...
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Old 05-19-2016, 06:37 PM   #6
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Or keep your boat in Maine.
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Old 05-19-2016, 06:45 PM   #7
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We set our 3 units on "moisture control" which keeps it from being hot and runs a couple of times an hour for a few minutes.
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Old 05-19-2016, 06:46 PM   #8
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I use open hatches and beer... :-)
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Old 05-19-2016, 06:49 PM   #9
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Florida. Keep two of the four units on - one down in the cabin area and one in the salon. Set at 78.
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Old 05-19-2016, 07:08 PM   #10
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Originally Posted by kartracer View Post
In the 90-100 degree weather, that we have in Louisiana, how or do you try to keep your boat cool while in the marina when no one is aboard. I had the a/c on last summer for 4 months and cooked a unit. I have fans that I leave on but it just moves hot air.

When we're not aboard in that kind of weather, I usually leave the ACs running with 'stats set to 80 or 82F.

Two 14 year old 16K BTU ACs.

What cooked your unit?

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Old 05-19-2016, 07:22 PM   #11
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Tech said unit ran 24/7 even with unit set at 78. Compressor will no longer compress.
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Old 05-19-2016, 07:33 PM   #12
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Tech said unit ran 24/7 even with unit set at 78. Compressor will no longer compress.
When I had to explain the reason for a component failure to a customer, I used to like saying..." It reached the end of its service life"!
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Old 05-19-2016, 07:42 PM   #13
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I installed a SolarStar ventilator onto the hatch in the pilothouse roof, which is the highest point internally. It has a high airflow when the sun shines, much better than the tiny boat vents that are available. I leave the insect screened ports in the cabins open, and thereby draw air right through the boat. It works really well to keep heat and humidity down to a reasonable level even with doors and windows locked up. I would not be comfortable leaving air conditioners running on shore power while not on board.

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Old 05-19-2016, 07:49 PM   #14
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Do the ac's have a dehumidify setting. Energy efficient and keeps the interior dry.
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Old 05-19-2016, 07:54 PM   #15
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I'm in a covered slip so that helps but I have a small fan in a open window that draws hot air out too.

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Old 05-19-2016, 08:13 PM   #16
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I'm in a covered slip so that helps but I have a small fan in a open window that draws hot air out too.

Kevin
Where does the air come from that replaces the air you draw out?
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Old 05-19-2016, 09:05 PM   #17
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Quote:
Originally Posted by kartracer View Post
In the 90-100 degree weather, that we have in Louisiana, how or do you try to keep your boat cool while in the marina when no one is aboard. I had the a/c on last summer for 4 months and cooked a unit. I have fans that I leave on but it just moves hot air.
Shade all exposed to the sun decks that have overhead in cabin or staterooms. If you can draw tarps down to rails to protect bulkheads all the better. Go to fore or aft hatch and install a strong fan blowing out. Go to the opposite end of the boat and open a hatch, a large hatch or 2 Windows. Close all other Windows, hatches, doors and so forth. Suck air in and pull through the boat and blow it out. You should be ok with the attic fan concept.
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Old 05-19-2016, 09:07 PM   #18
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When I had to explain the reason for a component failure to a customer, I used to like saying..." It reached the end of its service life"!
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Can I have permission to use that quote!!!!
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Old 05-19-2016, 09:07 PM   #19
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Or keep your boat in Maine.
Or a covered slip.
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Old 05-19-2016, 09:10 PM   #20
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Where does the air come from that replaces the air you draw out?
At the very least you have air intakes that go into your ER. Keep the ER hatch open and the air runs through the typically cooler ER then exits out of the hotter Pilothouse.

Brian, those residential units look like decent option. With global warming, summers are getting warm even here in the PNW. I don't need AC, but a good way to vent the PH without opening the doors would be nice.
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