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Old 18-05-2021, 20:27   #1
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Staying cool at night

Hey there!

I am new to this forum, so please forgive me if this has already been discussed...

I am writing a blog for a sailing company and I am seeking feedback on how you stay cool at night...

What tips and tricks do you have for new cruisers/sailors?

Thanks in advance!
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Old 18-05-2021, 21:08   #2
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Re: Staying cool at night

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Originally Posted by CaptainAwesome View Post
Hey there!

I am new to this forum, so please forgive me if this has already been discussed...

I am writing a blog for a sailing company and I am seeking feedback on how you stay cool at night...

What tips and tricks do you have for new cruisers/sailors?

Thanks in advance!

It depends on what you mean by cool.



The die hards will tell you to anchor out so the boat will swing to the breeze (if there is any) and so provide a cooling flow through hatches and after market wind scoops. Some multi hulls open their escape hatches to catch breeze off the water.



Others will tie up to a dock and run the boats air conditioning or water coolers off shore power.. One cheap but ugly solution is to use cheap air cooled household domestic units jammed into a window.


Those with lots of money will buy enough lithium batteries and solar or muffled water cooled generator or other charging sources to provide enough grunt to run the on board marine air conditioners all night without need of a generator if the battery bank is up to it.



Then again others will make do with a 2KV noisy air cooled generator to power their air con on minimal settings.


The problems the die hard and the minimalists have is that if you are anchoring in summer near midges, sand flies no-see-ums, biting flies and gnats is that you will need insect screens which really degrade breeze flows. Those with under powered solutions "make do" but can usually only do one cabin and not all night and so still sweat it out, better than nothing, just an irritant for neighboring boats.




From our own anecdotes of the matter we had an Onan generator that would run aircon, water maker, clothes washer, charge batteries and heat water and also dehumidify the boat to reduce mold - without ever needing to touch a dock except for fuel or rely solely on additional high power solar arrays. The costs is the capital investment,fuel and maintenance. An alternative is to run a propulsion engine with a large alternator, but that is not a good long term solution for that engines life.



IF the solar route, the high costs is Lifpo batteries and electronics, and really high costs if installed by professional marine electricians to do it properly and safely as opposed the the DIY brigade.



One downside to solar of course is that a week of overcast weather with zero wind and hot sticky humid tropical bug filled nights only needs to occur a few times for it to make you think again. Carry a lot of deet.



So basically it comes down to location and weather/insects and budget.
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Old 18-05-2021, 22:31   #3
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Re: Staying cool at night

We keep all opening hatches and the companionway hatch open but covered with insect netting. As the previous post notes, airflow is sometimes (much of the time?) constrained. So we also use 12V oscillating fans. This approach worked for us in Mexico and then in French Polynesia.

We lived and cruised in Indonesia for several years and the only way to keep cool was to sleep on deck or in the cockpit. There was usually a breeze, sometimes rain and always mosquitoes.
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Old 19-05-2021, 00:10   #4
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Re: Staying cool at night

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...I am seeking feedback on how you stay cool at night...
My preference is for being warmer, but if cool's your bag, then mooring or anchoring somewhere further away from the Equator generally works.
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Old 05-06-2021, 19:08   #5
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Re: Staying cool at night

I try to stay cool at night by continuing to wear my sunglasses. Results may vary.
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Old 05-06-2021, 19:18   #6
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Re: Staying cool at night

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I try to stay cool at night by continuing to wear my sunglasses. Results may vary.
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Old 06-06-2021, 04:56   #7
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Re: Staying cool at night

well right now I am at slip so run the AC
sometimes at anchor or on a mooring I run the Honda plus the AC
sometimes I leave the hatches open, but I don't think this does much more that let rain in
we have fans in the boat

all these things except running that AC are just to reduce how hot we get, they don't cool at all
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Old 06-06-2021, 05:03   #8
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Re: Staying cool at night

in the deep south of the US .. there are many warm nights with no breeze coupled with extreme humidity. boat fans help a lot. maybe you can try wearing your sunglasses
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Old 03-08-2021, 23:48   #9
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Re: Staying cool at night

I installed 3 caframo programmable 12 v fans. Minimal amp draw, 2 4 or 6 hour timer function and hi or low speed. 1 near theforedeck hatch which had a tent screen, the other 2 drawing that hatch air towards the heads of the 2 berths. Worked great even in miserable heat.
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Old 03-08-2021, 23:57   #10
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Re: Staying cool at night

Quote:
Originally Posted by CaptainAwesome View Post
Hey there!



I am new to this forum, so please forgive me if this has already been discussed...



I am writing a blog for a sailing company and I am seeking feedback on how you stay cool at night...



What tips and tricks do you have for new cruisers/sailors?



Thanks in advance!


Fans , hatch Wind scoops, good mosquito hatch netting , simples.
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Old 04-08-2021, 02:22   #11
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Re: Staying cool at night

Have a hammock, on the deck if it's fine weather and below if not. A fan and wind scoops. Anchoring from the stern helps to get the breeze in..
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Old 04-08-2021, 04:56   #12
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Re: Staying cool at night

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Have a hammock, on the deck if it's fine weather and below if not. A fan and wind scoops. Anchoring from the stern helps to get the breeze in..


What about the mozzies ?
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Old 04-08-2021, 09:11   #13
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Re: Staying cool at night

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What about the mozzies ?
Mosquito net?
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Old 04-08-2021, 14:35   #14
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Re: Staying cool at night

Yes, treating screens with pyrethrins at the beginning of the season discourages sand flies. Treating bed nets and using them for cockpit enclosures as well as below is brilliant: flies and mozzies land, and drop off dead! Woohoo! Needs re-treating when they quit falling off. Light weight, light color, long sleeved, long pants or skirt also treated for going ashore in areas where the mozzies transmit nasty diseases. Just one outfit, will go for about 3-6 months, unwashed. If you wash it, then it requires new treatment. I used the same water + pyrethrins solution as the bed nets to do the cotton clothing.

I have used the Cutter repellent on my face, as well. Always have deet on board. Wash it off at night, skin doesn't really like it.

Ann
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Old 04-08-2021, 15:33   #15
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Re: Staying cool at night

I start with a white deck. Not off white....WHITE. If you cannot stand on your deck in midday sun in bare feet without blistering them then likely your boat is literally cooking all day long and has probably many hrs of heat buildup to dissipate after dark.

And there's the added advantage of having a cool boat all day long of course....but that was not the OP's question.

I heard years back a statement "there's two colors you can paint a boat, white and stupid". I thought that pretty damn accurate.

Please note that is obviously for warmer climates. If I were a forced to exist in a cold climate I would likely have a black boat with black decks'

Not arguing or dealing with the trolls, just throwing some experience the OP's way, since he asked.
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