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06-19-2018, 04:00 PM
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#1
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Senior Member
City: Madisonville
Vessel Name: Aku Uka
Vessel Model: 43’ DeFever
Join Date: Feb 2011
Posts: 213
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Leave A/C running when away?
Quick question, finally got all my new A/C units installed and going, one in berth, one in salon, one in galley. Should I leave one or more units running during the weekdays when no one is on the boat? We use it every weekend only. I have a frig that I'm concerned about get to hot with the units off. Advice please.
__________________
41' Litton
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06-19-2018, 04:28 PM
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#2
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Valued Technical Contributor
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,775
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Well, yes, maybe. I would leave just one unit on, set at about 80 (during summer) to keep the temps and humidity down. But make sure that all sea water connections are good, particularly the one from the raw water pump and the one to the thru hull discharge. You don't want to fill your boat with water.
David
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06-19-2018, 04:33 PM
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#3
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Senior Member
City: Lafayette, LA
Vessel Name: presently boatless
Join Date: Dec 2014
Posts: 350
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Hot as it is down here in summer, I would leave them set on 78*. Winter I set it just on dehumidify.
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06-19-2018, 05:27 PM
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#4
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Senior Member
City: punta gorda, FL
Vessel Name: Blue Bayou
Vessel Model: Hatteras 43MY
Join Date: Jun 2016
Posts: 149
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Maybe it goes without saying, but be sure you keep bromine tabs in the condensate pans. A plugged condensate drain will soak your carpets...ask me how I know.
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Punta Gorda, FL
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06-19-2018, 07:21 PM
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#5
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Veteran Member
City: Parrish Fl
Vessel Name: Melody
Vessel Model: Mainship 350
Join Date: Apr 2018
Posts: 60
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Quote:
Originally Posted by wpc691
Maybe it goes without saying, but be sure you keep bromine tabs in the condensate pans. A plugged condensate drain will soak your carpets...ask me how I know.
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What does the Bromine tabs do?
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06-19-2018, 07:25 PM
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#6
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Senior Member
City: Norfolk, VA
Vessel Model: Bayliner 3870
Join Date: Jul 2015
Posts: 308
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I live aboard so I leave them running when it is hot or humid. Typically just the salon at around 78 to keep the humidity down.
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06-19-2018, 07:46 PM
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#7
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Senior Member
City: punta gorda, FL
Vessel Name: Blue Bayou
Vessel Model: Hatteras 43MY
Join Date: Jun 2016
Posts: 149
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Quote:
Originally Posted by Djoub
What does the Bromine tabs do?
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Prevent slime/sludge from building up and blocking the condensate drain line. Work better than the pan tabs sold at HD/Lowe’s. Still need to put the wet vac on the condensate line thru hull every 3 months or so.
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Punta Gorda, FL
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06-20-2018, 06:21 PM
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#8
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,818
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I run a dehumidifier that drains into the galley sink. Run one air conditioner set at 80 degrees. The dehumidifier keeps the boat dry at around 50 % relative humidity.
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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06-20-2018, 06:54 PM
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#9
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Guru
City: Oriental N.C.
Vessel Name: true heading
Vessel Model: marine trader 38 dc
Join Date: Sep 2017
Posts: 572
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Quote:
Originally Posted by O C Diver
I run a dehumidifier that drains into the galley sink. Run one air conditioner set at 80 degrees. The dehumidifier keeps the boat dry at around 50 % relative humidity.
Ted
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what dehumidifier do you use? would you buy the same one again ? I don't feel comfortable leaving my air on . it's an old boat and you never know when a bad connection could pop up .also really strong winds can blow the water out and set her in the mud. we only use the boat every other weekend or once a month. but I would like to control the moisture inside.
I would love to here anyone's recommendation .
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06-20-2018, 07:07 PM
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#10
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Senior Member
City: Norfolk, VA
Vessel Model: Bayliner 3870
Join Date: Jul 2015
Posts: 308
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Curious about your dehumidifier as well? When it is cold and clammy I have to turn my AC down to the low 60's and I'd rather not
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06-20-2018, 07:55 PM
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#11
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Member
City: Punta Gorda
Join Date: May 2018
Posts: 13
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I use a cheap Home Depot dehumidifier. Cost about .12 boat units and has lasted 3 summers in Florida.
Mike
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06-20-2018, 08:13 PM
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#12
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Guru
City: Jacksonville
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 7,235
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We put the salon and forward cabin units on Humidifier mode and it works well for us.
We just had a blocked hose this past week that I blew out with a small inflator from HD.
I like the idea of a bromide tab though!
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06-21-2018, 06:01 AM
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#13
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Guru
City: Cary, NC
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,841
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I don’t know y’all. I have certainly contemplated the idea before, and down here in NC, it certainly gets hot enough to want to... but dang... I would never be able to sleep at night knowing there was a high-flow pump just waiting to fill up my boat with water. Sure, chances are very low. And while lots of people do it and I have never heard of a boat sinking from this, to me, it’s not worth the risk.
__________________
2000 Navigator 4200 Classic
(NOT a trawler)
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06-21-2018, 06:08 AM
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#14
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,119
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I worry too......have thought about a 110v relay to ac and pump (or just pump) controlled by a float switch or water sensor.
If it was just to the pump, my ACs throw a code and shut down.... but I think I would prefer just cutting the power.
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06-21-2018, 06:31 AM
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#15
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Senior Member
City: Hong Kong
Join Date: Nov 2012
Posts: 247
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I leave mine running, have no concerns about it as the system is keel cooled so water intake is not required...
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06-21-2018, 06:49 AM
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#16
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,818
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Quote:
Originally Posted by timb
what dehumidifier do you use? would you buy the same one again ? I don't feel comfortable leaving my air on . it's an old boat and you never know when a bad connection could pop up .also really strong winds can blow the water out and set her in the mud. we only use the boat every other weekend or once a month. but I would like to control the moisture inside.
I would love to here anyone's recommendation .
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https://www.amazon.com/gp/aw/d/B00UW...op_mb_pd_title
This is the unit I purchased. Very happy with the unit and would purchase it again. Noteworthy points are:
30 pint dehumidification per day
Programmable humidistat
Fan shuts off when not dehumidifying
External hose connection
Cleanable air filter
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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06-21-2018, 07:07 AM
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#17
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Guru
City: Cary, NC
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,841
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Quote:
Originally Posted by psneeld
I worry too......have thought about a 110v relay to ac and pump (or just pump) controlled by a float switch or water sensor.
If it was just to the pump, my ACs throw a code and shut down.... but I think I would prefer just cutting the power.
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I too have considered the same kind of rig, but my pump is below the waterline, so I would still worry about water intrusion. Not sure if the worry is valid, but I would still not be comfortable with it. YMMV ;-)
__________________
2000 Navigator 4200 Classic
(NOT a trawler)
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06-21-2018, 07:34 AM
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#18
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Guru
City: Aventura FL
Vessel Name: Kinja
Vessel Model: American Tug 34 #116 2008
Join Date: Oct 2017
Posts: 10,595
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I leave one A/C on.
I am gone for 2 month and when I get back, all is well.
__________________
Two days out the hospital after a week in the hospital because of a significant heart attack.
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06-21-2018, 07:42 AM
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#19
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Guru
City: North Carolina for now
Join Date: Aug 2011
Posts: 6,348
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Quote:
Originally Posted by Tom.B
I don’t know y’all. I have certainly contemplated the idea before, and down here in NC, it certainly gets hot enough to want to... but dang... I would never be able to sleep at night knowing there was a high-flow pump just waiting to fill up my boat with water. Sure, chances are very low. And while lots of people do it and I have never heard of a boat sinking from this, to me, it’s not worth the risk.
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You don't feel your boat is seaworthy? Lack of plumbing integrity and bilge pump capacity? Do you now turn all your seacocks off when you leave your boat (some people with sketchy plumbing do this as a preventive measure for same). Do you shut shore power off at the pedestal too to prevent electrical fires?
The plumbing should be as solid as that of a house.
It won't be the pump action itself filling your boat with water, unless it is a poorly secured hose from the AC to the overboard through hull, as it will be shut down by the AC when water flow stops.
__________________
George
"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"
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06-21-2018, 07:52 AM
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#20
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Guru
City: Victoria TX
Vessel Name: Bijou
Vessel Model: 2008 Island Packet PY/SP
Join Date: Nov 2012
Posts: 5,290
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I’m too worried to leave the AC units on. Even though the boat is in hot and humid Florida, I just turn on my two little humidifiers and shut off the ACs. I’ve done that for about a year and no mold or mildew problems so far— even during the hurricane.
I’m not comfortable with a cooling hose breaking or condensate drain clogging.
These are the little humidifiers I have. I drilled a hole in the tank and just put them in the sink. https://www.amazon.com/hOme-Small-De.../dp/B072C3NMK1
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