Reply
 
Thread Tools Display Modes
 
Old 11-12-2017, 11:46 PM   #1
Member
 
City: Lutz
Country: USA
Join Date: Jan 2016
Posts: 5
RV rooftop Air Conditioners

Just wondering how well RV type rooftop Air Conditioners work on Trawlers?? And which brand is good? Thanks
__________________
Advertisement

geoleo is offline   Reply With Quote
Old 11-12-2017, 11:56 PM   #2
Veteran Member
 
senangsekali's Avatar
 
City: Victoria
Country: Canada
Vessel Name: Senang Sakali
Vessel Model: North Sea 37
Join Date: Jun 2017
Posts: 36
That would be nice if you find a small one.
__________________

senangsekali is offline   Reply With Quote
Old 11-13-2017, 12:07 AM   #3
Senior Member
 
Pura Vida's Avatar
 
City: Knoxville
Country: usa
Vessel Name: Pura Vida
Vessel Model: 08 Meridian 490 Pilothouse
Join Date: Apr 2014
Posts: 258
A friend installed one and it worked well. He did not want a water source.
Pura Vida is offline   Reply With Quote
Old 11-13-2017, 12:53 AM   #4
Guru
 
City: Sydney
Country: Australia
Join Date: Jul 2015
Posts: 1,345
What design of boat ? Island Gyspy or ?
With all the windows in the IG 32 I will require min 18000btu or 20000to be safe due to all the window glass that would be 3 RV 12v units
gaston is offline   Reply With Quote
Old 11-13-2017, 01:52 AM   #5
Guru
 
Insequent's Avatar
 
City: Brisbane
Country: Australia
Vessel Name: Insequent
Vessel Model: Ocean Alexander 50 Mk I
Join Date: Mar 2012
Posts: 1,424
I have toyed with the idea. One issue will be where will it fit? In my case, running it underway would likely blast the helm with cold air, which would be a negative. My only genny is a pair of Honda's, which would likely power it OK but I would not want to run them regularly for extended periods. Noise/fumes.

At present I'm happy with using fans, and can easily run them through the night as well.
__________________
Brian
Insequent is offline   Reply With Quote
Old 11-13-2017, 06:07 AM   #6
Senior Member
 
Keysdisease's Avatar
 
City: South Florida
Country: USA
Join Date: Sep 2014
Posts: 460
There are marine units, I had one on my Mainship. They work, they are loud, they need very good ventilation for the exhaust air, you need a pretty good hole in your overhead, condensation water dripping down the side of the cabin. Mine was tucked up under the front of the flybridge with the exhaust pointed aft, straight at my legs when at that helm.

Like many things on a boat they are a compromise. I don't know what differences there are between RV and Marine units, but mine was reliable. 11 years of trouble free service.

If it had not come with the boat I would have not have chosen a rooftop, too loud and precludes the use of the flybridge when on.

You see them on a lot of small patrol and commercial vessels, simple installation, inexpensive, reliable.

Keysdisease is offline   Reply With Quote
Old 11-13-2017, 06:31 AM   #7
Senior Member
 
boomerang's Avatar
 
City: Kilmarnock VA
Country: united states
Vessel Name: YellowBird
Vessel Model: 1978 Mainship m1 #149
Join Date: Apr 2016
Posts: 147
I never have been too keen on those installed on smaller boats. I view them as more of a temporary solution to an AC unit designed to be installed below decks. I like them on the commercial ships that I work on; the roof is flat so they don't leak plus do a good job of cooling the wheelhouse since cold air falls to the floor. They are kind of loud & awfully big to have on an already crowded bridge, especially if it's tucked up under the helm area.
boomerang is offline   Reply With Quote
Old 11-13-2017, 06:58 AM   #8
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,512
They work well, and only require a 14x14 hatch to operate thru.. although the overall footprint is larger.

RV have the same hassles as boats , frequent rotten electric from a power pole , so the need to start / operate at low voltages.

Most are very quiet at lower fan settings , reverse cycle for heat in not very cold places (over 40deg F) or a resistance element for colder operation.

Mounted any place where it would not be swept by waves would be fine.

They are fairly heavy 120 lbs or so , the cabin top might be required to handle 4x that weight for G loads.
FF is offline   Reply With Quote
Old 11-13-2017, 09:02 AM   #9
TF Site Team
 
Pack Mule's Avatar
 
City: Paris,TN
Country: USA
Vessel Name: William
Vessel Model: Outer reef 32
Join Date: Jan 2013
Posts: 2,501
That's what we have. It cools great but like others have said they are loud. Mine is old and I think a newer unit wouldn't be so loud. Simple drain.
Attached Thumbnails
Click image for larger version

Name:	IMG_2778.jpg
Views:	115
Size:	154.7 KB
ID:	70308  
__________________
Marty
Pack Mule is offline   Reply With Quote
Old 11-13-2017, 09:09 AM   #10
Newbie
 
City: Colfax
Country: usa
Vessel Name: Curt's Dream
Vessel Model: Custom
Join Date: Nov 2017
Posts: 4
I have a coleman polar cub 9200 btu unit on my boat. This is a low profile unit. My Honda 2000 will start and run this unit no problem. The unit from the factory is pretty noisy but there is an after market quiet kit available. I installed the quiet kit and now the unit is real quiet. You now have to be closer than 10' from the boat to hear it running. Yes, there is some water that will run off the roof when its real humid out. Inside the cabin running, the boat motor makes noise than the A/C unit. The only down side is the thermostat turns the unit off when the cabin temp is about 73 degrees. I think it looks fine on my roof.
Attached Thumbnails
Click image for larger version

Name:	IMG_0500.jpg
Views:	117
Size:	169.0 KB
ID:	70309  
Boatbuilder1 is offline   Reply With Quote
Old 11-13-2017, 09:50 AM   #11
Member
 
SonofaSailor1's Avatar
 
City: Bossier City, LA
Country: USA
Vessel Name: Son of a Sailor
Vessel Model: Bertram 46 M/Y
Join Date: Dec 2016
Posts: 6
We are using a roof mount on a 47 Bertram. Living in living in Louisiana there is a lot of stuff in the bayou water and now on the Red River that will plug AC pumps and screens. Yes it is a little noisy but very low maintenance. We are using a Duo Therm Brisk Air. Plastic case and drain pan to minimize rust stains. All good after 3 years. Also has a soft start capacitor available that will allow the 13,500 BTU unit to run on portable generators. Read about this idea on the RV blogs. Oh, on the heat side, not so good it will take the chill off a cool morning but that's about all.
SonofaSailor1 is offline   Reply With Quote
Old 11-13-2017, 11:27 AM   #12
Guru
 
HiDHo's Avatar
 
City: Scottsboro, Al.
Country: USA
Vessel Name: Hi-D-Ho
Vessel Model: 1987 Krogen Manatee
Join Date: Feb 2012
Posts: 734
GeoLeo check out mini split air conditioners. No large hole needed, sized 3/4 to 3 ton, they cool, heat, ventilate and dehumidify. Very quiet compared to rv units. Sold at big box stores, 12,000 btu units under $1000.
HiDHo is offline   Reply With Quote
Old 11-13-2017, 05:43 PM   #13
Member
 
TugYacht_33's Avatar
 
City: Fayetteville
Country: USA
Vessel Name: Mhyzhen
Vessel Model: Custom 33' Glen-L design "union jack"
Join Date: Nov 2017
Posts: 15
best thing about the mini splits is you can have a couple different zones running off of a single main unit, and are super quiet
TugYacht_33 is offline   Reply With Quote
Old 11-13-2017, 05:58 PM   #14
Guru
 
City: Sydney
Country: Australia
Join Date: Jul 2015
Posts: 1,345
Quote:
Originally Posted by TugYacht_33 View Post
best thing about the mini splits is you can have a couple different zones running off of a single main unit, and are super quiet



The only disadvantage is finding where to locate the massive head unit .
gaston is offline   Reply With Quote
Old 11-13-2017, 06:30 PM   #15
Veteran Member
 
KenM's Avatar
 
City: Stockbridge,Vt - Punta Gorda,Fla.
Country: usa
Vessel Name: Satori
Vessel Model: 1984 34 Mainship
Join Date: Aug 2016
Posts: 32
Have one on my Mainship 34. It does take up some of the flybridge, but I don't need through hulls, nor have to deal with raw water pumps. It certainly does the job. Not all that noisy either. It is located near the rear of the flybride I'm going to build a PVC bench over it and it will then be seating on the flybridge.
KenM is offline   Reply With Quote
Old 11-14-2017, 05:40 AM   #16
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,512
One unmentioned advantage is , should the unit fail a replacement is a half hour to install, and probably cheaper than a service call for the historic systems.
FF is offline   Reply With Quote
Old 11-14-2017, 08:04 AM   #17
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,355
The land based units are popular on houseboats where space is readily available. Seen many on the inland rivers and desert lakes.

Once into salt water the spray can corrode some parts and pieces fairly quickly. But if at the dock most of the time no spray! Some marinas have noise restrictions. I'd not want a noisey one berthed next to me.
sunchaser is offline   Reply With Quote
Old 11-14-2017, 08:46 AM   #18
Guru
 
City: kemah
Country: USA
Join Date: May 2015
Posts: 997
Quote:
Originally Posted by TugYacht_33 View Post
best thing about the mini splits is you can have a couple different zones running off of a single main unit, and are super quiet
I put a 2 ton mini split on my boat last july/august. I am amazed at how quiet and economical it is. I will eventually buy an additional 9K btu mini for the rear berth. Both are/will be 220Vac so won t have to worry about balancing the lines.

Since my boat is a slip queen while I rework it, I simply set the outdoor piece on my flybridge. When I get to installing it permanently I will put the indoor unit inside of the flybridge and then duct it to both sides of the salon and into the forward galley. I bought a water cooled condensor to replace the ginormous air cooled one that came with it, so when I swap that out I will repackage and mount the condenser and compressor in the engine room and do the same for the little one for the rear berth.

I will say this about them. I am amazed at how quiet they are, and equally amazed at how little power it takes to run them. I have never seen the compressor take more than 8 amps at full loading and it typically draws 2 amps at night and 3 - 5 during the day. The boat came with 2 - 16k btu marine all in one units that were loud and sucked power. The mini split is sooooooo much better.

As an aside I see zero issues running them on the inverter overnight. Also Dometic and I think coleman? make marine roof tops. But be prepared to pay for therm.
what_barnacles is offline   Reply With Quote
Old 11-14-2017, 09:59 AM   #19
Member
 
friz's Avatar
 
City: Melrose
Country: USA
Vessel Name: Chez Reagan
Vessel Model: Cargile Cutter
Join Date: Jan 2016
Posts: 11
This is not my boat but I have the same one, a Cargile Cutter. I took the Coleman AC off the 5th wheel when I sold it and mounted it in the same place as the photo. Works great. Noise is not an issue probably due to location. The photo was Sun Smiles. It was destroyed when blown off a trailer in Wyoming a few years ago.
Attached Thumbnails
Click image for larger version

Name:	Image 5.jpg
Views:	61
Size:	92.6 KB
ID:	70320  
friz is offline   Reply With Quote
Old 11-14-2017, 10:24 AM   #20
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,355
Quote:
Originally Posted by what_barnacles View Post
I put a 2 ton mini split on my boat last july/august. I am amazed at how quiet and economical it is. .
WB

Sounds like a great setup. I had them when working and living in Spain and also noted they were quite popular in other European locales. Will your's have a heat function or do you even need to worry about it in Kemah?
__________________

sunchaser is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 09:32 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012