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09-09-2016, 03:19 PM
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#1
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Member
City: Ohio
Vessel Name: Summer School
Vessel Model: Marine Trader 34 double cabin
Join Date: Mar 2015
Posts: 20
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Air conditioning for 1991 Marine Trader 34 DC
Looking for advice for installation location and ideal size for air conditioning on a 1991 Marine trader 34 double cabin. One or two units? Boat is in the great lakes and is mainly on lake erie. Heat is nice but not used often. Manufacturer suggestions? I installed a mermaid system on a 38 ft morgan sailboat about 10 years ago and was very happy. Do they still build to the same quality today?
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09-09-2016, 04:02 PM
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#2
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Guru
City: Chicago/Montrose Harbor
Vessel Name: Sea Jay
Vessel Model: Non Trawler ;-) Ask me if it matters LOL
Join Date: Jun 2016
Posts: 512
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Kip were you once a yacht broker in Florida?
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09-09-2016, 05:14 PM
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#3
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Valued Technical Contributor
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,775
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A single 16,000 btu unit ducted appropriately should work fine in the Great Lakes.
Webasto is available on line (Defender) and is quite a bit cheaper than the main supplier- Dometic's Cruisaire or Marineaire. Mermaid is probably available on Amazon at about the same price. Both are good.
David
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09-09-2016, 09:06 PM
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#4
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Member
City: Ohio
Vessel Name: Summer School
Vessel Model: Marine Trader 34 double cabin
Join Date: Mar 2015
Posts: 20
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Never a broker. Always been a teacher in Ohio
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09-09-2016, 10:13 PM
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#5
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,131
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I have had several Mermaids. Had good experiences with both. Good support when I needed it.
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09-10-2016, 06:41 AM
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#6
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Guru
City: Palm Coast
Vessel Name: Southerly
Vessel Model: 1986 Marine Trader 36' Sundeck
Join Date: Aug 2016
Posts: 1,231
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I am new to the "big" boat arena. I have 2 on my 36ft. Marine Trader. One is a cruiseaire and the other a marineaire. Both are original to the vessel. I like the cruiseaire better. 16,000 btu each.
It is nice to have the option of only running the aft cabin if I want.
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09-14-2016, 08:43 AM
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#7
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Senior Member
City: Oriental, NC
Vessel Name: M/V Major Award
Vessel Model: Senator 35 w/single Lehman
Join Date: Oct 2007
Posts: 423
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We have a Webasto 16K (replaced a Cruisair 2015) in our Senator 35. It has done a pretty decent job in our ENC climate. We have a Cruisair 6K forward that does not work which I will be replacing with another Webasto. Our previous boat had a Mermaid; it also performed well. Make sure your ducting is well thought out.
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09-14-2016, 09:24 AM
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#8
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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If you were down south I'd say 3 units.
But up north and if you're not planning on having people using the fwd sleeping cabin often you could use just 2 units.
Ocean Breeze
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09-19-2016, 09:13 PM
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#9
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Member
City: Ohio
Vessel Name: Summer School
Vessel Model: Marine Trader 34 double cabin
Join Date: Mar 2015
Posts: 20
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Thanks for the input. I think we'll see what the boat show prices are this winter and buy the most I can afford. Probably going mermaid or ocean breeze.
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10-07-2016, 05:01 PM
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#10
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Senior Member
City: Full time live aboard, East coast
Vessel Name: Vahevala
Vessel Model: 52’ Kristen Custom Flybridge Trawler
Join Date: Aug 2012
Posts: 100
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Just installed a Webasto FCF 16000 btu on our 37' trawler. Vented one so it goes to the master stateroom, the other to the saloon. Works great, a/c and heat. Not too concerned about forward cabin. I can't imagine needing 2 for a 34 ft. trawler. Bought ours from a dealer in Ontario, great price and exchange rate is in our favor. Installed under the settee.
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10-24-2016, 09:44 AM
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#11
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Senior Member
City: Kenosha, WI
Vessel Name: Tortuga
Vessel Model: Hershine 37
Join Date: Apr 2014
Posts: 253
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I just installed two 12K Webasto units under the satee in the salon on a 36 tri cabin. I needed 24 K and I find two medium units quieter than a 16 and small unit up front. I have one vent up front, two in the salon and one in the stern cabin. I use the y to balance the system as needed. Tinted windows and blackout shades. Works great in lake Mi.
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10-24-2016, 11:40 AM
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#12
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Guru
City: Trenton
Join Date: Apr 2012
Posts: 1,521
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I don't have A/C on my boat but I've looked into it. My boat is a 34' Marine Trader.
Most suggestions I got were a 5K unit for the forward cabin and a 16K unit for the saloon and master. Unless you are freezing meat, that seems a bit excessive for a boat in the mid-Atlantic region.
My gut feeling was for a 12K in the main cabin with good ducting to the fore and aft cabins. Still haven't done it though so this is just theory.
__________________
Al Johnson
34' Marine Trader
"Angelina"
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10-24-2016, 11:57 AM
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#13
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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Quote:
Originally Posted by alormaria
I don't have A/C on my boat but I've looked into it. My boat is a 34' Marine Trader.
Most suggestions I got were a 5K unit for the forward cabin and a 16K unit for the saloon and master. Unless you are freezing meat, that seems a bit excessive for a boat in the mid-Atlantic region.
My gut feeling was for a 12K in the main cabin with good ducting to the fore and aft cabins. Still haven't done it though so this is just theory.
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Up north or in the PNW that might work. But in the south you really need the correct amount of BTUs per room to cool a boat properly.
Also the problem with one unit cooling more than one cabin is in one cabin or the other you are not going to have thermostatic control over the room temperature.
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10-24-2016, 12:57 PM
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#14
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Senior Member
City: Kenosha, WI
Vessel Name: Tortuga
Vessel Model: Hershine 37
Join Date: Apr 2014
Posts: 253
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Quote:
Originally Posted by Capt.Bill11
Up north or in the PNW that might work. But in the south you really need the correct amount of BTUs per room to cool a boat properly.
Also the problem with one unit cooling more than one cabin is in one cabin or the other you are not going to have thermostatic control over the room temperature.
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True but you can balance the air flow with the flow adjuster in the y junction and with the vents. For me it works great and is quiet.
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10-24-2016, 12:58 PM
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#15
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Senior Member
City: Kenosha, WI
Vessel Name: Tortuga
Vessel Model: Hershine 37
Join Date: Apr 2014
Posts: 253
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Up north or in the PNW that might work. But in the south you really need the correct amount of BTUs per room to cool a boat properly.
Also the problem with one unit cooling more than one cabin is in one cabin or the other you are not going to have thermostatic control over the room temperature.
True but you can balance the air flow with the flow adjuster in the y junction and with the vents. For me it works great and is quiet.
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10-24-2016, 05:38 PM
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#16
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Guru
City: New Orleans
Vessel Name: Panache
Vessel Model: Viking 43 Double Cabin '76
Join Date: Mar 2011
Posts: 1,253
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I don't have a good feel for the capacity appropriate to Great Lakes conditions.
I've used Mermaid on a couple of boats and can't say enough good things about them - including service (long) after the sale.
Many TFrs (from a thread a while back) swear by Ocean Breeze.
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10-24-2016, 06:52 PM
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#17
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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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Sizing AC units is a big decision.
Whether in Florida or NJ, if it is 90 degrees outside and well up near or past 75 percent humidity and the emgine just got shut off....even 16K for a main salon full of windows isn't necessarily enough.'
Yes, by the time the engine cools and the sun gets lower....you can chill meat.....but in the meantime....do you want an AC that can do the job?...or have one working overtime just to keep up with being comfy?
Most people do not realize the home sized air conditioner for a nominal bedroom cant be compared to a marine equivalent. Lots of reasons such as air transfer, insulation, windows per cubic foot, etc...etc....
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03-18-2018, 10:36 PM
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#18
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Senior Member
City: Lutz
Join Date: Jan 2016
Posts: 473
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......and seawater temp!
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05-30-2018, 09:41 PM
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#19
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Senior Member
City: Lutz
Join Date: Jan 2016
Posts: 473
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I completed the installation of a Webasto 16k unit recently and it works fine. It went in under the port salon settee. Used a Y duct 5X4X4 with the 4inch ducts going fore and aft. The aft feeds both the salon and aft cabin thru the aft cabin closet with a with a fixed insulated shaft from atop the closet to the the underside of the shelf in the salon where a 30degree supply diffuser feeds the salon. The fixed exposed shaft has a 4"dia supply diffuser for the aft cabin. The other 4" duct runs thru the engine room below the electrical cabinet thru the front hanging locker and up to a 4" supply diffuser for the front cabin. All supply diffusers have dampers that can be shut to divert more supply to other areas. The 4x6 insulated fixed supply shaft is faced with 5/16 teak faced plywood and has 1/2 divinycell rigid insulation inside. Total cost was $1750 plus labor.
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05-30-2018, 09:55 PM
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#20
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Guru
City: Trenton
Join Date: Apr 2012
Posts: 1,521
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I'm going to jump in the pool with you. I am planning on installing the a/c unit in the saloon settee but the first one up by the refrigerator box. The duct would run under the port deck back to the aft cabin, up to the counter over the fridge and forward to the forward cabin. I had centered on 16K myself after trying a home unit.
__________________
Al Johnson
34' Marine Trader
"Angelina"
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