F44 Needs New AC Unit-Advice on Size and Brand?

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Lean Wolf
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F44 Needs New AC Unit-Advice on Size and Brand?

Post by Lean Wolf »

I need to install a new salon AC unit in my 1979 F44. The one in there is a Polar Bay 16000 BTU (piece of junk) that has not worked properly since it was installed 8 years ago. I am thinking of installing a 24000 BTU unit and am considering a Cruiseair or Webasto. The Webasto is a lot cheaper but I have heard that the compressor's are not as well built and I plan on keeping the boat long term. I have read about not putting too large of a BTU unit in the boat due to increased humidity. My sense is that the boat is big enough (even with a seperate well working Cruiseair in the aft/fwd cabins) to run 24000 BTU's in the salon. Has anyone had any experience with this? Any thoughts on size and brand? Appreciate the advice...
Drew
Drew
1979 Trojan F44, Detroit 6-71's
Chopped 47 Ford, 460 CI

JB
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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by JB »

My 1976 F44 has an original Crisair 16 or 18000 BTU which still works flawlessly

I am in the HVAC business and I REALLY think 24000 is too big
JB
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Peacock
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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by Peacock »

Our 1977 F44 has the 2 Cruisair units-each 16000 BTU. The compressors in the engine room are not original but don't know their age. Both recently checked out fine. The air handlers (I think thats what they're called) in the salon and both staterooms are rather loud, esp the one in the salon. Here in mid-south Florida, we have found this size to work well. We don't really use the reverse heat; besides, the admiral is cold-blooded and she likes the the Chromalox electric wall heaters better.
Larry
1977 F44 Motor Yacht 6-71N

rickalan35
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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by rickalan35 »

Hi Lean Wolf,

I can recommend Flagship (Florida firm) as a company to consider. I purchased two new units from Flagship this summer and installed them in my Tricabin. I measured the cubic footage and chatted with the people at Flagship. They recommended a 12,500 for the aft cabin and 16,500 btu unit for the salon. I purchased the particular units that also included heat. They work flawlessly. They sell kits for complete installation.

Best of Luck

Rick
Trojan 1994 370 Express, 502 Bluewaters

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prowlersfish
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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by prowlersfish »

24000 seems large . Do you have 50 amp 240v or twin 30amp (120) shore power ?
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Lean Wolf
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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by Lean Wolf »

I have 50 amp shore power.
Drew
1979 Trojan F44, Detroit 6-71's
Chopped 47 Ford, 460 CI

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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by Jerry »

I don't believe, unless you have a 240v system, that you can even run a 24,000 btu unit.
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prowlersfish
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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by prowlersfish »

X2

Thats why I asked about 50 amp 240v vs twin 30 120v

Just for reference , 50 amp 240 volts gives you 12000 watts of power twin 30 120v gives you 7200 watts (single 30 would be 3600 watts )
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Life is to short for a ugly boat :D

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g36
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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by g36 »

dont know bout what size you need but i will reccomend mermaid manufacturing ac units, their tech support people can help with sizing
they have a 5 year warranty and are built with no special circuit boards etc so any ac person could work on them if needed.(out of warranty of course) i have installed 3 now. 1 on my f32 when i had it and 2 in my carver 405. i spent alot of time researching and have not been disappointed with them. if interested i can suggest the website i ordered from if you pm me
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prowlersfish
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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by prowlersfish »

One question we all for got to ask . Is the system you replacing a self contained or do you have remote air handlers ( evaporators) ? If you have remote air handlers then you need to stay with the size that the system was set up for. If you when up in BTUs then you would have to add or change air handlers
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77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D

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Re: F44 Needs New AC Unit-Advice on Size and Brand?

Post by larryeddington »

I too was in the HVAC business (not marine but same principles) You definitely do not want to over AC an area as you wind up with a cold clammy humid result, aside from cooling an AC also dehumidifies the air. Drier air will feel cooler to humans. Not sure where you could get information to do a proper heat load analysis similar to the old "Schedule J" used in land based structures.

On the subject of compressors, very good chance both brands may use the same compressor. There are just a few manufacturers of compressors. More important matters are the controls and proper sizing.

Another avenue is working on ways to insulate the area, not easy in our boats.

Good luck.
Larry Eddington
1984 F-36 Tri Cabin "The Phoenix II"
1978 F-28 "The Phoenix"
Fish Master 2350 Bay Boat
9.5' Dink

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