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Thinking out of the box for new/replacement motoryacht air conditioning systems
January 27, 2012
9:05 pm
davidwigler
Knoxville, TN
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Thanks, Steve, please let us know as you get some experience with the MarinAire units.  I do like some of the features and the price.

1977 Hatteras 58' Motoryacht, galley up model with 4 staterooms

5 reverse cycle Cruisair compressors in the starboard engine room with SMXII controllers.  One self contained unit for the enclosed aft deck.  Total 87K btu

January 27, 2012
7:52 am
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Steve Pooler
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David...Links below for your review:

 

MarinAire installation & control operation:

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Dometic Turbo (Marine Air version) 

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Dometic Marine Airrr Passport I/O control operation:

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Dometic Cruisair SMXir (Remote Control Available) operation:

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Questions as always I'm happy to try to answer  Cool

Steve~

January 27, 2012
7:13 am
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Steve Pooler
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Short or long description ?  Wink

Short…Quality, Warranty, & Servicing network…

But to be honest & fair…I have yet to sell a MarinAire (Just picked them up week after Xmas) so I have not seen one myself…

They do have some nice features that Dometic does not offer such as: Built in refrigerant gauges, standard sound shield, remote control standard, and actual humidity sensing...

Dometic units are built in the US and the Turbo unit is the best performing unit I have seen though & I'm not sure in your application (with 2 units in the salon) how the MarinAire remote control/s would handle that since they display the actual control's settings...May also be a problem setting them up to run in stages if the control wants to set both at the same setting...I'll check into that with them & get back to you...They may allow for different remote channels... 

 

Steve~

January 27, 2012
7:01 am
davidwigler
Knoxville, TN
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What is the difference (besides price) between the Stowaway units and these:

 

** you don't have permission to see this link **

1977 Hatteras 58' Motoryacht, galley up model with 4 staterooms

5 reverse cycle Cruisair compressors in the starboard engine room with SMXII controllers.  One self contained unit for the enclosed aft deck.  Total 87K btu

January 22, 2012
9:46 am
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Steve Pooler
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David~

Gulfstar & Viking did as you suggest years ago…With not much success…

The boat would need to be much larger than what a typical 58' MY has in space for that ductwork…Remember you need return from each cabin too...

Small duct makes a lot of air noise when moving that kind of CFM…

The Gulfstars & Vikings sounded like you were in a Hurricane.

You also loose the individual temp control for each cabin, and the option to power manage…

 

Steve~

January 22, 2012
9:32 am
davidwigler
Knoxville, TN
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I live aboard year-round with cold winters and hot summers, so power bills are a consideration.

 

I currently have an R22 Crusair split system with seven 35-year-old air handlers and 5 condensers relaced in the late '90s, served by a large seawater pump and manifold/relay.  The system works great when fully charged, but the salon and master stateroom units lose their charge in 1-2 months.  I'm tired of limping along with $250 service calls to charge these units.

 

Thanks to Steve, I now understand the chilled water systems are too expensive. 

 

It doesn't make sense to me to replace leaking air handlers right now with old R22/417 technology, and run the risk or probability of new leaks or other problems in the lines or condenser.  Replacing air handlers and condensers with the new more efficient Emerald 410a split system is not a diy project for me which makes it very expensive.

 

This caused me to look at replacing the leaking units one at a time with self contained units.  I could do this myself to save a small fortune.  But that would leave only three small condensers in the engine room with a large high-amp seawater pump, until they need replacement.  One of the staterooms will be very difficult to serve with a self contained unit.  And there is something nagging at me about converting a classic old motoryacht to smaller boat technology. 

 

It is surprising how little price difference there is between small and large self contained units.  With a little duct work, ...

 

Hmmm, duct work.  What if the whole boat could be ducted with a high pressure air handler, or perhaps one for the upper level and another for the lower level.  Something like this:

 

** you don't have permission to see this link **

 

Any ideas?14

1977 Hatteras 58' Motoryacht, galley up model with 4 staterooms

5 reverse cycle Cruisair compressors in the starboard engine room with SMXII controllers.  One self contained unit for the enclosed aft deck.  Total 87K btu