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Old 06-09-2016, 08:53 PM   #1
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Self Contained Reverse Cycle Air Conditioning Change Out

It's time to replace one of our AC/Heat units and I'm looking for product recommendations or warnings of problem brands. We need to replace a 24,000 BTU 220V unit and want the most energy efficient quietest unit that is reliable. Any brand user pros or cons would be welcome!
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Old 06-09-2016, 09:22 PM   #2
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It's time to replace one of our AC/Heat units and I'm looking for product recommendations or warnings of problem brands. We need to replace a 24,000 BTU 220V unit and want the most energy efficient quietest unit that is reliable. Any brand user pros or cons would be welcome!
efficient go for inverter technology this is super nice and now using from long time on building air conditioning so we have good return now.

Frigomar make it but sure you can find other brand

Inverter BLDC - SELF CONTAINED UNIT
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Old 06-09-2016, 09:37 PM   #3
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Flagship Marine. Conventional reverse cycle air conditioning but the heat side is straight electric furnace. The unit is much more heavily built that the usual suspects. I just sold a boat with a 20 year old (problem free) Flagship system and promptly installed one in my new boat.
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Old 06-10-2016, 05:26 AM   #4
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Mitsubishi Mini Split

Efficient , VERY efficient at heat ,multiple zones if desired and no seawater required.
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Old 06-10-2016, 06:33 AM   #5
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efficient go for inverter technology this is super nice and now using from long time on building air conditioning so we have good return now.



Frigomar make it but sure you can find other brand



Inverter BLDC - SELF CONTAINED UNIT

I was not aware of this approach to HVAC. Very interesting. A quick Google search did not yield other brands.... I sent an email to Frigomar to see if they sell into US.
Thanks for info!
Norm
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Old 06-10-2016, 06:40 AM   #6
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Flagship Marine. Conventional reverse cycle air conditioning but the heat side is straight electric furnace. The unit is much more heavily built that the usual suspects. I just sold a boat with a 20 year old (problem free) Flagship system and promptly installed one in my new boat.

Flagship looks to be very well built but I don't know about using straight electric on the heat side. The 24k unit uses 4 kW for heat and 20 amps (ouch). Does have the advantage of no need for warm water to heat so can be used in winter with very cold water although that use is unlikely for me. We do use the heat side occasionally to warm the boat after a cool night to extend our season. The 20 amp draw is a limiting factor...

Thanks
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Old 06-10-2016, 06:43 AM   #7
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Mitsubishi Mini Split

Efficient , VERY efficient at heat ,multiple zones if desired and no seawater required.

I can see how the mini split system could be good in some boat applications but for us the outside unit is a show stopper given we have 3 units on our boat and don't want the noise and hot air exhaust on deck.
Thanks
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Old 06-10-2016, 07:52 AM   #8
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Norm, I would be looking at split units from Cruisair. The compressor and condenser where they belong in your big engine room. We have a Cruisair split unit 16,000 BTU that was on our Manatee when we bought it 8 years ago and looks to be maybe 1990 vintage still cooling and heating. We also had a Cruisair 16,000 BTU package unit added last year with the compressor sound enclosure added that is very quiet and compact.
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Old 06-10-2016, 09:21 AM   #9
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"3 units on our boat and don't want the noise and hot air exhaust on deck."

In Europe they simply bolt them to the aft rail.

The Heat output is 3x to 5x what a toaster wire produces per KW.
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Old 06-10-2016, 09:40 AM   #10
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Flagship Marine. Conventional reverse cycle air conditioning but the heat side is straight electric furnace. The unit is much more heavily built that the usual suspects. I just sold a boat with a 20 year old (problem free) Flagship system and promptly installed one in my new boat.
How is it reverse cycle if the heat is straight electric furnace?
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Old 06-10-2016, 12:26 PM   #11
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Norm,

We installed Webasto FCF units during our refit. Prices were great, and no complaints to date. Came with wireless remote controls which we don't use. We ran these heavily as liveaboards for one very cold winter and the usual hot and humid summer in Baltimore. Since we left on our extended Caribbean cruise, they are not being used nearly as much, so can't report long term info.
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Old 06-10-2016, 12:32 PM   #12
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"3 units on our boat and don't want the noise and hot air exhaust on deck."

In Europe they simply bolt them to the aft rail.
That's interesting. Do you have any pictures of that?

How do the run the power and gas lines into the boat?
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Old 06-10-2016, 06:32 PM   #13
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That's interesting. Do you have any pictures of that?

How do the run the power and gas lines into the boat?
Oh just drape them along the rails with the carnival lights.

They must look like crap, sorry considering as they are not made for direct salt spray and look like Sanford and Son rejects bolted on to the back rails of a boat and cost near the same as a boat AC does (I have one cooling my garage/shop) no thanks. I don't care that some blokes in EU have no concern for looks, I do.
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Old 06-10-2016, 08:54 PM   #14
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Hijack warning.

Air conditioning for almost free. This guy is a genius.

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Old 06-10-2016, 09:02 PM   #15
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Originally Posted by Spottsville View Post
I was not aware of this approach to HVAC. Very interesting. A quick Google search did not yield other brands.... I sent an email to Frigomar to see if they sell into US.
Thanks for info!
Norm
we install all ready 3 unit this is totally incredible technology, inverter start slowly the compressor no big A to start like old model

soon I can I'm going to change my chiller by inverter technology to run AC on solar panel.

Hugues
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Old 06-10-2016, 10:14 PM   #16
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Saw the frigiomar chillers at the Miami boat show and I planned on adding one for underway use only off our house bank. Unfortunately the local distributor wasn't able to get one done on my schedule. Probably buy the unit and install it myself next year as I have already cleared space for it.

If you aren't looking for the new vfd high efficiency tech then the flagship marine gear is tough to beat as well.


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Old 06-11-2016, 06:05 AM   #17
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"I don't care that some blokes in EU have no concern for looks, I do."

That their dockside cost of electric is 3X to 5X what ours is might make them less concerned with the "Look".

This inverter tech IS the wave of the future ,when the boat assemblers learn to build it in , we will all delight in less power use, from the dock or the noisemaker.
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Old 06-11-2016, 06:21 AM   #18
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How is it reverse cycle if the heat is straight electric furnace?
The air conditioning side is reverse cycle. i.e. exchanges heat through the water.
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Old 06-11-2016, 07:25 AM   #19
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Oh just drape them along the rails with the carnival lights.

They must look like crap, sorry considering as they are not made for direct salt spray and look like Sanford and Son rejects bolted on to the back rails of a boat and cost near the same as a boat AC does (I have one cooling my garage/shop) no thanks. I don't care that some blokes in EU have no concern for looks, I do.
Of course you do Scottie, you have a beautiful boat.
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Old 06-11-2016, 07:40 AM   #20
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Most water sourced reverse cycle heat fails to work when the water is about 40F.

The source water with heat removed freezes ,so a heater element is required .

Few folks get to 40F water so the inefficiency of the reverse cycle units is accepted.

Especially at a marina with "free " electric.

In the deep south most air cond is just air cond with no reverse cycle plumbing.

This is because the added plumbing reduces the air cond efficiency (which may be a 9 or 10 month requirement) enough that heating only a small percentage of the time is cheaper with a heat strip on a year long basis.
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