*This unit works like a charm. Keeps my rv 21 x 41 very **Fastly.Cool** . I recommend to anyone that wants to keep a rv cold without having to turn on the main a/c.*

Wow! Huge difference, which in my mind, is a bargain for the additional cost. I love the tech shows and how well you present what can be a complicated topic. Really impressed with no bloodied knuckles or French! Thanks!

Thank you for your very detailed video. Unfortunately, you have given me yet another project for my boat. When I first bought my boat, I had images of just sailing, entertaining friends, visiting exotic locations. Now I have fun things to do like add this air conditioner, upgrade my wiring to handle the new batteries I will need, etc.! Thanks for the video. Fair winds!

For me, the single most useful boat video on here. I aim to buy a boat in the next few years and for me AC and heating are a must. In fact I have decided I'm happier with a smaller monohull if I can kit it out with: water maker, hot water, heating, AC, a freezer and electric cooker. Murdock was the best!

This video is right on time. I'm about to buy a 56 Formosa and I will have to replace the old a/c unit. Talk about perfect timing. Thanks guys.

Love your videos- great job detailing the switch to a 12V HVAC system. We just finished installing a 16K BTU Marinair in our 34’ Fountaine Pajot power cat. Very pleased compared to the old Mermaid air I had. Features of the Marinair unit are similar to the Mabru (except runs on 110V AC). It has variable speed fan and auto setting. Also has humidity sensor. Cools the whole boat pretty fast. Price was $1900. Hard to beat that. We dont have solar. So we use a Honda 2K generator when on the hook. Not quite as nice as solar/Li battery set up. We have 4 100 amp AGM batteries - not enough to push the Marinair. We do mostly coastal cruising around Florida so system set up works for us for now. Maybe someday we finally go for solar/Li.

Thanks for the great tip on the A/C unit. I'll certainly be looking them up when I'm refitting my boat.

Yet another top notch episode. Thanks guys!

Excellent, cudos to Mabru for an excellent product!

Great video - really unbelievable amount of efficiency and the best part, it will actually be cool / warm the entire time you need it!

@TheOKellys

2 жыл бұрын

It’s amazing.

Awesome... I've always wondered if there was a bit more that could be done on the AC front.

Great review guys ! Thank you

great editing explaining something not so easyly presented. Loved it.

Another great video love the technology information that you guys provide.

Great video, thanks guys.

Great vid guys. Nice to get back to some sailing content. Really learnt something here too.

Amazing! Sharing this with my Sail friends!

I love coming here to learn. Great vid!

When you sell that behemoth of a generator it will offset the cost of the upgrade even more. Totally worthwhile upgrade. Well done.

Another great, instructive video. Thanks so much. You inspire confidence. I may well be looking to install AC before summer as it gets really hot in July/August in Greece!

...wasn´t expecting it to "come with an installer"...THAT WAS SO FUNNY!!!!!...thank you for your videos...always very instructive.

I'll never be able to afford one of the batteries shown near the start of this video, much less a boat to put it in, so why am I watching this video about replacing an expensive boat AC unit with an even more expensive AC (and 2 gauge copper runs, no less. Seriously, 2 gauge!) ? Well, aside from me being odd, it's because you two are always so cute together and seem so genuine and approachable. I guess it's the same reason people root for the underdog to prevail in sports, because where there are winners and losers you at least hope those that win are good people deserving of the win.

thx for the great vid ! happy sailing !

Getting boaring😉 with all these excellent shows, you set the bar at a new level each week, and always look for my o’kelley fix each week! Great find!

@TheOKellys

2 жыл бұрын

Awww, thanks Mark

I am impressed, well done ✨😊👍

Cheers guys

Love the: 'Mike Patey" move - HA! Only aviation geeks will get it!!!

@TheOKellys

2 жыл бұрын

Let’s get back to work! Lol

@Parr4theCourse

2 жыл бұрын

@@TheOKellys Ha, ha, ha!!!!!

@clausgiloi6036

2 жыл бұрын

Don't go ground looping Clarity :-)

@donjohnston3776

2 жыл бұрын

The catamaran world needs a Mike Patey

@Parr4theCourse

2 жыл бұрын

@@donjohnston3776 You got that right, just image the innovation that would come from him and his brother!!!

Absolutely AWESOME video!!! You killin it

@TheOKellys

2 жыл бұрын

Thanks Bill!

now you done it. cooling and heating. That is awesome.

@Total_Egal

2 жыл бұрын

pretty sure the cooling was the goal.. but the heating will come in realy handy some cold days and will help stay longer on the boat in the off season or between

Wow, what a difference!

Awesome video!

I used 12 volt fans and a damp towel on my live on sailboat during hot summer nights. The fresh water deck shower was very helpful.

Great info! Thanks

A very informative video...Thanks

Excellent video!!!

enjoy your warm night

Ooooh yeah: Love it when I have to pause your video because you just mention something new. Like a 12 Volt Air conditioner.

Sounds fantastic for off grid homesteading in Brandon Fl., combined with aircrete insulation and appropriate volume, P × V = n R ×T . Thank you for posting.

@genghischuan4886

2 жыл бұрын

lets go brandon

Great video! If I had a boat I would install it for sure! 👏🏻

Thank You!

Very informative, thanx

Very Interesting!

Great work Andre!

@TheOKellys

2 жыл бұрын

Da man!

@andrecormier3953

2 жыл бұрын

Thanks Phil!! Your work inspires us. Look forward to collaborating with you in the future.

Great upgrade. That thing looks like it’s 10 times the machine of the old one. Quality is worth the money not to mention the efficiency

@TheOKellys

2 жыл бұрын

Agree with you there!

Great video, love the Mike Patey reference!

A one-time cost of $3,200 for all-night cooling on batteries on a hot, sweaty summer? Sounds like a great investment, especially when you want to limit your diesel use!

@donjohnston3776

2 жыл бұрын

It costs more to talk about it than the money spent for sure. It doesn't pay to be cheap.

@eksine

2 жыл бұрын

$3200? he said it was $5300

@williamcrowley5506

Жыл бұрын

Worth every Penny

Mr. T was the MacGyver of the A Team Lol I frigging love watching you guys!!!

Brilliant!!! 👏

Always beneficial when you’re paying for quality. Copper is an unavoidable but retrievable cost. Sleeping comfortably is priceless

Thanks for posting this video. As I start in a refit of a 35-year-old trawler, I am looking for the latest technology for a 1400 Ah LiFePO4 battery bank. This is awesome as my wife and I always love our cool sleeping cabin but are looking to live off-grid as much as possible.

Great find and the extra expense up front pays off on the longevity side. Even in a house furnace, an ac fan will cost $300 per year to run where as a dc fan will cost $30 annually, again more expensive up front but over 25 years way cheaper. Well done.

@TheOKellys

2 жыл бұрын

Had no idea!

@deankoch7305

2 жыл бұрын

A ductless mini split is way better and way less money. They are so inexpensive you can afford to replace them every 2 years. A 21 sear 110volt uses 4 amps running and around 6 amps starting and under full load.

@MarkHerndon

2 жыл бұрын

@@TheOKellys I may be wrong on this but I suspect the difference is due to not having a transformer involved transformers are big time energy hogs.

Very cool, just started watching your videos. Thank you for sharing:-)

I enjoy your humor.

Thank you for the a.c. update. Glad to see 👀 this stuff working. So head south as fast as you can so you can use it. And give a report on how it is working. 👍 ok. Until next week Aloha from the Big Island 🏝 of Hawaii 🏝. P.S. where it is summer all the time ⏲

@TheOKellys

2 жыл бұрын

Oh man! We are ready!

Mike Patey motion! Awesome! Another DIYer!!

Great ac unit....the fact that it is also reverse cycle as well is awesome..!

@TheOKellys

2 жыл бұрын

Thank you! We need it right now it’s chilly in Virginia!

I got the Mike Patey reference. Forgot that Nick is a pilot. Flying cowboys are a great crew.

Great thumbnail, Nick and Megan! Received MORE OF YOUR COFFEE!!!!!! Life is good! Cheers,

@TheOKellys

2 жыл бұрын

Thank you! We got a new shipment on board today too whoop whoop! Thanks for ordering more coffee, it’s so good!

Great vid 👍 Need a shake up in the RV and camper market as well. Cheers

Thankyou 👍

What a cool video. It really was about being cool. No pun intended. Lol. It was a great video. What a great comparison of the ac units. Thanks 👍👍👍❤️

Actually, the modern day DC to DC converter or DC to AC inverter are both very power efficient from 95~98%. There are very little power loss during voltage conversion. The main reason that the new Mabru unit is much power efficient than your old unit is because it use variable frequency drive motor, so instead on/off, it basically just slow down. If you can fit the household AC (VFD type) on your boat, it will be quite efficient as well :)

Hello my dear friends, how are you both doing? Such a great video. I learned so much about ACs in a boat. It is so important for so many people. Thank you for the information. Wishing you a great trip out of Annapolis. Cheers from Canary Islands.

@TheOKellys

2 жыл бұрын

Hello Carlos, so great to hear from you! We are doing great and hope you are too!

Love your videos

I run into the same dilemma in the trucking industry. Thanks for the video.

Love the Patey fist pump! If you like boats, you probably like aircraft and great engineering.

In 2010, my new semi tractor came with an A/C unit hard-wired into a 'house set' of 4 batteries, the old tech, wet-cell type. They would run that a/c 10 hours, enough for a truck driver's required rest, meaning that in places like California, with their 'no-idling' law, the truck engine didn't have to run to power the main a/c. That little unit in the sleeper worked great and so my biggest reason for not wanting to go on the California runs went away. Almost forgot: the company supplying those a/c units was 'D/C Cool'.

@mogmogman5476

2 жыл бұрын

Also, your AC unit did not require marine water to be pumped up into the condenser intercooler which wastes more battery power. For less than 1/50th of the cost for the sail boat, we use wet cell batteries, a 24 VDC battery system and a single high efficiency inverter for our 5k btu AC unit that cost us $100. By the way our boat anchors in water so shallow that a water intercooler cannot be used.

@sharonbraselton4302

Жыл бұрын

ues slbg 8 hiyde soo gid en9ghh

@vroor32

Жыл бұрын

Q?: What brand of house batteries were those? Also, were they deep cycle?

Amazing improvement! Well done! I know battery technology has improved rapidly over recent years. Is this also the natural result from improved technology over the years or was this Mabru technology available back when the Dometic was new?

Love how that camera lens peeks in on your right! Lol!!

Love the thumb nail, kudos to the photographer!

@TheOKellys

2 жыл бұрын

Why thankya! The model did all the heavy lifting!

When it’s 90 degrees with 90 percent humidity at night and you are trying to sleep with fans in a small enclosed space 5300 dollars is NOTHING ! Being hot during the day while you are working or lounging about is one thing but a good nights sleep in a comfortable environment is priceless. ❤

"Mike Patey" back to work!! love it.

@TheOKellys

2 жыл бұрын

Back to work! That guy!

@FrankConforti

2 жыл бұрын

@@TheOKellys proof you are a genuine aviation enthusiast!

Great video. I did notice in the video you appeared to be recording the BTUs from very different locations. The old unit you seemed to be measuring 4 to 6 inches away from an exhaust. For the new unit it was being measured inside a sealed duct directly at the AC unit. But in the end if the power draw is lower and its sufficiently cooling your space, that's all that really matters.

@TheOKellys

2 жыл бұрын

Yeh plenty of errors, that’s why I said even if putting out full btu, it’s still half the efficiency in the dometic. But good eye!

@andrecormier3953

2 жыл бұрын

The probes were different . Anemometer in old AC shot the one in the duct of the mabru was a temperature probe measuring outlet temp.

Cheers.

I got into air conditioning and refrigeration in 1961, and over the years I have a lot of questions about the subject. A water cooled heat pump does not have to be defrosted so it is the most effcient while heating. Look up the Tesla valve; it so simple with no moving parts to wear out, and he got the design in a dream from God. The pride, and joy of his work was the Tesla turbine. If a Tesla turbine/pump pumped water vapor it would be the most efficent a/c in the world. Big brother doesn't want us to know that water is the best refrigerant there is for a/c systems. The higher amout of latent heat of evaporation in b.t.u. the more efficient. Water at 970.4 btu per pound wins the race. The head pressure of a/c systems is about 200 pounds. Water is 14.7 psi. Which would draw the most amps? In a lithium bromide absorbtion system the temperture is 40 degrees F water is the refrigerant. Just marry the Tesla pump to it.

@tomriley5790

2 жыл бұрын

Is there a problem with water freezing and expanding though?

@LoanwordEggcorn

2 жыл бұрын

Phase change cooling is efficient but water doesn't have favorable characteristics for that in a practical machine. It's not a government conspiracy that water isn't used for air conditioning; it's physics.

@gravelydon7072

2 жыл бұрын

@@LoanwordEggcorn Ice A/C works wonderfully. It used to be used on railroad cars. An example of how well it worked, take an 85'X10'X10' one in the Florida sun. Add 400 lbs of ice to start with. 90°F inside temp at the start and 15 minutes later it was at 75°. It kept it there for the next two hours. And it was good enough for US Presidents from 1942 to 1959. Local power company office building makes ice at night and uses it during the day. Saves them a batch of money.

@LoanwordEggcorn

2 жыл бұрын

@@gravelydon7072 How would that work in the middle of the ocean where there are no ice factories or power companies? P.S. The ice factories at that time used refrigeration like air conditioning to make the ice.

@gravelydon7072

2 жыл бұрын

@@LoanwordEggcorn Ships use keel coolers. It can get really cold from them as they can dump large amounts of heat into the water. We used them for cooling out engines at a number of locations. Ice houses used a different type of cooling. Theirs was like the old Servel unit, Ammonia Cycle. You heat it up to cool thing down. And in colder locations, they went out and cut ice in the winter on the lakes and then stored it till needed.

Good stuff nothin' like yanking out old outdated tech! Many RV's are moving to 12 volt fridge compressors to save on power and work well on batteries that are solar charged. That way you can get rid of propane.

Nice. As we get a little older we do like comfort

Mike Patey, Back to work reference, probably only fellow aviators would get this. Love it.

@TheOKellys

2 жыл бұрын

Glad you noticed. Now, back to work. Lol

Wow!

Amazing. I want one. Can’t afford one or justify one, but I WANT IT!!

Cool. I dropped a Velair 16k btu into my Monohull - which Gulf Nautical also sells. It's a great option.

Very impressive indeed. You will enjoy the cool without bugs and with NO ENERGY GUILT! Enjoy!

@TheOKellys

2 жыл бұрын

Thanks John, so true about the guilt and the morning check in on the damage 🤣

@johnkeegan6646

2 жыл бұрын

@@TheOKellys sad to disappoint thousands of no-see-ups, eh?

Love the Patey fist pump!

Yeah yo this gives such great videos that air conditioner is awesome

A heater too! Someone is getting lucky tonight!!

+1 for the Mike Patey reference.... Back to Work!!!

The Mike Patey move. I'm impressed I was just catching up on Scrappy progress. I wonder how many sailors are also pilots?

These are made and designed by a Chinese company called Hopewell. You can order one direct for about $1200. Used to be able to get them for less than $700 but the popularity caught up with them. The mabru markup is obscene and they are dishonest about their exclusivity, origin and "patent pending". I use a Chinese 12v mini split on my boat, slightly less efficient (older compressor, though I have seen units using the same boyard compressor recently) and it cost me $600 delivered.

@TheOKellys

2 жыл бұрын

Supply source for your info please

@nicolasmabru

2 жыл бұрын

Imitation is the best flattery. There is nothing dishonest about the way that we do business but there are plenty of misinformed people out there thinking that they can purchase a real Rolex in Chinatown.

@alexmiller8688

2 жыл бұрын

@@nicolasmabru so are you saying that you don't purchase your units from Hopewell? Where are they made?

Badass!

LETS GET BACK TO WORK!!! LOVE the nod to Mike Patey!! He is rocking the aircraft world! I do planes too! Sail boats, planes and motorcycles!

@TheOKellys

2 жыл бұрын

I got close to buying a Wilga in 2007, so when I came across Mike….the MAN!

Impressive aircon. Seems to be worth it. All I need is the boat :)

@TheOKellys

2 жыл бұрын

Get that boat Richard!

Love this! Also love Oregon! Never forget camping on Canon beach with four under five year olds……it’s where the seeds of sailing away were sewn. 😂

@stephaniemyatt8346

2 жыл бұрын

That last comment was a reply to another one of your videos…oops. Must say you both are so capable of giving good information!

@TheOKellys

2 жыл бұрын

Thank you. Cannon is one of our favorite places on this planet.

Aircooled new subscriber for ya folks.

I'm already subscribed, but Megan really reeled me in on this video with her sultry cover shot.

You referred to putting in BTU’s. That is the measurement of heat and is equal to about a match. The definition of refrigeration is the removal of those btus which is taken out by condensing which I would say is likely a water loop under your boat. Water is the best way for the transfer

Great video as always and in this case bonus points for the use of a cinematic McGuffin :-)

@TheOKellys

2 жыл бұрын

And points to you for using McGuffin!

@RayDCO

2 жыл бұрын

@@TheOKellys LOL

Back to work NICK!!

Must show to Billy! Maybe he will finally agree to get one 😂

@TheOKellys

2 жыл бұрын

Don’t tell him it weighs 40lbs. :) but worth every ounce on a hot night

Really enjoy your vids. Tons of info. Thanks. My wife and I have always dreamed of life on a sailboat. Before we jump all in we would love to spend some time with someone on the water for a week at least to get a hands on experience. Do you know of anyone you could recommend that charters in the carribean.

good vid and timely - see you installed ReLion batteries - I am a big fan of relion based on my research but rarely see on youtube boats. bravo on choice. Also shopping for AC , boat IM buying (4 yr old mono) has AC problems and draws more power than Vegas at Christmas.will def look at your AC vendor

@TheOKellys

2 жыл бұрын

We bought those Relions four years. They work just fine, but there are better deals out there now from other manufacturers.