New A/C verses older ones.

[waybomb]

You might look at Webasto as well. I installed one under the first bed. It is very quiet. I'm guessing all brands today are just a quiet since the use scroll compressors these days.

[Alanna Mo Cree]

I was just discussing the boat A/C with my house A/C guy last week when I had to have one of my air handler motors replaced. I lamented the 95 degree water temperature being too high for the A/C to work well and he made what seemed like a good point. The house A/C works fine when it is over 100 degrees air temp, and water is way more dense. His thinking was that 95 degree water temp should still work much better than 100 degree air temp.

One thing I'm definitely considering when the time comes is going with more BTUs. Today's units are a bit smaller for the same BTU output. Here in Florida with the sun beating down the 12k BTU stateroom unit has trouble keeping up. It looks like I can fit at least a 14k BTU unit in the available space. I don't know if 2k BTU will make much difference, but every little bit helps (at least that's my thinking).

[Merkinbrumsky]

QR_BBPOST

Are these available for purchase in Canada? The marinaire site does not have Canada as a selectable choice for shipping. My older 10,000 btu dometic unit is on the way out and needs replacing. Defender Canada site has the dometic for about $3250 can + hst. The marinaire unit is a little easier on the wallet.

Not sure, I would give them a call to see the possibilities. I had mine sent to to my brothers house in NH. He comes up and I go down so it's not and issue transporting it up.

FWIW I called marinaire today and they don’t ship to Canada so you would have to ship to a US address and go pick it up if you are a Canuck.

[tomschauer]

QR_BBPOST I was just discussing the boat A/C with my house A/C guy last week when I had to have one of my air handler motors replaced. I lamented the 95 degree water temperature being too high for the A/C to work well and he made what seemed like a good point. The house A/C works fine when it is over 100 degrees air temp, and water is way more dense. His thinking was that 95 degree water temp should still work much better than 100 degree air temp.

One thing I'm definitely considering when the time comes is going with more BTUs. Today's units are a bit smaller for the same BTU output. Here in Florida with the sun beating down the 12k BTU stateroom unit has trouble keeping up. It looks like I can fit at least a 14k BTU unit in the available space. I don't know if 2k BTU will make much difference, but every little bit helps (at least that's my thinking).

If you look at the specs for any particular unit, it will show Heating / Cooling output btu @ xx inlet temps.
Below is from a marine air unit.

) BTU and electrical data are based on a 45 degreeF/7.2degreeC evaporator and 100 degree F/37.8 degree C condenser in cool mode, and a 45 F/7.2 C evaporator and 130 degree F/54.4 degree C condenser in heat.
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In cool mode if the inlet water temp is less than spec, you should get a bit more output and a bit less power consumption.

Something else to consider is I do not see any new marine units that do not use R410A. R410A is being phased out starting Jan1 2025. If you do not need a unit now, I would consider waiting for new units to be available.

[Viper]

++++1

[km1125]

QR_BBPOST

QR_BBPOST I was just discussing the boat A/C with my house A/C guy last week when I had to have one of my air handler motors replaced. I lamented the 95 degree water temperature being too high for the A/C to work well and he made what seemed like a good point. The house A/C works fine when it is over 100 degrees air temp, and water is way more dense. His thinking was that 95 degree water temp should still work much better than 100 degree air temp.

One thing I'm definitely considering when the time comes is going with more BTUs. Today's units are a bit smaller for the same BTU output. Here in Florida with the sun beating down the 12k BTU stateroom unit has trouble keeping up. It looks like I can fit at least a 14k BTU unit in the available space. I don't know if 2k BTU will make much difference, but every little bit helps (at least that's my thinking).

If you look at the specs for any particular unit, it will show Heating / Cooling output btu @ xx inlet temps.
Below is from a marine air unit.

) BTU and electrical data are based on a 45 degreeF/7.2degreeC evaporator and 100 degree F/37.8 degree C condenser in cool mode, and a 45 F/7.2 C evaporator and 130 degree F/54.4 degree C condenser in heat.
[/
In cool mode if the inlet water temp is less than spec, you should get a bit more output and a bit less power consumption.

Something else to consider is I do not see any new marine units that do not use R410A. R410A is being phased out starting Jan1 2025. If you do not need a unit now, I would consider waiting for new units to be available.

This could work to your advantage on pricing though. If they have 410 units in stock they won't be able to sell after Jan 1, so they might give a great discount to get them out the door. OTOH, if you wait and buy one of the new units, they'll likely be MORE expensive and do you really want a first gen of the new technology being sold?

They'll still be able to service the 410 units for quite some time, so I would not be concerned about that.