laknox
Arizona
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What are the basic differences between the two AC units? Does the 15k have more airflow or just more cooling capacity? On a single AC rig with a 13.5k unit, is is possible to replace the single with a 15k unit with no modifications or would it have to be re-wired with heavier wires and/or bigger ducting?
Lyle
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tvman44
Southwest Louisiana
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Plug and play, for 10% more cooling capacity.
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skipnchar
Topeka or somewhere else
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Colder air is produced by the larger unit. Volume of air is more a matter of the fan strength and design.
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Polishnurse
Schodack, NY
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You find the larger unit will most likely produce more air, but that difference is in the total amount of latent heat the unit will remove.(more cooling). They will both fit in the same hole. What might want to consider - how good of a job the 13K did. The 15K will have less run time because it is cooling quicker. It is also removing more moisture from the space. Less run time means less mositure removed. 90% of the work on AC is removing the Moisture. Once the mositure is removed, then the unit can realy begin to work for you.
Thats why they tell you to keep your doors and windows closed.
On a side note you be using more power to run the larger unit. Depending on your location and the outside temp. The larger unit would be the better choice knowing how hot RV's can be.
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ScottG
Bothell Wa.
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No changes to wiring or anything else is required, just install in place of smaller unit.
Looking at PDF's for both AC's the biggest difference I noted was a larger compressor.
If I ever have the choice, I will go for the 15K.
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laknox
Arizona
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Thanks for the info, guys.
Lyle
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C Schomer
Buckeye, Az.
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My 98 5er has a dometic 15k. It makes REALLY cold air (29 degrees DT) but it would be a LOT more efficient and produce more btus if the coil and blower were bigger and get that crazy high DT down so it could work on the sensible load more and less on the latent load. The government really beat up the residential AC industry and that's the reason we have SO much more efficient home ACs than we used to have. I hope they beat up the RV AC industry some day! Or maybe they already have. I'd shop for the highest seer. The gov't made sure the residential industry has a level playing field I.A.W. seer ratings. That's the kind of control we need on the RV industry. I bet the RV btu ratings are gross and not net. It would be great if we could see the NET btus. Low airflow and small coils kills NRE - net refrigeration effect. Craig
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laknox
Arizona
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C Schomer wrote:My 98 5er has a dometic 15k. It makes REALLY cold air (29 degrees DT) but it would be a LOT more efficient and produce more btus if the coil and blower were bigger and get that crazy high DT down so it could work on the sensible load more and less on the latent load. The government really beat up the residential AC industry and that's the reason we have SO much more efficient home ACs than we used to have. I hope they beat up the RV AC industry some day! Or maybe they already have. I'd shop for the highest seer. The gov't made sure the residential industry has a level playing field I.A.W. seer ratings. That's the kind of control we need on the RV industry. I bet the RV btu ratings are gross and not net. It would be great if we could see the NET btus. Low airflow and small coils kills NRE - net refrigeration effect. Craig
RV industry =regulated=?! Surely (stop calling me Shirley) you must be joking!
Lyle
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fla-gypsy
North Florida
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The difference? about 1500 BTU's of cooling power. Not a lot but it can help
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JohnBoyToo
DFW, Tx
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I was wondering when someone would answer 1.5k 
Are you changing one out or getting new ?
If a change - imho, not worth the diff? depends on your situation .
but if buying without replacing - more is better !
as long as it is not oversized for the area cooled.
and PLEASE keep the gooberment out of anything to do with RV's !
It's still enjoyable as is...the new trucks have TOO much epa in them now
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