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Old 11-14-2018, 07:54 AM   #1
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One 15k AC vs two 11k ACs

I've been looking at the Entegra Coach Esteem because it has two ACs vs the normal one on a class C.


After some more inspection I see that the ACs on the Esteem are 11k instead of the 15k offered on the other Class Cs.


So - I can do the math and see that 22k is better than 15k... also, having two ACs in case one breaks / fails would be better.


But - if I see something I really want in an RV that only has one AC (such as a washer/dryer) would it be worth giving up the additional 7k of AC power?


I am only considering because originally I thought it was two 15k ACs and DOUBLE the cooling power... now it is only 30-40% more cooling.
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Old 11-14-2018, 09:07 AM   #2
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I would take two A/C units over one. Iím considering adding a second to mine because it doesnít cool as well as I think it should (32í Class A, one 15k unit). If the layout is really what you want, you can look into a second unit.
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Old 11-14-2018, 09:46 AM   #3
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We have had 28' with one unit. 37' with two units. And now 40' with 3 units. More is much better.
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Old 11-14-2018, 12:56 PM   #4
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One 15k AC vs two 11k ACs

If you want to run 2 ACs simultaneously you will need to be a 50 amp coach not a 30 amp. We had 2 ACs on our old class a that was 30 amp and did not have the power to run them together at once.
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Old 11-14-2018, 01:16 PM   #5
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Looks like the coleman power saver 11000 btu units draw about 10 amps. In theory you could run two, [if started separately] on 30 amps, but could not run a microwave at the same time. If you have 50 amp service no problem.
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Old 11-14-2018, 03:16 PM   #6
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Quote:
Originally Posted by mikeh2obury View Post
If you want to run 2 ACs simultaneously you will need to be a 50 amp coach not a 30 amp. We had 2 ACs on our old class a that was 30 amp and did not have the power to run them together at once.

The Entegra Coach Esteem Class C has a power management feature they show off in some youtube videos. They explain that if both ACs are running and someone starts the microwave or a hair dryer it will temporarily shift power to that item and away from the AC unit instead of tripping breakers. Then, when that temp power draw is done the AC will go back to full power.
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Old 11-14-2018, 03:37 PM   #7
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Quote:
Originally Posted by mikeh2obury View Post
If you want to run 2 ACs simultaneously you will need to be a 50 amp coach not a 30 amp. We had 2 ACs on our old class a that was 30 amp and did not have the power to run them together at once.
This is simply not true on the coach the OP is asking about. Along with what wscentral mentions above, I believe the EMS will only allow one a/c to start at a time so the start up amps is within the available limit.
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Old 11-14-2018, 04:01 PM   #8
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I wouldn't let the current AC configuration be a major factor.

A friend recently bought a nice class C and had an additional AC unit mounted over the bedroom. He uses a heavy duty cord to hook this straight to the pedestal if he needs it.
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Old 11-15-2018, 11:43 PM   #9
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We live in so texas, and it's hot her in summer we have a 31ft class c with no double pane windows, I am not a big fan of ducted roof ac but that's all you get now days, with that being said 1 15 k unit is marginal in 103 degree heat for a 31ft coach, the heat gain on roof ductwork is tremendous in direct sunlight found that I had gaps in the forward ducts, installed a airtex chillcrill and eliminated the front ducts, gained about 4 degrees daytime temp decrease,night is no issue with one 15k unit, it's just the daytime running that bites you
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Old 11-17-2018, 07:56 AM   #10
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Quote:
Originally Posted by okcnewbie View Post
I wouldn't let the current AC configuration be a major factor.

A friend recently bought a nice class C and had an additional AC unit mounted over the bedroom. He uses a heavy duty cord to hook this straight to the pedestal if he needs it.
This is what I did to a previous Class C.
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Old 11-17-2018, 07:53 PM   #11
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On my last trip I met a guy in the park who had an Esteem. It was new to him and he didn't understand it. Electrically, it's a clone of my Jayco 31FS with the two 11 Btu air conditioners. You can run both air conditioners and the microwave at the same time on 30 amps. Each AC unit draws 9.5 amps for a total of 19 amps. The microwave is 900 watts for 7.5 amps. Total amperage is 26.5 amps with room to spare for the led lighting etc. I have had the rig in over 100 degree temps and the ducted air is fine. I wouldn't start everything at once, but the rig is design'ed to handle the electrical load just fine. An important point is there is no electrical water heater and the frig draws very little. There is an industry rule that any rig 27 foot and over needs two air conditioners. I think that's very valid from the experience of many on the forum.
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Old 11-17-2018, 09:58 PM   #12
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I agree with kraken anything over 27 ft needs 2 11k units, like I said in previous posts 1 15 k unit is marginal at best,with ducted due to roof heat gain or rears its ugly head at 103+ temps in so texas. Night time is no issue
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