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Old 09-04-2013, 08:21 PM   #1
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ac unit size

What size unit is recommended for a 31 footer fith wheel 115 single pole
1300? or 1500 BTU

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Old 09-04-2013, 08:30 PM   #2
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In our 41' MH we have two 13.5 heat pumps. As to what you need it'll depend on how well the unit is insulated and where will it be used. We run both heat pumps at the same time off a 30 amp circuit.
Less insulation in high temp areas will require more cooling than a well insulated unit in lower temps.

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Old 09-04-2013, 08:52 PM   #3
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15,000 BTU. Same power requirements as any other AC unit.
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Old 09-05-2013, 10:23 AM   #4
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I live in a 38 footer with 3 slides, they put in two 13,500's. I replaced one due to bad workmanship failure and I put in a 15,000, it's not enough on a hot day on a 30 amp site.

NOTE both the older oem 13,500 and the new 15,00 draw the same 13.5 amps.
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Old 09-05-2013, 12:00 PM   #5
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Originally Posted by jesilvas View Post
15,000 BTU. Same power requirements as any other AC unit.
Not all AC 9,600, 11,000, 13,500 or 15K run on the same AMP's.
Not all 13.5K AC run on the same AMPS.
Coleman has some Power Saver one that require less AMP's

They can varie from 9 AMP to 15 AMP required
You are right that they do run on 108-132 Volts.

I would put a 15K heat pump in a 31'.
Then try to stay out of over 90 in the sun.
Other wise a 15K heat pump and a 9-11K power saver.

My 34' came with a 11K & 13.5K PS units.
It now has 2 13.5K PS units.
Next month it will have 1 13.5K PS and a 15K heat pump.
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Old 09-05-2013, 02:29 PM   #6
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They both require a 20A breaker max is what I mean to say.

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