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Old 09-21-2011, 11:05 PM   #1
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12 volt fan for the bedroom

I was wanting to put a table top fan in the bedroom of the TT. I will assume a normal house fan (110 volt wall plug) will not be able to operate off 12 volt battery power. I dont own a fan so i cant try this at the moment. Anyways, we like to go boon-docking but dont want to have to run the generator all night to have occasional Air Conditioning kick on and off all night, when its not that hot. So i want to put a small fan that will run off 12 volt battery power. There is no point of running the Generator just to run the fan, might as well run the Air Conditioning if im running gen. The only 12 volt table top fans i have found have a cig lighter plug.
Any recommendations on how to solve this problem? I was thinking i could run a power/ground wire from battery to built in night stand, cut a hole and put some kind of Cig lighter in the hole, so i could plug the fan into that.....Not sure. Just wondering if anyone else has done a similar mod, or if this idea is dumb. Thanx for any help!
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Old 09-21-2011, 11:44 PM   #2
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get a little converter to run a 110v fan
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Old 09-21-2011, 11:47 PM   #3
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Be sure your battery can power the fan overnight without totally discharging the battery(s). An inverter may be a good idea BUT....you'll lose efficiency using an inverter and additionally tax your battery(s).
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Old 09-21-2011, 11:50 PM   #4
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Where or what would I even hook a converter up to in my bedroom? I have 2 batteries and have ran the bathroom exhaust fan (which uses 12volt) for 2 days straight off batt with no prob
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Old 09-21-2011, 11:56 PM   #5
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Where would I even hook a converter up to? I have 2 batteries and have ran the bathroom exhaust fan for 2 days straight with no prob
Inverter not CONverter. The difference is a converter converts 120volt AC current to 12 volt DC.........an inverter uses 12 volt DC and provides 120 volt AC. So, an inverter is what you could use while boondocking. Teh inverter would connect to your battery bank and then you could run 120 volt AC wiring to a receptacle and then plug in a house type fan.
Sounds like you have a battery bank that will power your bedroom fan.

Another thought......if you have a roof vent over the bed maybe you could put a fan in the square vent "hole". Fantastic Vent Co, has models that would fit in the standard 14" square opening.
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Old 09-22-2011, 12:03 AM   #6
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What's all involved with installing an inverter? I have never messed with one of those
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Old 09-22-2011, 12:34 AM   #7
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What's all involved with installing an inverter? I have never messed with one of those
It can be involved or not depending on what you want and how much you want to spend. Good PSW (Pure Sine Wave) inverters can cost $2,000, a MSW (Modified Sine Wave) ones can go for $1,000. Then you need to upgrade the batteries and rewire the RV.
For a fan I'd just go to Harbor Freight and get a small one for $20 or so, plug it in to your 12 volt and plug the fan into it.
They also make 12 V fans, we have a couple, one is a small black oscillating one and the other is a Breeze small box fan from Fantastic Vent (makers of the Fantastic Fan units)
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Old 09-22-2011, 12:38 AM   #8
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Where do you plug the 12 volt fan into?
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Old 09-22-2011, 01:44 AM   #9
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Where or what would I even hook a converter up to in my bedroom? I have 2 batteries and have ran the bathroom exhaust fan (which uses 12volt) for 2 days straight off batt with no prob
I added a 12 volt outlet next to a light switch on the wall. Just drilled a hole in the wall next to the switch, found the hot side with a tester and wired the socket with wire left over from another project. Bought a good quality socket from a boat place online.

This link will help

RV Electric
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Old 09-22-2011, 02:37 AM   #10
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Check in your closets, behind drawers and you will probably find 12 volt wiring get a cig lighter plug from Pep Boys and contact Fantastic Vent for there portable fan.

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Old 09-22-2011, 09:05 AM   #11
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To wire in an inexpensive inverter simply connect the inlet (12 volt dc) side to your battery bank. then plug your 120 volt AC appliance into the inverter.
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Old 09-22-2011, 11:23 AM   #12
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Thanx a lot guys. I think I have a good idea of what I'm going to do. I appreciate the help and ideas
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Old 09-22-2011, 11:02 PM   #13
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I know this is not an answer to your power question regarding a power operated fan, but, have you considered a dry cell battery operated fan? I have one that takes "D" cells and that makes it totally portable. Put it on the picnic table when you are outside.

Just a thought - works for us.
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Old 09-22-2011, 11:21 PM   #14
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Funny you mention that, As a matter of fact, i was in K-Mart today and seen a battery powered fan with a little LED light in the middle. Takes 2 D Cell batteries and says it lasts for up to 100 hours on a set. I think i may get that until i get a permanent fixture 12 volt supply put in. Thanx!
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