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Old 08-10-2012, 12:06 PM   #1
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Join Date: Feb 2010
Posts: 4,278
Portable fan

So we have a very old ceiling fan made by 3-T, works great, thermostat controlled, 3 speeds and reverse.

But it draws about 6 amps, too much to have running in driveway to keep hot air out.

So we found some surplus muffin fans, 4 inch, 110 to 120 CFM at 12 volts with curent drain of 0.49 amps, ordered 9 because they were only $4.95 each, only 4 needed, so what to do...what to do...

looked through the catalogs and discovered a 5 amp hour gell cell that was about the same width as the fan, twice as thick, and figured we would get 10 hours of run, they are rated at the 8 hour rating of 5 amp hours, so we should get more.

The fan has a good strong air flow, is portable and has a good run time on the battery.

Now the description and humor of the day.

Dug in the shop for some scrap wood to prototype as it had to have no screws on the top, everything fit within the width of the fan and look OK.

Required some bridgeport work to cut out where the switch goes inside due to tight space, a router could have cut the notches for the fan, but Bridgeport works better.

Fan slides in slots from the bottom, then spacer and battery followed by bottom, only 4 screws in the whole thing for the bottom.

Case is made from old Oak flooring that was milled together to create usable material.

The grile is brazing rod that was inserted into template guided drilled holes done after the finish appled.

We being cheap, we used what would have been burned in the fireplace, now we are called good guys for re-using old stuff, been doing it for years because I am too cheap to buy new, it is now a fashion statement.

So we can get "trendy" and call these truly green fans.

Wood was harvested flooring from house that was burned, dug out of roll off container.
Fans were online purchase from company that harvested them from equipment to be scrapped.
Batteries are lead acid, made from recycled lead and plastic.
Wire, switches and other materials harvested from junk in the shop.
Can charge of of shore line or the solar panel we picked up at a yard sale.
Utility power is PG&E, this portion of the grid is fed by hydrogeneration.

So everything was either used or recycled sourced except fo the glue and finish, but they were leftovers from some other project, so maybe they count too.

OK just being funny on the green fan, it is friday...
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Tony & Lori
1989 Country Coach Savannah SE
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Old 08-10-2012, 06:46 PM   #2
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Very nice looking. I used compute case fans three speed 12V.

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Old 08-10-2012, 07:16 PM   #3
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Workhorse Chassis Owner
Join Date: Dec 2010
Location: Northern Virginia
Posts: 1,193
Good job and thanks for the ideas.
Tom and Amy from Northern Virginia.
2000 Allegro 454/Workhorse P32/TST/Crossfire
Life is a DIY project - enjoy it.
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