What is going to happen if I hook this 24v fan up to 12V? I'm trying to add a little bit of ventilation to my dog box in the bed of my truck to be wired directly to a separate 12V battery.
Should work A Battery drill runs slow when battery volts drop. Fan should run, but slower. Bench Test run it an hour & see if the armature stays cool Use a small amp fuse for safety Don't want to start a fire if the motor seizes up
What 12v source are you hooking up to? You could always use two small batteries in series at get the full 24v.
I bet it'll run, but at only half speed or so. 12 volt fans are cheap. Don't chance an electrical fire and losing your awesome pooches. Don't forget an inline fuse of the appropriate size, and use wire of the appropriate size for its draw.
Does your truck cap have a sliding window on the side that you could make an air scoop and push air in?
Yes I definitely don't want to risk the Hounds! The original plan was an in line blower like this for bilges. The one I tried out was way too powerful and noisy, it freaked the dogs out when I turned it on. You don't want 5 excited dogs inside the box, and I don't want the noise to draw any unwanted attention to the truck. I will occasionally leave them in the box for some time. I need the dogs to be secure in the box, have little stimulation (not able to see out) and not draw any attention to the truck when parked. I built the box so that I can add foam board insulation for winter use. I would like to be able to use the fan in the winter also, on a timer just to make sure they have fresh air, but not cool the inside of the box off too much, hence the in line blower idea as I could add a baffle. It's not really a problem when moving. 12v deep cycle
Can I ask how a fire would be possible? As I am remembering its explained to me like a garden hose, if you think 12v is average and 24 isn't twice as thick but in diameter thicker, shouldn't the risk of fire be lower in this regard if the same 12 volts run through?
One thing I know about bilges is that they run high speed no matter what. If you find a blade that is larger but runs slower as these guys are saying you're drawing about the same amount of air. This would be if its air tight and the fan is the same diameter as the vent diameter. I wouldn't recommend an RV bathroom fan that runs quick but rather a larger one that runs slow as the volume of air coming out would be greater. Would be easier on your batteries as the cycle would draw less.
I'm not an electrician, nor did I stay in a holiday inn last night. Iirc, a 24 volt fan will pull more amperage when voltage is reduced. More amps means more heat. exammple.....Run your cars blower motor with a battery that's dead (under 11 volts), and without the alternator or motor running and tell me how long it takes to burn up your wiring harness (ok....don't try this. You will fry stuff is my point) I did exactly as my example. Trucks batterys died while plowing. Alternator couldn't keep up with needed current draw. I quit plowing and limped it to auto parts store. Put new alternator on in middle of parking lot in blizzard. Truck worked but barely. I fried wiring harness to blower motor ( I shouldve turned heat off), plow lights, abs and traction control brain box, and some wiring connecting the 2 batteries. So yea.....buy a 12 volt fan and do it right.
The fan is spec'd at 24V but the allowable input reads 12-30V. More amps does not = more heat, power (heat) = current x voltage. It will run, it will pull more current. The amperage rating on your power supply is the only thing of concern (and always use an in-line fuse.) Those fans are obnoxiously loud, and move a lot of air. I'd rig up a small house fan on an inverter that plugs into 12V outlet. I did not spec out the fan/ inverter match, just for the sake of clarity. Amazon.com: Honeywell HT-900 TurboForce Air Circulator Fan, Black: Home & Kitchen Amazon.com: Maxboost 300W Power Inverter Dual 110V AC Outlet + Two 2.4A/24W USB Smart Ports Car Charger [Aluminum Body] DC 12V to 110V AC + DC 5V USB Battery Charger for laptop,iPad,iPhone,Tablet,phone: Patio, Lawn & Garden
12v permanent magnet D.C. Motor (brushless) isn't going to complain about only getting 12v. It will just run slower. Are there viable solar options?
