Does anyone know how many amps an Fantastic Fan pulls?
I would like to know about running this thru the night on my two 6 volt batteries running as a 12 volt with a total of 432 amp hours.
Forum Discussion
43 Replies
- Hmmmm
"Invader build huge blaze. Must sit back and freeze or clothes catch fire" - I close the door when using the fantastic phart fan. There's a nice 1 inch gap at the bottom of the door to the bathroom, to clear the carpet, makes for a good place to draw air from when the door is fully closed, to ventilate up and out. It makes a nice inlet for air from the rest of the trailer. Turn the fan on, do your business with the door closed, and the fan will work as designed, fantastic at removing moisture, stink, whatever. Slow speed is plenty good enough for me.
marcsbigfoot20b27 wrote:
I have 2 fantastic fans from 2000.
All measurements with clamp on ammeter at the converter wire/fuse for each fan....converter was on with 1 new AGM 12 volt battery fully charged.
Front bedroom fan with temp control, bulb style. 4 amp fuse, 25 watt motor/5000RST
Low 0.8 amps 5.4 mph 509 ft/min
Med 1.3 amps. 6.6 mph 605 ft/min
High 1.8 amps 7.5 mph 700 ft/min
Rear fan no temp ctrl, 6 amp fuse, 36 watt motor/400R
Low 0.8 amps 6.1 mph 561 ft/min
Med 1.1 amps 7.6 mph 700 ft/min
High 1.5 amps 8.8 mph. 826 ft/min
I have no idea why the lower wattage motor is pulling more amps except that voltage drop must be in play since the rear fan is only a few feet from converter and the bedroom is a 20 foot wire run.
Update:
Edited after Mex made me run to the store to get a new 2032 battery for my wind speed meter that's been sitting in my toolbox for a few years. TP test is too subjective....single or double ply?- They should all be exactly the same as RV manufacturers all use thick wiring of the same exact length for a precisely known amount of voltage drop and all RV batteries will have the same voltage always.
As if.
Also, the amount of dust build up on the blades makes a difference in amp draw. My computer muffin fans, I was surprised to find that a dusty impeller reduces amp draw. Not surprising is that a clean fan moves more air, but it also makes more noise, as it is spinning faster.
Restrictions, like a dusty screen behind the impeller also increases noise, greatly reduces efficacy, and uses slightly less amperage, in my experience.
Higher voltage and higher speeds means more amp draw on muffin fan motors, in my experience.
Don't know about fantastik.
Measure voltage at fan, not battery.
Or just argue and shake your fist at the sky - As my uncle "Chick Armitage" once quipped...
"The smart outhouse builder situates the structure so ventilation air enters from the business entrance and exits out the back"
I will not discuss the reverse. TurnThePage wrote:
Another clever use for TP! :B
Use flapping TP by a DC fan to see if the fan is sucking or blowing. When wiring it up you can get the wires backwards.- Another clever use for TP! :B
- Obstinate MEX, uses the BS versus Reality formula - true to form. Grumbles of "@#$%&! it ain't worth it" grace my decisions regarding energy consumption.
Before one can get all excited about old black versus new gold motors, I would advise comparing, meaning "Heads Up", air flow between the two fans at any given speed selection. Energy (harp harp) can only be translated never "lost"). Find out why the difference.
Outhouse Grade Test. Take a flap of toilet paper and keep moving further and further away until the paper stops flapping. Now try it with the "other" fan. Is the distance different? - Mex would be right about using the #2 speed in our 3 speed for amps vs blow.
Ours is from anytime before Oct 2002 when our trailer was built. It does not look like the one in the photo above. Ours says it has a 6a fuse, can't see the motor, turns on with the speed setting knob, no on/off switch, has a heat strip with a knob for that but never tried it if it works or not, lid has to be opened for the fan to work.
Using the Trimetric with a standing draw of 0.3 I subtracted 0.3 from the amps showing with the fan running to get the fan's amps of 1.2, 1.7, and 2.4 marcsbigfoot20b27 wrote:
I have 2 fantastic fans from 2000.
All measurements with clamp on ammeter at the converter wire/fuse for each fan....converter was on with 1 new AGM 12 volt battery fully charged.
Front bedroom fan with temp control, bulb style. 4 amp fuse, 25 watt motor/5000RST
Low 0.8 amps
Med 1.3 amps
High 1.8 amps
Rear fan no temp ctrl, 6 amp fuse, 36 watt motor/400R
Low 0.8 amps
Med 1.1 amps
High 1.5 amps
I have no idea why the lower wattage motor is pulling more amps except that voltage drop must be in play since the rear fan is only a few feet from converter and the bedroom is a 20 foot wire run.
So you must have the older, black motors?
take care of them, the new replacements suck.
