Fdit PTC Car Fan Air Heater for Small Room Space (12V 100W)

It's a simple heating element. I use this element as the main piece in a heater unit to keep my 3D printer at a constant, elevated temperature at about 33C. For this purpose it has worked very well and I have gained a great deal of trust/confidence in the unit. My duty cycle is about 20 seconds on and maybe a minute or two off when it is just maintaining temperature, so it does not get run too hard. It has been reliable and still working well after being in operation for a few months now.

I measure 2 1/4" square but that is just what I need under the drivers side dash. (no room for a hose now with gauges I installed.) Good for a bit of thawing before the car warms up. It does ok for its size but it is very small so it will not warm the whole car. It is quality made.

So I ordered a 60mm 150w version of this from another seller and expected it to peak at maybe 75w given the reports of this one peaking at 50w. It ended up pulling 194w before I shut it off - about 10 seconds in to operation. No good.So this one arrived later that same day (today) and I did the same test. Ran it for 20 minutes and never saw above 68w draw - which includes losses going from 120v AC to 12v DC via a power brick.Good enough for me even if not 100w. I installed in my project and let the thermostat do its thing. The fan on this unit is acceptable to be able to hold your hand an inch away from the output, if it were half the speed it'd move less air over the aluminum fins and be warmer. So that's OK and I was excited to give it a test.What I found is that it heated my project (ammo can) +4 degrees in about 5 minutes. Absolutely perfect. Then I checked how much power it was consuming (this time via calibrated shunt, zero AC->DC losses) and it was at 94w.It must be a voltage thing. The power brick is a constant 12.22v output and the battery inside my ammo can is 13.6.So perhaps expect less heat / watt draw at lower voltages - and rated wattages at 13.6+More testing to be done before project gets implemented.

Even under bench conditions, this fan puts off so little heat you can rest your hand on the heater coils and barely feel anything. I did not see anything in the description saying no returns, but you cannot return this product. It's a good little fan, but a worthless heater.

NO instructions. Works when connected to separate power sources (not very practical). Used too heavy of wire, got smoking hot very quickly (literally). Used too thin a wite, no juice. Used battery terminal connectors of a smaller size and heater works great. Connected fan separately and it worked also. Hoping it will work for a different purpose than planned.

My tests showed about 65w did not produce much heat but in certain applications a little heater like this could be handy to keep things from freezing in small places.

For those of your looking for a DC load for your battery work, this is great. It drains a 12S NiMH 6.5 AH battery in about 20 minutes, which helps with balancing the cells.The heater is weak, unless you're very close to it, but I bought it for a DC load.

Great little heater! I was surprised by the amount of instant heat this provided on 12v.As long as you know what this is and aren't trying to heat a room or something inappropriate for a 100w heater, if you need a small heater for an enclose: this is a great deal! I hooked it up to a temp switch to take the edge off the freeze for my enclosed camper waste tanks.