PTC Fan Heater 110V 400W Electric Ceramic Heating Element Energy Saving Constant Temperature Thermistor Insulation with Power Cord, PTCYIDU

Heats up and old fridge by itself real quick. Use it for keeping my 3d filament warm and dry.

Bought this for my 3D printer enclosure to help with printing engineering filaments like ASA. This works like a charm! Puts out a decent amount of heat, especially for its compact size. Great value for the money here! Air flow won't blow anyone away, but you don't really want a TON of airflow for a heater like this - just enough for circ. Looks like it's well engineered, too.

Been using it for a few months now for starting seedlings and it works well when used in tandem with a temperature control probe. Heat output persists in its intensity and ability to reach high temps quickly, build quality remains intact so far.

So far so good, I needed a small heater to control the temperature in a 3sq ft control box outside and it is performing well in 15-30 degree outside temps and has no problem maintaining 45degrees on a thermostat.

Living in New York, the winters get pretty cold. I use a wireless Thermostat to monitor the birdhouse temp and an alexa device to power up the heater. 9 degrees outside, 39 degrees in the house. I will buy again for a larger house I will be building in the spring.

So I have this hooked up to a heat sensor to keep a spawn chamber at the correct temp. Have never had such great spawn rate.

I'm very satisfied with these little heaters. They work well and have good quality wiring and build quality. I have mine plugged into a thermostat that takes all the worry out of things.

While this does work effectively there is a bit of concern about the safety of the wiring at the heater itself. After running this for 10 minutes the joint where the 3 power feeds to the ptc crimp together get extremely hot. I opened it up and put a couple wraps of Kapton tape in separating the hot and neutral joints just in case it melted. I wouldn't leave this thing running unsupervised, I believe the leads to the heater itself are undersized causing the issue. That being said the joints, heat shrink and crimps look fine otherwise. When running it definitely has a smell and the noise is tolerable. I'm using it for a filament dryer, in an uninsulated 19litre water tight box box it gets up to 150F in about 10 minutes or so. I haven't used it for the full drying time yet so my review may change.