BQLZR Huge TEC1-12730 253W Thermoelectric Peltier Cooler Cooling 62mm x 62mm x 4.8mm

डिअर सर, प्राइस ऑफ टू हाई फार द रिसर्चर पीपुल एंड इंजीनियर टू डिवेलप नैनो एयर कंडीशनर इन लेबोरेटरी एंड पेटेंट रिलेटेड एसेंशियल फॉर्मेलिटी वर्क.!थैंक्स,

This Peltier is the largest unit I have purchased to date. I have several smaller units, but this puts out the most "cold" I've ever seen. When I first received it, I tested it with a 1.5 volt D cell battery. It started getting cold/hot almost instantly even with that low power battery (great way to test without burning yourself I might add...and also an excellent, safe way to find the "cold side"). This Peltier unit will require a large power supply. Just to be sure I had enough power without overheating, I bought the 1000 watt, "AmpFlow SCN-1000-12". Then I used a "Cooler Master Hyper 612" for the hot side (plus another solid copper heat sink mounted to it), and a "Cooler Master Hyper 212" for the cold side. All works quite nice, but you better have an outside outlet for the hot side, or you will waste all the cold you produce (and there's a LOT of cold coming off this 62 x 62mm Peltier unit. Very nice unit, at an excellent price. I'm ordering a second unit for future projects.

Fast deliveryPeltier complete waste of money.Like all other on amazon they just don't work or burn to fast.This peltier is just heater cold side never ever will be ice cold or at least get you below ambient.Started from 6 volt up do 14 than 18 power supply was 1 - 20 volts, 85 amps. Peltier just dont get ice cold no matter what you doing.Had 5 of this all same no matter how coll you get hot side cold side just limited to some 0 temps or somthingGet alot hotter than pumped head from cold to hot side and mega slow getting cold side cold where hot side just starts go on fire.If you buying to cool somthing dont bother whit this product.

Minimal cool down at maximum input power (down only by few degrees), was properly assembled with a large copper heatsink and fan attached. Will return it for refund.

I just bought this as an experimental mess around kind of thing and I don't doubt it pulls 253W, in fact I'm pretty sure it pulls more than that as it takes two old computer PSU's to power it. The amount of heat this thing produces is crazy but given how Peltier's are this isn't really any surprise (unless something's wrong with mine) I can't actually cool it enough to make it very cold on the cold side. I think I'll have to devise some kind of water cooling system if I was really serious about using it for something. But since this was just a fun play around thing I don't know if I'll do that. I think most of the negative reviews on here are from people who don't have the ability to cool it properly.

I'm using this to heat aluminum for a print bed on a 3D printer. It heats up the 150x100mm print bed to 90c in about 3 minutes on a 12v supply using an SSR with a PID controller to maintain that temp (it can go higher but I don't need to). It's attached in the center with a thermal epoxy. I've used it over 50 times now and still going strong. I need to do a little more experimentation, but I added a heat sink on the cold side, thinking that it would gather more heat from the air, but I'm not sure if that helped or not.