Inside an Aldi dehumidifier.

Clive, you might want to clarify your description of the "junction" given that the only junctions are the conductive end plates bonded to solid, bulk (non-diffused) silicon pellets between them. Your explanation may confuse those unfamiliar with the technology into thinking of it as a silicon junction (i.e. diode). While it doesn't pertain to the dehumidifier, you totally skipped past the "generator" ability of a Peltier module where you can apply hot and cold to get power out. I find the things quite fascinating! A particularly useless application of the technology is in "solid state" water coolers. It neither heats or cools the water very well. Fortunately, they were not seen on the market very long.

Mike Cowen

I love me a Peltier Junction. I tried to design a Peltier-based silent heating/cooling system for manned surveillance vehicles back in the late 90s, but the power requirements were so horrific that I literally blanched and moved on...

Michael Thompson

Many air processing units have an option of an ioniser. It's not always implemented that well.

Big Clive

Keep in mind that the continuous power draw of these units can add up over time.

Big Clive

If you can open your existing dehumidifier easily it might be worth cleaning it.

Big Clive

Don't compressor based units have an inbuilt ioniser to zap airborne viruses and so purify the air?

Andrew Donaldson

"Mmm, interesting... so dry." Really feels like it should be taken out of context.

Matt Tester

Clive, thank you so much for publishing this just now. I have a very similar unit that I have had running for a couple of years in my "workshop" -- a shed in the garden. The unit has saved my tools from rusting for all of that time, but it has recently failed -- hence the serendipitous timing. Thanks to your video, I believe that the thermal trip has gone in mine, which I will now go and check. Yes, I do have a compressor-based replacement that I should now put into service instead (but it seems complicated and isn't fit-and-forget, as this one has been). If I can get this one working again, I may well use it in another shed that I use for storage. Thanks for the hours of entertainment you have provided me. I now have several projects lined-up as a result. :-)

I kinda want to get this kind of dehumidifier. The one I have works ok but it smells funny. I would rather have one that doesn't smell. I was replacing a cooling fan assembly for a laptop a while back. The new assembly had thermal compound already on it. They were little dry pads. They weren't at all like the stuff that comes in tubes. When the parts went together they would squish and spread out ok. A bit like oreo cookie cream. It looks just like what you were seeing in the dehumidifier.

Nani Isobel