That's interesting but is sadly unhelpful without knowing how many gallons or liters it's able to pull out per day, or how far down it gets humidity, or how quickly it goes through salt.
E.g. my $200 dehumidifier pulls around 3 gallons of water out of the air per day, on a hot and humid summer day, to keep indoor RH around 55%.
It's very hard for me to imagine a bucket of rock salt pulling 3 gallons of water from the air, or being able to bring RH down to a target ~50% range. And even if it did, it seems like you'd probably spend more on salt over the course of a couple of summers than you would on a dehumidifier in the first place.
Exactly, we pull 5 gallons a day lately in SF. You'd go through hundreds of pounds of rock salt I'd imagine to compete with our ac
Can’t imagine how this would match the capacity of a good sized unit. I have been renting a garage that had some leaks, and the amount of water my dehumidifier extracted when it was damp was enough to have a solid trickle of water out of the attached garden hose (into a drain). This salt dehumidifier might be good for intermittent light dampness, but I can’t see this filling a bucket in a day like a condenser based dehumidifier.
This sounds wasteful and like it won't work well unless the space is air and moisture impervious.
> Because rock salt is hygroscopic it absorbs moisture from the air. If your plan is to get rid of the humidity in a damp basement, start with a 50-pound bag of sodium chloride to make your rock salt dehumidifier. These can be found at most big box hardware stores. While you’re there, you’ll also need two 5-gallon buckets. Here’s what you’ll need to do next:
> In one bucket, drill several small holes into the side and bottom of that bucket
> Nest the drilled bucket into the other bucket
> Fill the bucket up with rock salt
> Collected water will drip through the holes in the inner bucket into in the outer bucket over time
> Empty the outer bucket as necessary
> Refill the rock salt as needed
(https://www.reddit.com/r/homestead/comments/wziu44/the_basem...)