Not anymore.
Using dehumidifiers for residential water production is not even remotely economically viable. Even forgetting the cost of the equipment, a good rule of thumb for the energy requirement for a consumer-level dehumidifier to extract/condense water from the air in a relatively dry desert climate is about 1 kWh / liter, which translates to about 3.785 kWh / gallon of water produced. Even here in TX where our average residential electricity rates are below the national average they're currently running at around $0.145 / kWh, which means that JUST the electricity to run the dehumidifiers would cost ~$0.55 / gallon of water produced. That's a very, very expensive way to get water, especially when you add in all of the equipment purchase, maintenance and other costs.
Even if you used a solar installation to run things the electricity is still not free. The best estimates I've seen for a high sunshine area is something like $0.08 / kWh produced by the system. While better, that's still a hair over $0.30 / gallon. It would be FAR cheaper to just bury a tank in the ground and have potable water trucked in.
DParker, the dehumidifyer for water is only if you got tons of electric. Right now, this time of year, I am totally off grid, I pretty much met my max that i can sell back to the power company for the year, so rather than waste / not use the electric i just use it to make water / with the dehumidifiers with.
also, with that, I was also more and I should have been clearer about it, your AC puts out water, USE that water, you already 'paid for it' so use it
I did not comment on having water trucked in because I have no clue what that would cost, but in that case if it is eco, then absolutely do it, but I believe the OP said they are going to collect rainwater too.
If you really must, run two systems. Pure Pot, and NonPot but clean. You drink the absolutely pure water, the rain water, etc, cook with it if you are heating /hence purifying, and do laundry with.
one other thing I do, which I don't give a rats ass how stingy people say I am. Laundry I rinse it twice in the machine. One rinse is NEVER enough, go look at what comes out of your 'rinse' cycle and you'll never just rinse once again. Anyways, I collect the rinse water from the machine and if it's first rinse, it is used to flush the toilets with, and water stuff. if it's second rinse, if I got another load to do, it fills the machine up for the second load, if no second load, is used as well for flushing / floor cleaning / watering etc.
My geek - nerd boy - laundrymat.
I have a fancy schmancy washer, I wanted the agitator less ones so I can do bet covers and HUGE loads, I have a heat pump dryer, and I have a heat pump hot water heater.
Do laundry, throw laundry in dryer, while it dries, it DOES produce external heat, it has to, it can't help itself, so instead of wasting that heat, or in the summer, having it all go into the house and make the AC work harder etc. When I turn the dryer on, I also turn on the heat pump water heater, so the heat that comes out of the dryer, goes right back into the hot water, its reused and keeps it out of the house. BTW the water that comes out of it can be used for laundry too. I am also looking into a reuse system so I can reheat laundry reuse water. I have a tilapia pond which will need someheat input in the winter months, so this hot water heater via a heat exchanger will also be used to heat that water somewhat too. and ass tons cheaper than burning thru a heating element.
Aaron