From an engineering perspective, I would be concerned that the filters would tend to get clogged with hair and soap. They are not going to get drinking quality water from a few filters and UV though it would be useable gray water.
The company cost savings does not include filter changes, recirc pump
maintenance, or general
maintenance requirements. Its actually very hard to verify exactly what energy costs they are including in their system. Yes water use is reduced and
heating hot water is reduced. But only about 60-65 percent of shower water is hot water anyway. So a 10 minute shower would use maybe 20 gallons of hot and 10 gallons of cold, plus or minus a bit. Plus they have a pump and maybe a UV lamp. Plus a instant water
heater to warm the reuse water up 5-15 degrees.
Nor do I see an estimated cost of the installed
equipment including GFI protected pumps,
heater and lamp.
Sure I could design one for you too. Its not that hard to save the cost of water, but the installed cost and maintenance costs of such a system would not be zero at all. Plus bacterial growth in the water collection pan would be lots higher.
Think about the maintenance the typical
shower sump on a boat needs and how often you have to remove the soapy hair from the strainer. Or the smell of the shower water sitting in the
bilge for those with on board showers.
I need a bit more information then the company web site provides to even see if its viable. They are providing only part of the total overall operational costs to that system. Lots O
marketing, not a lot of substance.