Agreed, but it doesn't make it more efficient, just cheaper. Insp tech is superior but cfu is cheaper. They are aiming at different markets, insp the commercial and cfu the domestic.
Wrong, try Inspirit energy's mchp, 92% efficient. A lot has happened since 2011. Lots of companies trying to get in on the act. Very happy with my cfu holding tho and it's potential. Also in Insp. ATB Gl today