Came across this article about 10 useless product including Tyvek, programable T stats and power roof ventilators

http://www.linkedin.com/news?actionBar=&aIdx=9&articleID=71765444&aogid=73335889&gid=59247&gid=59247&srchType=nws&srchCat=WOTC&trk=news_brkout&goback=%2Eanh_59247%2Envr_59247_1

He's only talking about the "low E" Tyvek (and I agree that like most products that rely on low emmissivity, it's benefits are likely oversold).

And he (rightly) takes back the bit about programmable T-stats with a sidways comment about whether they actually get programmed (the presumption being that most aren't?)

I'd put nano-scale insulating paints & paint additives way ahead of programmable T-stats and cheap unglazed solar panels.

How do I access that web page. LinkedIn wants me to log in?!

try again mine doen't show a Linkedin login?

Try this link instead:

http://www.greenbuildingadvisor.com/blogs/dept/musings/martin-s-useless-products-list