Radiant & Hydronics Are Consumers 'Trading Down'? By Katie Rotella February 23, 2009 How the current economic downturn will shape buying habits of tomorrow’s consumers.A few years ago,PMwrote about the concept of "trading up" "LinksEditor Blogs @ PM's Pipeline Share This Story Katie Rotella was the senior editor of Plumbing & Mechanical from 1999-2009.