Wood heat, a '70s idea, catches fire again

business appears to be warming up once again for Martin Lunde and his Garn WHS wood-fired heating systems. Lunde, a consulting engineer, began developing his high-efficiency, clean-burning system as both oil prices and interest in alternative energy rose in the 1970s. As those conditions returned in recent years, Lunde has rekindled production, largely shuttered since plunging oil prices froze him out of the market in 1989... read full from Star Tribune