On a busy manufacturing floor inside a cramped 85-year-old converted dairy creamery in the city of Tower in northeastern Minnesota, a handful of workers are welding together a wood-burning furnace ...

TOWER - They say Iron Range Finns are usually a reserved bunch, but Daryl Lamppa talks about his Kuuma wood burning furnaces with the zeal of a traveling street preacher selling the Good Book. Lamppa ...

Tower company claims to have best wood furnace around Restricted in some big cities as smoke-belching smog machines and targeted by the federal Environmental Protection Agency for tough new emissions ...