Harkness Equipment has over 35 years of experience with outdoor wood heating. In 1979, Jim Harkness became interested in renewable heating sources, specifically wood furnaces. Jim installed a wood boiler in one of his shops, which could handle 18” wood pieces and was tied into his residence heating system. The success with the original wood boiler lead Jim to install the largest model of Wood Doctor wood boiler, which could handle 6’ wood pieces and was tied into his residence and the business’ heating systems. The performance of the Wood Doctor wood boiler lead Jim to have Harkness Equipment become a Wood Doctor (now called Polar Furnace) dealer. Since 2018 Harkness Equipment has been a dealer for both Portage & Main and Polar Wood Boilers. 
Harkness Equipment began with selling outdoor wood furnaces, but evolved into supplying all your outdoor furnace supplies. In addition to selling the units, Harkness Equipment carries a complete line of hydrualic heating supplies, including insulated underground piping, in-floor piping, heat exchangers (either water-to-air or water-to-water), pumps, manifolds, fittings (black, stainless steel, copper), as well as pex compression and shark-bite fittings.