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 sells various styles of 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.
Polar Furnace UPDRAFT RG5
Polar Furnace UPDRAFT MD9 Share
STANDARD OUTDOOR WOOD FURNACE Polar Furnace’s STANDARD Heater delivers on simplicity. Nothing is complicated about this heater. St...
Polar Furnace UPDRAFT MD9
Polar Furnace UPDRAFT LG15 Share
STANDARD OUTDOOR WOOD FURNACE Polar Furnace’s STANDARD Heater delivers on simplicity. Nothing is complicated about this heater. St...
Polar Furnace UPDRAFT LG15
Polar Furnace UPDRAFT COM32 Share
STANDARD OUTDOOR WOOD FURNACE Polar Furnace’s STANDARD Heater delivers on simplicity. Nothing is complicated about this heater. St...
Polar Furnace UPDRAFT COM32
Polar Furnace G-CLASS G2 Share
G-Class is all about making wood burning as clean, simple, and easy as possible while eliminating your high heating bills. To accomplish this, the ...
Polar Furnace G-CLASS G2
Polar Furnace G-CLASS G2 Plus* Share
G-Class is all about making wood burning as clean, simple, and easy as possible while eliminating your high heating bills. To accomplish this, the ...
Polar Furnace G-CLASS G2 Plus*
Polar Furnace G-CLASS G3* Share
G-Class is all about making wood burning as clean, simple, and easy as possible while eliminating your high heating bills. To accomplish this, the ...
Polar Furnace G-CLASS G3*
Original HotRockPanels Share
Our original HotRockPanels provide an all-in-one insulator, moisture barrier, and PEX tubing fastener. Designed to be placed below the concrete slab t...
Low-profile HotRockPanels Share
Our new Low-Profile HotRockPanels make it easier than ever to add radiant in-floor heating to your next renovation, retrofit, or upper floors!With the...
STANDARD OUTDOOR WOOD FURNACE Polar Furnace’s STANDARD Heater delivers on simplicity. Nothing is complicated about this heater. St...