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 another wood boiler that could handle 3’ wood pieces. In 2004, Jim installed the largest model of Wood Doctor wood boilers, 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.
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.
ID # 34312176

Polar Furnace UPDRAFT LG15

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Overview

STANDARD OUTDOOR WOOD FURNACE

Polar Furnace’s STANDARD Heater delivers on simplicity. Nothing is complicated about this heater.

  • Step 1. Get wood – any kind of dry wood will do (if it isn’t dry wood, let it dry for a few months).
  • Step 2. Load the firechamber.
  • Step 3. Ignite the fire.
  • Step 4. Close the rugged firechamber door, walk away and enjoy the comfort of reliable hot water.

The STANDARD heater will do the rest and generate hot water for all your heating needs. Designed to be simple and reliable with a waterjacket, firechamber and loading door manufactured from 1/4″ thick certified steel, the STANDARD models provide years of trouble-free service.

  1. Strong Spacious Firechamber – the large round firechamber allows for longer burn times and less frequent loading. 1/4″ Thick certified steel helps ensure long service life.
  2. Heat Exchanger Pipes and Baffle – Increase total heat transfer by routing air the full length of the fire chamber and increasing heat exchanger surface area.
  3. Heavy Duty Loading Door and Latch – Rugged construction ensures your loading door will never fail. Positive pressure latch design ensures a good long-lasting seal, increased service life and performance of door gasket.
  4. Rugged and Large Waterjacket – Keeps the heat inside your heater while keeping the winter cold out. More insulation is better.
  5. Commercial Quality R20 Fiberglass Insulation – The heavy waterjacket is manufactured from 1/4″ thick steel. A larger, higher volume waterjacket results in longer burn times, less cycling, less smoke, and a more stable hydronic system.
  6. Rugged Outdoor Housing – Roof panels and trim are made from heavy 14 gauge steel and coated with UV resistant paint. Heater sides are covered with commercial grade all-weather overlapping siding for a tighter seal.
  7. Simple Reliable Heater Controls – Non digital simple Honeywell Aquastat controllers provide reliable and precise control of the combustion process.
  8. Insulated Chimney Hookup – Used to connect the heater to an insulated chimney and rain cap, the Insulated Chimney Connection ensures a reliable, long-term seal between roof and chimney.
  9. Spacious Plumbing Area – Spacious plumbing hookup area for convenient installation and easy access to the pumps and power disconnect. Room for additional insulation to insulate piping, pumps and valves.

 

Specifications
Model
LG15
Category Name
Furnace & Heating
Sale Type
New
Manufacturer
Polar Furnace
Weight (lbs)
3400
Max. Wood Length (in)
54
Water Capacity (US Gal.)
220
8 Hr. Output Rating (BTU/hr)
140 000
Wood Load Door Opening (W X H)(in)
23.5 x 26.5
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