The GARN Wood Heating System (WHS) is a wood boiler that combines full heat storage with a patented wood-gasifier combustion design in a single piece of equipment. This unique combination of technologies means wood burns so hot and efficient that a GARN squeezes virtually all available heat out of each cord of wood while eliminating smoke and creosote. When you purchase a GARN, you’ll own the highest-efficiency, lowest-emissions wood boiler available.
Our wood boiler models range in output from 160,000 BTUH to 700,000 BTUH and can be used individually or in tandem to serve rural commercial, industrial, farm, greenhouse, shop and multifamily residential heating applications. GARN® WHS units are UL and CSA certified for use in the US & Canada; and have been emissions certified by an independent lab.
Manufacturer’s Rated Heat Output Capacity (BTU/HR) : | |||
160,000 | 177,000 | 200,000 | 700,000 |
Efficiency (LHV) : | |||
86.6% | 73.3% | 82.0% | 85.0% |
Energy Stored (120 F to 195 F) (BTU’s) : | |||
649,100 | 892,300 | 1,196,900 | 2,083,000 |
Firebox Volume (cu ft) : | |||
14.7 | 17.4 | 17.4 | 33.4 |
Firebox Length (inch) : | |||
32.0 | 40.0 | 40.0 | 50.0 |
Water Capacity (gallons) : | |||
1,015 | 1,420 | 1,830 | 3,200 |
Weight Empty (lbs) : | |||
2,200 | 3,140 | 3,570 | 7,500 |
Weight Full (lbs) : | |||
10,630 | 15,000 | 18,830 | 34,500 |
Supply/Return Ports : | |||
1-1/2″ FPT 1″ MPT |
2″ FPT 1-1/2″ MPT |
2″ FPT 1-1/2″ MPT |
3″ FPT 2-1/2″ MPT |
Auxiliary Ports, 3/4″ : | |||
2 x Front 1 x Back | 2 x Front 1 x Back | 2 x Front 1 x Back | 3 x Front 0 x Back |
Flue Specification : | |||
UL-103HT 6″ ID, Double Wall 1″ Packed Insulation |
UL-103HT 6″ ID, Double Wall 1″ Packed Insulation |
UL-103HT 6″ ID, Double Wall 1″ Packed Insulation |
UL-103HT 8″ ID, Double Wall 1″ Packed Insulation |
Flue Configuration : | |||
Vertical or Horizontal | Vertical or Horizontal | Vertical or Horizontal | Vertical |