GARN® WHS Wood Fired Hydronic Heaters
The GARN® WHS (Wood Heating System) line of wood-fired hydronic heaters combine high-efficiency wood combustion and hydronic thermal storage to make the most efficient and effective wood heating units on the market.
- Two-Stage Combustion ensures low emissions so there is virtually no smoke, creosote, or ash.
- Five-Pass Heat Exchanger ensures efficient combustion heat transfer into thermal storage.
- Integrated Thermal Storage allows heat to be drawn off as needed between burns.
- Water-Based Delivery ensures efficient transfer of the stored heat to the building or application.
- Easy Integration with radiant floor, hot water baseboard, cast iron and European style radiators, forced air furnaces, or other heating systems allows the units to be added into existing applications or new construction.
The non-pressurized system is safe and certified to be installed indoors or remotely in a small shed.
GARN® WHS units are certified by independent lab tests to comply with all applicable UL and CSA Standards, and are the only wood-fired hydronic heater certified for both horizontal and vertical flue venting.
GARN® WHS units are certified to burn cord or slab wood; pallet and other scrap wood; densified wood briquettes; and air dried corn on the cob.
GARN WHS Features and Benefits
Features
- Integrated Combustion and Thermal Storage
- Double Weld Contstruction
- Secondary Combustion (Gasification) Chamber
- 5 Pass Heat Exchanger
- Epoxy Lined Tank Bottom
- Large Insulated Loading Door
- Double Lock Safety Handle
- Dispersion Return Tube
- Manway Access
- Induced Draft Fan
- Air Cooled Door
- Outside Air Combustion
- 30 Years of Proven Technology
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Benefits
- No Overnight Loading or Fire Required
- Long Life, Low Maintenance Construction
- Reduced Wood Use
- Low Emissions
- Easy Load Fuel Chamber
- Cool to the Touch Loading Door
- Smoke-Free Wood Loading
- Easy Maintenance and Part Replacement
- Reduced Corrosion and Unit Failure
- Demonstrated Longevity
- Available Electric Backup
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GARN® WHS Technical Specifications
There are three 2008 GARN® WHS Models.
| Model |
WHS 1500 |
WHS 2000 |
WHS 3200 |
| Width in Inches |
72" |
72" |
86" |
| Height in Inches |
75" |
75" |
93" |
| Overall Length in Inches |
111" |
135" |
172" |
| Recommended wood Length |
24"-32" |
24"-32" |
32"-48" |
| Weight Empty in Pounds |
3550 |
3980 |
7500 |
| Weight Filled in Pounds |
15,400 |
19,000 |
34,500 |
| Approx.Storage in Gallons |
1,420 |
1,825 |
3,200 |
| Firebox Length in Inches |
41" |
41" |
50" |
| Firebox Diameter in Inches |
25" |
25" |
40" |
| Btu's Stored (120°-200°) |
920,000 |
1,272,000 |
2,064,000 |
| Btu/hr Burn Rate* |
350,000 |
425,000 |
950,000 |
| Btu's/degree of Temp Rise |
11,500 |
15,900 |
25,800 |
*burn rate will vary with wood type, moisture content, and size
Sizing
To calculate your sizing requirements, you will need to know the Btu load of your building(s), the operating temperature of your heat delivery system, and estimate any heat transfer loss within your system.
The length of time between burns is the amount of storage available within your temperature range divided by the btu's per hour you need for heat. Your calculated Btu load will be the amount you need on your coldest days. Warmer days have a smaller effective load and will last much longer between burns.
Units may also be installed in tandem.
It is important to not undersize or oversize any heating appliance.
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