Heat Output Ranges This manual describes the installation and operation of the GARN® Models: WHS-1000H, WHS-1000V, WHS-1500H, WHS-1500V, WHS-2000H and WHS-2000V wood heaters. Under specific test conditions these heaters have been shown to deliver heat at rates in the following ranges:
Model
Minimum Heat Rate (BTUH)
Maximum Rated Heat Rate (BTUH)*
GARN® WHS-1000 GARN® WHS-1500 GARN® WHS-2000 GARN® WHS-3200
0 0 0 0
160,000 177,000 200,000
450,000 * Maximum reloading once every 4 hours with 24 inch long split hardwood, with 23% moisture content
Efficiency Efficiency was determined using ASTM E2618-13. There are 2 different heating values: Lower Heating Value (LHV) and Higher Heating Value (HHV). The HHV efficiency must be used when comparing to efficiencies of non- solid fuel heating equipment (i.e. propane, natural gas, fuel oil). The LHV efficiency must be used when comparing to other solid fuel heating equipment (i.e. wood, coal, pellets).
8-Hour Average Efficiency
Annual Efficiency Rating*
Model
LHV
HHV
LHV
HHV
GARN® WHS-1000 GARN® WHS-1500 GARN® WHS-2000 GARN® WHS-3200
87 73 82
81 68 76
83 70 79
77 65 74
Not Tested
Not Tested
Not Tested
Not Tested
* Annual Efficiency Rating is equivalent to the Annual Fuel Usage Efficiency (AFUE).
Using properly seasoned wood versus high moisture fuels will ensure optimum efficiency and prevent creosote build-up in the heat exchanger and flue. Efficiencies for GARN® equipment were tested with wood having an average moisture content of 23%. For every increase in 5% of the moisture content of the fuel, the efficiency of the heater will be reduced by 2%:
Moisture Content Adjustment to Listed Efficiency 23% N/A – As tested +5% (28%) - 2 % +10% (33%) - 4 % +15% (38%) - 6 % +20% (43%) - 8%
Tamper Warnings This wood heater has a manufacturer-set minimum low burn rate that must not be altered. It is against federal regulations to alter this setting or otherwise operate this wood heater in a manner inconsistent with operating instructions in this manual.
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GARN® WHS 1000 and WHS 2000 Manual | © HY-C® Company LLC | October 2024
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