Dettson HGRC - Page 13

TABLE 5
Natural gas
TABLE 6
Propane gas
Input Minimum Output USGPM Pressure Recovery
Input at 20°F loss rate
(Btu/h) (Btu/h) (Btu/h) delta T (ft. of water) (USGPH)
HGRC068 58,000 N/A 46,400 4.7 0.5 48.7
HGRC105 87,000 43,500 69,600 7.1 0.5 73.1
HGRC136 116,000 58,000 92,800 9.4 0.5 97.5
HGRC170 145,000 72,500 116,000 11.8 0.5 121.8
HGRC204 174,000 87,000 139,200 14.1 0.5 146.2
HGRC238 203,000 101,500 162,400 16.5 0.6 170.6
HGRC272 232,000 116,000 185,600 18.9 0.7 194.9
HGRC306 261,000 130,500 208,800 21.2 0.8 219.3
HGRC340 290,000 145,000 232,000 23.6 0.9 243.7
Model
Notes: - In high altitude (2,000 to 4,500 feet), apply a 10% reduction on input, min. input, output and USGPH.
- The recovery rates (USGPH) are applicable only on water heaters.
14
Input Minimum Output USGPM Pressure Recovery
Input at 20°F loss rate
(Btu/h) (Btu/h) (Btu/h) delta T (ft. of water) (USGPH)
HGRC068 68,000 N/A 54,400 5.5 0.5 57.1
HGRC105 102,000 51,000 81,600 8.3 0.5 85.7
HGRC136 136,000 68,000 108,800 11.1 0.5 114.2
HGRC170 170,000 85,000 136,000 13.8 0.5 142.9
HGRC204 204,000 102,000 163,200 16.6 0.5 171.5
HGRC238 238,000 119,000 190,400 19.3 0.6 200.0
HGRC272 272,000 136,000 217,600 22.1 0.7 228.6
HGRC306 306,000 153,000 244,800 24.9 0.8 257.1
HGRC340 340,000 170,000 272,000 27.7 0.9 285.7
Model
Notes: -In high altitude (2,000 to 4,500 feet), apply a 10% reduction on input, min. input, output and USGPH.
-The recovery rates (USGPH) are applicable only on water heaters.