SPECIFICATIONS GAS HEAT
Heat Input Type Standard Medium High
Number of Gas Heat Stages 2 2 2
Performance
Input - Btuh
Second Stage
Output - Btuh Second Stage
Minimum Air Volume - cfm
Gas Supply Connections 3/4 in. NPT 3/4 in. NPT 3/4 in. NPT.
Recommended Gas Supply Pressure - Nat. / LPG
Gas Supply Pressure Range
Min./Max. (LPG)
HIGH ALTITUDE DERATE
NOTE - Units may be installed at altitudes up to 2000 feet above sea level without any modications.
At altitudes above 2000 feet units must be derated to match gas manifold pressures shown in table below.
At altitudes above 4500 feet unit must be derated 2% (130K through 180K) and 4% (240K) for each 1000 feet
above sea level.
NOTE - This is the only permissible derate for these units.
Refer to the Installation Instructions for more detailed information.
Heat Input Type Altitude Feet
Gas Manifold Pressure
in. w.g.
Input Rate (Btuh)
Natural Gas LPG/ Propane
Standard (2 stage) 1.6 / 3.4
Medium (2 stage) 1.6 / 3.4
1.6 / 3.4
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