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HVAC
NATE Core & Service Certification
Gas Heating Systems
Verificación de conocimientos
Gas Heating Systems
Verificación de conocimientos
Verificación de conocimientos
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What is the difference between the gas supply pressure and the manifold pressure on a residential furnace?
A
Supply pressure is measured in psig while manifold is measured in BTU/hr
B
Supply pressure (from the utility, typically 7 in. w.c.) is reduced by the gas valve regulator to the nameplate manifold pressure (typically 3.5 in. w.c.)
C
They are always equal; there is no pressure regulation inside the furnace
D
Manifold pressure is always higher than supply pressure
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