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S
ENTR
Y
®
High efficiency, cast-iron gas boiler
Cast-iron
heat
exchanger
Thermal pins
Metal
push nipples
Insulated
base
Integral
draft hood
(“S” models only)
Motorized
heavy-duty
vent damper
Insulated
jacket
Brand
name
controls
Long life
burners
Gas valve
Circulator pump
Relief valve
Blocked vent
safety switch
Not visible in photo
Pressure
temperature
gauge
Rollout safety switch
Highest standing
pilot AFUE
in the
industry.
There are 3 Sentry SX models
ranging in size from 150 to 210 MBh,
A.G.A. input. SX models include an external draft hood.