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Rugged
All-Bronze
Headers
resist corrosion, and
are easily removed for
inspection or service.
Cast iron headers with
porcelainized
waterways are
available.
Finned Copper
Tube Heat
Exchanger
single bank, straight
through design
delivers lowest
pressure drop. Integral
fins have ten times the
heat transfer surface
of plain tubes.
Floating Return
Header
immunizes heat
exchanger to thermal
shock.
Stainless Steel
Burners
maintain precise
combustion at all
firing rates, burn
quietly and won’t clog
or corrode.
Interlocking
Refractory
Panels
with sealed corners
reduce radiation
losses.
Slide-out Burner
Tray
allows easy inspection
and service.
24-Volt Controls
are totally enclosed for
protection. Door is
easily removed for
inspection and service.
Corrosion
Resistant Steel
fittings are brush-
galvanized against
rust. Heat shields are
corrosion-resistant
steel. Jacket has
Polytuf powder coat
finish.
Combination
Modulating
Valves
automatically size
boiler to loads as low
as 20% of full input
for maximum fuel
economy. Standard on
Type NH boilers.
Optional on Type H
and WH.
Raytherm
TM
Atmospheric
Spark-to-Pilot
Ignition
the most dependable
ignition method
available.
Indoor/outdoor
construction
Tube Sheet and
“O” Ring
Construction
eliminates the repair
and maintenance
problems associated
with rolling tubes
directly into a casting.