Citadel, Available Now!
High efficiency commercial boilers and water heaters
offering twice the power in half the space now
available in 7 sizes!
High Eff. Gas Comm. Boiler or Water Heater Stainless
Steel Heat Exchanger High efficiency commercial
boilers and water heaters offering twice the power
in half the space…
now available at your distributor!
RANGE OF SIZES
Citadel: 399-1000 MBH
Citadel XL: 1250 & 1500 MBH
Small unit footprints, zero clearance (Citadel
Stackable/rack-able, doubles MBH/sq.ft.
3-in-1 vent connector (Citadel models), multiple
Up to 300′ of venting (Citadel XL models, 200′ for
Simplified wiring – separate low/high voltage boards
SIMPLIFIED SPECIFICATION & INSTALLATION
CSD-1 built-in (gas train & controls)
Advanced ConcertTM control system
Touchscreen with intuitive navigation and menus
Cascade up to 8 boilers
RELIABILITY & SERVICEABILITY
Commercial-grade water tube heat exchanger
Easy access to all boiler service areas
Complete control panel access: slide out (Citadel
models), external (Citadel XL models)
Product Date Sheet & Specifications
Technical Manuals & Information
U.S. Boiler Company is a leading manufacturer of
home heating equipment, water boilers, steam
boilers, hot water heaters, radiators and boiler