C Series Firetube

C Series Firetube

The C Series is fully packaged and designed to provide maximum energy efficiency at minimum cost. This is a great economical selection for a retrofit or upgrade of an existing boiler room.

Design Firetube
Heat Exchanger 3 Pass
Standard Design Pressure Steam: 15 psi/30 psi
Standard Design Pressure Water: 30 psi/60 psi
Burner Customer Preference
Fuel Gas/Oil/Propane
Venting Forced Draft
Heating Surface- Sq Ft 5.0
Low Pressure Water Coil Yes
DOE/AHRI Status Certified

America’s Boiler Company
The Burnham Commercial C Series compact packaged boiler was designed using our years of boiler experience and is sold and serviced through the largest and most experienced network of sales representatives in the country. With a complete commercial product offering and unmatched sales and technical support, it’s no wonder why we are America’s Boiler Company!

Packaged Boilers that Fit Through a Door
The C Series Firetube boiler is fully packaged and designed to provide maximum cost and energy efficiency. The C Series boiler fits through any standard 36” x 80” doorway, eliminating the need for any costly building alterations or difficult site assemblies. This convenient size allows for easier and less expensive retrofit or upgrade of an existing boiler room.

A forced-draft unit, the C Series avoids the expense of a tall stack and is much more economical to operate and install than atmospheric-fired boilers. The forced draft creates a more controlled combustion, and a more thorough mixture of fuel and air is achieved resulting in optimum efficiency.

Other design features help maintain this durability and economy over the years. While the original efficiency of some other boilers can decrease when outer wrappers develop air leaks and tubes cannot be cleaned thoroughly, the C Series overcomes these problems. Built to ASME standards, its outer shell of heavy welded steel boilerplate and extra heavy tube sheets assure the continued airtight conditions necessary for efficient combustion. Opening the front flue door allows convenient access to the firetubes. By brushing out all of the firetubes, the original efficiency of the boiler is restored in a matter of minutes. All tube ends are rolled in accordance with the ASME code and are inspected for hydraulic tightness by an independent insurance inspector, prior to shipping.

These installation, operation and maintenance features add up to real savings for you. Factory testing assures you that the boiler will deliver clean, quiet and reliable heat from the day it’s installed.

Standard Equipment


Three-pass firetube type, constructed with heavy steel, in accordance with requirements of the ASME Code. All units are registered with the The National Board of Boiler and Pressure Vessels.

Water cooled sidewalls in the rear turnaround promote rapid internal circulation and reduce gas temperatures at the entrance to the second pass, reducing tube end stress. All tube ends are rolled and flared.

Easy-opening insulated front and rear flue doors with light weight non-refractory closure provide full access to all tubes. No elaborate seals are used. The C Series oversized furnace easily accommodates any burner.

Washouts are provided for easy inspection and cleaning of waterside surfaces. All steam boilers are provided with a dry pan to ensure dry steam. A feedwater diffuser is provided on steam boilers. All water boilers are equipped with a dip tube at supply outlet and diffuser at return inlet.

The round vertical smoke outlet has room for an optional quadrant damper. All boilers are provided with lifting holes and an enameled steel jacket installed over fiberglass insulation. The boiler is mounted on a heavy-duty structural steel base with extended skid and burner platform for protection of the burner during shipment and rigging.

Standard Trim and Controls:

Steam: 157 pump control/low water cut-off with alarm contacts-piped with quick opening blowoff valve. Gauge glass set with hand-operated gauge and try cocks. Steam pressure gauge – 4-1/2″ dial. L404F operating pressuretrol, L4079B manual reset high limit pressuretrol and appropriate firing rate control when required. Manual reset probe auxiliary low water cutoff. ASME side outlet safety valve(s).

Water: 750-MT manual reset low water cut-off-piped with quick opening blowoff valve. Combination pressure/temperature gauge – 3-1/2″ dial. L4006A operating aquastat and L4006E manual reset high limit aquastat and appropriate firing rate control when required.

ASME side outlet relief valve(s).


Burnham Commercial, America’s Boiler Company is pleased to announce that the popular C-Series product line has been expanded to include four new, larger sizes. The new sizes 125, 150, 175 and 200 horsepower models are available for immediate order. To request a copy of the C-Series brochure, go to the Burnham Commercial website: https://www.burnhamcommercial.com/contact or contact your local Burnham Commercial sales representative. Electronic copies are also available by request or online at www.burnhamcommercial.com.