Series 4F

The Series 4F is a compact boiler that fits where other designs of similar capacity cannot. It’s perfect as the heart of almost any system as it requires no tall expensive stack.

The Versatile Boiler
The Burnham 4F Forced Draft Steel Firebox Generator is a consistent sales leader in the heating industry, for reasons that make solid sense.

4F Saves on Installation
It is a compact boiler that fits where other designs of similar capacity cannot. Available for 15 psi steam and 30 or 60 psi water*, the 4F can serve perfectly as the heart of almost any system. As it is forced-draft fired, no tall, expensive stack is required. And because it is a factory-assembled, packaged unit, expensive jobsite time and labor are reduced.

*60 psi water boiler available in sizes 4F-63 through 4F-993.

4F Saves in Operation
The furnace surrounds the flame with highly-efficient waterbacked primary heat-absorbing surfaces. This large combustion chamber is easy to fire, accommodating many forced-draft burners without flame impingement or other critical firing problems. Forced-draft firing makes the 4F inherently more efficient than boilers using outmoded atmospheric burners, and gives you a feature that atmospheric units cannot offer: the option of burning gas or oil. A dual-fired burner allows you to burn the more economical fuel or the most readily available fuel at the flip of a switch, and affords you leverage in negotiating fuel prices.

The 4F is an economical heat source, whether used singly or in multiples. In fact, 4F's with modulating burners may be sequenced to operate in a step-fired system more cost effectively than a large number of residential-sized boilers when ongoing maintenance costs are considered.

4F Saves on Maintenance
The 4F is easy to clean and maintain, requiring no special tools, materials, or skills. Opening the front flue door allows firetubes to be brushed out quickly unlike the watertubes used in some boilers, which can be virtually impossible to clean. There are no elaborate or expensive proprietary seals required to reclose the doors as with some boilers. And, as the 4F is a wetback boiler, there is no delicate or expensive rear refractory to maintain as with some dryback boilers. Since 1873, Burnham has been engineering and building quality products that have made their own reputation. You can be confident that your 4F will perform efficiently and dependably, year after year.

Highlights

• Compact, efficient three-pass firebox design.
• No tall or costly stack required.
• Forced-draft firing with oil (No. 2,4,5, or 6), gas, or combination gas/oil.
• 15 PSI steam, 30 or 60 PSI water.
• Ample firebox assures non-critical combustion, high efficiency.

Benefits

• Forced-draft firing with oil (No. 2,4,5, or 6), gas, or combination gas oil
• High efficiency three-pass design
• Available for 15 psi steam and 30 or 60 psi water*
• Factory assembled
• Ideal for modular applications when in a tight installation area
• Easy to clean and maintain—requiring no special tools,materials, or skills
• Elaborate or expensive proprietary seals are not required to re-close the doors as with some boilers
• ASME code construction