The Alliance double wound helical coil heater features a compact footprint. Sizes 2.4 to 12 Million BTU/hr.
The original Hopkins design Volcanic Heaters are known as a leader in marine cargo heating. Volcanic heaters are "over built" for hard work on our nation's waterways.
The new Alliance heater has a double would helical coil featuring a 3-pass design resulting in higher efficiencies. The smaller size Alliance heaters can put out the same BTU's as a physically larger unit. THe on/off or fully modulated burners fire down the center of the coil. The hot gases return back between the coils to the front end plate and return to the back of the heater to exit out the flue.
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