The Heat Transfer Products Munchkin is a discontinued fully modulating gas boiler with an efficiency of 90% AFUE. It featured a stainless steel heat exchanger for optimal heat transfer and resistance to corrosion, and its compact, lightweight design provided greater installation flexibility. An Inconel NIT burner and spark ignition assured reliable operation, while a self-diagnostic microprocessor control monitored the system and made servicing easier.
Later versions of the Munchkin boiler include the Munchkin R1 (Revision 1), featuring a digital display and upgraded burners, and the Munchkin R2 (Revision 2), which differed from previous units because of its wiring and metal latches.
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