Lennox HM30 Furnace
Overview of HM30
Before being discontinued, the Lennox HM30 furnace was part of the Lennox Complete Heat System: a high-efficiency system for heating both water and rooms. The HM30 is the water heating module that can be installed with the AM30 air module as a close-coupled unit or separately as a remote unit.
The Complete Heat System is built with a stainless steel heat exchanger inside its water storage tank. It heats the surrounding water to the programmed temperature, and that hot water can then be diverted for use throughout the house. The other half of the Complete Heat System involves the AM30 water circulating pump. The AM30 pulls water from the HM30 heating module into the aluminum and copper space heating coil. The coil absorbs heat from the water and then warms the air forced over it by a blower. The warm air is then circulated through the home via ductwork. Meanwhile, water is returned to the HM30 for reheating.
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Consumer Reviews of the HM30
For residential applications, the Complete Home System comes with a 5-year warranty on parts, and the water tank is covered for 10 years. For non-residential applications, a 1-year warranty applies for parts and the compressor is covered for 5 years.