The Lennox Pulse is a discontinued gas furnace with an AFUE of up to 95.5%. The unit had an automotive-type spark plug ignitor used on the initial cycle only, which helped save energy, and worked on the pulse principle, meaning it did not require a pilot burner, main burners, conventional flue or chimney. It could be vented through a side wall or room and was designed to be installed in a utility room, closet, crawl space or attic. The unit’s heat exchanger was constructed of cast iron for greater heat transfer, and the heavy-gauge steel cabinet featured a layer of thick fiberglass insulation over the heat exchanger section for increased efficiency and reduced operating sound.
In the mid-1990’s there was a large recall of Pulse furnaces due to serious leaks in the heat exchangers.
Questions about this model?