the 669 covers four horsepower ratings

reducing reliance on expensive emergency heat strips

Reduces diagnostic time by providing a complete

Proper ignitor positioning is critical for consistent furnace startup

and 05040ES series

Lennox 71W48 Orifice 319825-402 the 669 covers four horsepowerThe Lennox 71W48 Orifice is a precision engineered . 034 LP orifice designed for liquid propane conversion and flow regulation in specific Lennox heating units. As a vital component in the combustion string, this 0. 034 injector ensures the correct air to fuel ratio required for efficient burner performance. Heavy duty brass construction provides the necessary thermal resistance to withstand high temperature environments without deforming or