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Choose Options Compare Quick view 18L49 18L4901 - OEM Lennox Armstrong Ducane Furnace Air Pressure Switch 0.45" As low as $40.99 This is a brand new OEM Lennox Armstrong Ducane upgraded Furnace Air Pressure Switch 0.45". It replaces the part numbers listed below.An air switch is safety designed to ensure that your inducer... As low as $40.99 Choose Options Compare Quick view
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Choose Options Compare Quick view 12M92 12M9201 - OEM Lennox Armstrong Ducane Furnace Air Pressure Switch 0.70" As low as $41.99 This is a brand new OEM Lennox Armstrong Ducane upgraded Furnace Air Pressure Switch 0.70". It replaces the part numbers listed below.An air switch is safety designed to ensure that your inducer... As low as $41.99 Choose Options Compare Quick view
