Suburban NT Series Furnace Gasket 062164 (ducted models only) This Suburban furnace gasket works on the NT series Suburban furnaces as well as the P30S. This is only needed if the furnace is bottom ducted. Here are the NT series: NT-24 NT-30 NT-34S NT-24 NT-30SP NT-25 NT-30 NT-35K NT-24 NT-30 NT-34H... See More