Cholla_BobExplorerOct 07, 2016Suburban SF-30 to SF-35 Furnace UpgradeCan I replace a SF-30 30000 BTU Suburban furnace with a SF-35 35000 BTU unit? My SF-30 shook extremely last night and shutdown. Now cool air blows with no heat. Since its 5 years old, I am replacin...Show More
Old-BiscuitExplorer IIIOct 07, 2016Suburban Furnaces Service ManualSF-30 minimum vents is 3 (4")SF-35 minimum vents is 4 (4")
About DIY MaintenanceRV projects you can tackle on your own with a few friendly pointers.4,395 PostsLatest Activity: Nov 05, 2025
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