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  1. #1
    Join Date
    Aug 2011
    Location
    EC Wisconsin
    Posts
    55

    Confused Vaillant oil boiler size?

    Hi all, found a bad F70-W-40PP, anyone know what size this is?
    thanks

  2. #2
    Join Date
    Aug 2012
    Location
    NE wisconsin
    Posts
    402
    Doesn't matter what size the old boiler is do your heat load calculations and know your putting in the correct size. Never trust that the person that put in the last system knew what they were doing.

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