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venting to long

JrII Member Posts: 3
Fell into job with many problems, Burnham Revolution Rv6 stainless venting rotting away from condenstation. Problem max venting legth is 55 ft., Venting now is 67ft. Thats with straits and elbows. Do i replace and in another 8-10 yrs replace it again which is totally wrong. Maybe move boiler closer to exterior wall?? Boiler has been in for 12yrs now. Taking suggestions seeing Burnham wont give any.


  • kcopp
    kcopp Member Posts: 4,443
    more info...

    needed. tell us more about the system.
  • unclejohn
    unclejohn Member Posts: 1,833
    Move boiler or

    Find a shorter way out. Max means max.
  • Bob Harper
    Bob Harper Member Posts: 1,040
    Listed instructions

    The boiler must be installed in accordance with the listed instructions. If the max. horizontal vent run is 50LF (per brochure), then you have to move the boiler regardless of venting material.

    Now, It appears this boiler has been approved for venting with PVC if you use their kit. I would recommend you look into polypropylene venting instead, which can take higher temps. and is listed to UL 1738.

    If the AL29-4c stainless steel is rotting out then what about the appliance? Has it been inspected? what do you have to trap and manage condensate?
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