Required clearance, between multiple flues.

Discussion in 'HVAC Heating & Cooling' started by lahabra, May 14, 2009.

  1. lahabra

    lahabra New Member

    Messages:
    50
    Location:
    California
    Required clearance, between multiple flues.

    Is it “ok†to vent a water heater and 2 gas Furnaces through a roof side by side? The vents would be Spaced about 3’ apart from each other? One would be gravity and the second would be Induced type “Bâ€, and the third would be Induced “PVCâ€.
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,059
    Location:
    New England
    Each manufacturer will have very specific directions in their installation manual about proximity of air intake to other (and their own) exhaust plus a relationship to operable windows and other obstructions. You need to consult those manuals for specific instructions.
  3. lahabra

    lahabra New Member

    Messages:
    50
    Location:
    California
    Yes the instructions are quite specific. It says: “Must be vented in accordance with ANSI Z223.1â€
  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,059
    Location:
    New England
    Most I've dealt with have numerous pictures and drawings in the installation manual (not in the owner's manual) describing the do's and don'ts. Haven't tried searching for that spec...it might be on-line.
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