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    Sidewall venting (7 Posts)

  • Steve Steve @ 9:12 PM
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    Sidewall venting

    Just curious to see what local codes Call for in each Town or state
    Minimum distance from an openable window
    Here in New York City they Want 4' Which in most cases cannot be done
    I have a friend who works in Europe They only require 8 inches Where he works
    Big difference
    What is your local code
  • Tim McElwain Tim McElwain @ 10:09 PM
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    Here is what NFPA 54 says

    However you need to also follow manufacturers instructions as there are many other things with sidewalll venting which must be avoided.

    12.9* Through-the-Wall Vent Termination.


    12.9.1 A mechanical draft venting system shall terminate at least 3 ft (0.9 In) above any forced air inlet located within 10ft (3 m).

    Exception No.1: This provision shall not apply to the combustion air intake  of a direct vent appliance.
     
    Exceptions No.2: This provision shall not apply to the seperation of the integral outdoor air inlet and flue gas discharge of listed outdoor appliances.
     
    12.9.2 A mechanical draft venting system of other than direct vent type shall terminate at least 4 ft (1.2 m) below, 4 ft (1.2 m) horizontally from, or 1 ft (300 mm) above any door, operable window, or gravity air inlet into any building. The bottom of the vent terminal shall be located at least 12 in. (300 mm) above finished ground level.

    12.9.3 The vent terminal of a direct vent appliance with an input of 10,000 Btu/hr (3 kW) or less shall be located at least 6 in. (150 mm) from any air opening into a building, an appli­ance with an input over 10,000 Btu/hr (3 kW) but not over 50,000 Btu/hr (14.7 kW) shall be installed with a 9 in. (230 mm) vent termination clearance, and an appliance with an input over 50,000 Btu/hr (14.7 kW) shall have at least a 12 in. (300 mm) vent termination clearance. The bottom of the vent terminal and the air intake shall be located at least 12 in. (300 mm) above finished ground level.


    12.9.4 Through-the-wall vents for Category II and Category IV appliances and noncategorized condensing appliances shall not terminate over public walkways or over an area where condensate or vapor could create a nuisance or hazard or could be detrimen­tal to the operation of regulators, relief valves, or other equip­ment. Where local experience indicates that condensate is a problem with Category I and Category III appliances, this provi­sion shall also apply. Drains for condensate shall be installed in accordance with the manufacturer's installation instructions.


    12.9.5 Where vents, including those for direct-vent appli­ances or combustion air intake pipes, penetrate outside walls of buildings, the annular spaces around such penetrations shall be permanently sealed using approved materials to pre­vent entry of combustion products into the building.
  • Steve Steve @ 10:23 AM
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    Thanks Tim

    For the detailed response I should've mentioned the Manufactures instructions Must be followed
    But I was curious to see what other state laws are regarding the horizontal distance from an openable window. Most of the manuals show 12 inches. I seem to remember reading a recent post Where the poster stated their local law was 12 inches
  • Tim McElwain Tim McElwain @ 10:58 AM
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    That would be for

    direct vent only not mechanical exhausting.
  • Steamhead Steamhead @ 11:20 AM
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    No mention

    of clearance above the snow line?
    "Reducing our country's energy consumption, one system at a time"

    Steam, Vapor & Hot-Water Heating Specialists

    Oil & Gas Burner Service

    Baltimore, MD (USA) and consulting anywhere.
  • Tim McElwain Tim McElwain @ 2:57 PM
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    Height above snow line

    is really up to local jurisdictions because of the difference in snow accumulation. MY rule when I can control the installation is 30 inches above grade.
  • Steamhead Steamhead @ 3:17 PM
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    We've been known

    to get three feet of snow in Baltimore- so we won't go less than 48 inches above grade. If that's not available, we don't sidewall-vent, period. If someone else wants the liability, they're welcome to it.
    "Reducing our country's energy consumption, one system at a time"

    Steam, Vapor & Hot-Water Heating Specialists

    Oil & Gas Burner Service

    Baltimore, MD (USA) and consulting anywhere.
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