Ohio Administrative Code › Title 4101:8 - Board of Building Standards: Residential Code of Ohio › Chapter 4101:8-18 - Chimneys and Vents › Section 4101:8-18-01 - Chimneys and vents

Current through all regulations passed and filed through July 1, 2024
[Comment: When a reference is made
	 within this rule to a federal statutory provision, an industry consensus
	 standard, or any other technical publication, the specific date and title of
	 the publication as well as the name and address of the promulgating agency are
	 listed in rule
	 4101:8-44-01
	 of the Administrative Code. The application of the referenced standards shall
	 be limited and as prescribed in section 102.5 of rule
	 4101:8-1-01 of the
	 Administrative Code.]
SECTION
  1801
GENERAL
1801.1
Venting
  required.
Fuel-burning appliances shall be
  vented to the outdoors in accordance with their listing and label and
  manufacturer's installation instructions except appliances listed and labeled
  for unvented use. Venting systems shall consist of approved chimneys or vents,
  or venting assemblies that are integral parts of labeled appliances. Gas-fired
  appliances shall be vented in accordance with Chapter 24.
This section should not be construed as
	 permitting the installation of portable unvented heaters in locations otherwise
	 prohibited by section
	 3701.82 of the Revised Code or
	 rules adopted by the state fire marshal pursuant to
	 3701.82 of the Revised
	 Code.
1801.2
Draft requirements.
A venting system shall satisfy the draft requirements
  of the appliance in accordance with the manufacturer's installation
  instructions, and shall be constructed and installed to develop a positive flow
  to convey combustion products to the outside atmosphere.
1801.3
Existing
  chimneys and vents.
Where an appliance is
  permanently disconnected from an existing chimney or vent, or where an
  appliance is connected to an existing chimney or vent during the process of a
  new installation, the chimney or vent shall comply with Sections 1801.3.1
  through 1801.3.4.
1801.3.1
Size.
The chimney or
  vent shall be resized as necessary to control flue gas condensation in the
  interior of the chimney or vent and to provide the appliance, or appliances
  served, with the required draft. For the venting of oil-fired appliances to
  masonry chimneys, the resizing shall be done in accordance with NFPA
  31.
1801.3.2
Flue passageways.
The
  flue gas passageway shall be free of obstructions and combustible deposits and
  shall be cleaned if previously used for venting a solid or liquid fuel-burning
  appliance or fireplace. The flue liner, chimney inner wall or vent inner wall
  shall be continuous and free of cracks, gaps, perforations, or other damage or
  deterioration that would allow the escape of combustion products, including
  gases, moisture and creosote.
1801.3.3
Cleanout.
Masonry
  chimneys shall be provided with a cleanout opening complying with Section
  1003.17.
1801.3.4
Clearances.
Chimneys
  and vents shall have airspace clearance to combustibles in accordance with this
  code and the chimney or vent manufacturer's installation instructions.
Exception:
Masonry chimneys equipped with a chimney lining system
	 tested and listed for installation in chimneys in contact with combustibles in
	 accordance with UL 1777, and installed in accordance with the manufacturer's
	 instructions, shall not be required to have a clearance between combustible
	 materials and exterior surfaces of the masonry chimney. Noncombustible fire
	 stopping shall be provided in accordance with this code.
1801.4
Space around lining.
The space surrounding a flue lining system or other vent
  installed within a masonry chimney shall not be used to vent any other
  appliance. This shall not prevent the installation of a separate flue lining in
  accordance with the manufacturer's installation instructions and this
  code.
1801.5
Mechanical draft systems.
A mechanical draft system shall be used only with
  appliances listed and labeled for such use. Provisions shall be made to prevent
  the flow of fuel to the equipment when the draft system is not operating.
  Forced draft systems and portions of induced draft systems under positive
  pressure during operation shall be designed and installed to prevent leakage of
  flue gases into a building.
1801.6
Direct-vent appliances.
Direct-vent appliances shall be installed in accordance with
  the manufacturer's instructions.
1801.7
Support.
Venting
  systems shall be adequately supported for the weight of the material
  used.
1801.8
Duct penetrations.
Chimneys, vents and vent connectors shall not extend into or
  through supply and return air ducts or plenums.
1801.9
Fireblocking.
Vent and
  chimney installations shall be fireblocked in accordance with Section
  602.8.
1801.10
Unused openings.
Unused
  openings in any venting system shall be closed or capped.
1801.11
Multiple-appliance venting systems.
Two or more listed and labeled appliances connected to
  a common natural draft venting system shall comply with the following
  requirements:
1.
										Appliances that are connected to common venting systems
  shall be located on the same floor of the dwelling.
Exception:
Engineered systems as provided for in Section
	 2427.
2.
										Inlets to common venting systems shall be offset such
  that no portion of an inlet is opposite another inlet.
3.
										Connectors serving
  appliances operating under a natural draft shall not be connected to any
  portion of a mechanical draft system operating under positive
  pressure.
1801.12
Multiple solid fuel prohibited.
A solid fuel-burning appliance or fireplace shall not
  connect to a chimney passageway venting another
  appliance.