IRC09def3

CONTROL

A manual or automatic device designed to regulate the gas, air, water or electrical supply to, or operation of, a mechanical system.

LOG LIGHTER, GAS-FIRED

A manually operated solid-fuel ignition appliance for installation in a vented solid-fuel-burning fireplace.

DAMPER

A manually or automatically controlled device to regulate draft or the rate of flow of air or combustion gases.

BRAZING

A metal joining process wherein coalescence is produced by the use of a nonferrous filler metal having a melting point above 1,000ºF (538ºC), but lower than that of the base metal being joined. The filler material is distributed between the closely fitted surfaces of the joint by capillary action.

JOINT, FLARED

A metal-to-metal compression joint in which a conical spread is made on the end of a tube that is compressed by a flare nut against a mating flare.

FUEL GAS

A natural gas, manufactured gas, liquefied petroleum gas or mixtures of these gases.

DRAFT HOOD

A nonadjustable device built into an appliance, or made as part of the vent connector from an appliance, that is designed to (1) provide for ready escape of the flue gases from the appliance in the event of no draft, backdraft, or stoppage beyond the draft hood, (2) prevent a backdraft from entering the appliance, and (3) neutralize the effect of stack action of the chimney or gas vent upon operation of the appliance

FLUE GASES

Products of combustion plus excess air in appliance flues or heat exchangers.

CONNECTOR, APPLIANCE (Fuel)

Rigid metallic pipe and fittings, semirigid metallic tubing and fittings or a listed and labeled device that connects an appliance to the gas piping system.

FUEL GAS UTILIZATION EQUIPMENT

See "Appliance."

HOUSE PIPING

See "Piping system."

LIVING SPACE

Space within a dwelling unit utilized for living, sleeping, eating, cooking, bathing, washing and sanitation purposes.

FLUE COLLAR

That portion of an appliance designed for the attachment of a draft hood, vent connector or venting system.

CUBIC FOOT

The amount of gas that occupies 1 cubic foot (0.02832 m3) when at a temperature of 60ºF (16ºC), saturated with water vapor and under a pressure equivalent to that of 30 inches of mercury (101 kPa).

DRIP

The container placed at a low point in a system of piping to collect condensate and from which the condensate is removable.

DESIGN FLOOD ELEVATION

The elevation of the "design flood," including wave height, relative to the datum specified on the community's legally designated flood hazard map.

FLOOD HAZARD AREA

The greater of the following two areas: 1. The area within a floodplain subject to a 1 percent or greater chance of flooding in any given year. 2. This area designated as a flood hazard area on a community's flood hazard map, or otherwise legally designated.

METER

The instrument installed to measure the volume of gas delivered through it.

CONDENSATE

The liquid that condenses from a gas (including flue gas) caused by a reduction in temperature or increase in pressure.

DEMAND

The maximum amount of gas input required per unit of time, usually expressed in cubic feet per hour, or Btu /h (1 Btu /h = 0.2931 W).

CLEARANCE

The minimum distance through air measured between the heat-producing surface of the mechanical appliance , device or equipment and the surface of the combustible material or assembly.

CODE OFFICIAL

The officer or other designated authority charged with the administration and enforcement of this code , or a duly authorized representative.

FLUE, APPLIANCE

The passage(s) within an appliance through which combustion products pass from the combustion chamber of the appliance to the draft hood inlet opening on an appliance equipped with a draft hood or to the outlet of the appliance on an appliance not equipped with a draft hood.

CONNECTOR, CHIMNEY OR VENT

The pipe that connects an appliance to a chimney or vent.

OUTLET

The point at which a gas-fired appliance connects to the gas piping system.

COMBUSTION CHAMBER

The portion of an appliance within which combustion occurs.

DRAFT - Natural draft

The pressure difference created by a vent or chimney because of its height, and the temperature difference between the flue gases and the atmosphere.

DRAFT - Mechanical or induced draft

The pressure difference created by the action of a fan, blower or ejector that is located between the appliance and the chimney or vent termination.

DRAFT

The pressure difference existing between the appliance or any component part and the atmosphere, that causes a continuous flow of air and products of combustion through the gas passages of the appliance to the atmosphere.

ATMOSPHERIC PRESSURE

The pressure of the weight of air and water vapor on the surface of the earth, approximately 14.7 pounds per square inch (psia) (101 kPa absolute) at sea level.

CODE

These regulations, subsequent amendments thereto, or any emergency rule or regulation that the administrative authority having jurisdiction has lawfully adopted.

PIPING

Where used in this code, "piping" refers to either pipe or tubing, or both.

BAROMETRIC DRAFT REGULATOR

A balanced damper device attached to a chimney, vent connector, breeching or flue gas manifold to protect combustion appliances by controlling chimney draft. A double-acting barometric draft regulator is one whose balancing damper is free to move in either direction to protect combustion appliances from both excessive draft and backdraft.

AIR-HANDLING UNIT

A blower or fan used for the purpose of distributing supply air to a room, space or area.

BOILER, LOW-PRESSURE - Hot water heating boiler

A boiler in which no steam is generated, from which hot water is circulated for heating purposes and then returned to the boiler, and that operates at water pressures not exceeding 160 psig (1100 kPa gauge) and at water temperatures not exceeding 250ºF (121ºC) at or near the boiler outlet.

BOILER, LOW-PRESSURE - Steam heating boiler

A boiler in which steam is generated and that operates at a steam pressure not exceeding 15 psig (100 kPa gauge).

BOILER, LOW-PRESSURE - Hot water supply boiler

A boiler, completely filled with water, which furnishes hot water to be used externally to itself, and that operates at water pressures not exceeding 160 psig (1100 kPa gauge) and at water temperatures not exceeding 250ºF (121ºC) at or near the boiler outlet.

BURNER - Power

A burner in which gas, air or both are supplied at pressures exceeding, for gas, the line pressure, and for air, atmospheric pressure, with this added pressure being applied at the burner.

BURNER - Induced-draft.

A burner that depends on draft induced by a fan that is an integral part of the appliance and is located downstream from the burner.

ALTERATION

A change in a system that involves an extension, addition or change to the arrangement, type or purpose of the original installation.

OFFSET (VENT)

A combination of approved bends that make two changes in direction bringing one section of the vent out of line, but into a line parallel with the other section.

FLOOR FURNACE

A completely self-contained furnace suspended from the floor of the space being heated, taking air for combustion from outside such space and with means for observing flames and lighting the appliance from such space.

FURNACE

A completely self-contained heating unit that is designed to supply heated air to spaces remote from or adjacent to the appliance location.

BONDING JUMPER

A conductor installed to electrically connect metallic gas piping to the grounding electrode system.

BURNER

A device for the final conveyance of the gas, or a mixture of gas and air, to the combustion zone.

MAIN BURNER

A device or group of devices essentially forming an integral unit for the final conveyance of gas or a mixture of gas and air to the combustion zone, and on which combustion takes place to accomplish the function for which the appliance is designed.

DRAFT REGULATOR

A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value.

FLAME SAFEGUARD

A device that will automatically shut off the fuel supply to a main burner or group of burners when the means of ignition of such burners becomes inoperative, and when flame failure occurs on the burner or group of burners.

CHIMNEY - Masonry chimney

A field-constructed chimney composed of solid masonry units, bricks, stones or concrete.

FIREPLACE

A fire chamber and hearth constructed of noncombustible material for use with solid fuels and provided with a chimney.

FIREPLACE - Factory-built fireplace

A fireplace composed of listed factory-built components assembled in accordance with the terms of listing to form the completed fireplace.

IGNITION SOURCE

A flame spark or hot surface capable of igniting flammable vapors or fumes. Such sources include appliance burners, burner ignitors and electrical switching devices.

AIR CONDITIONING, GAS FIRED

A gas-burning, automatically operated appliance for supplying cooled and/or dehumidified air or chilled liquid.

JOINT, MECHANICAL

A general form of gas-tight joints obtained by the joining of metal parts through a positive-holding mechanical construction, such as flanged joint, threaded joint, flared joint or compression joint.

FIREPLACE - Masonry fireplace

A hearth and fire chamber of solid masonry units such as bricks, stones, listed masonry units or reinforced concrete, provided with a suitable chimney.

INFRARED RADIANT HEATER

A heater which directs a substantial amount of its energy output in the form of infrared radiant energy into the area to be heated. Such heaters are of either the vented or unvented type.

JOINT, PLASTIC ADHESIVE

A joint made in thermoset plastic piping by the use of an adhesive substance which forms a continuous bond between the mating surfaces without dissolving either one of them.

CHIMNEY - Factory-built chimney

A listed and labeled chimney composed of factory-made components, assembled in the field in accordance with manufacturer's instructions and the conditions of the listing.

CONCEALED LOCATION

A location that cannot be accessed without damaging permanent parts of the building structure or finish surface. Spaces above, below or behind readily removable panels or doors shall not be considered as concealed.

GAS CONVENIENCE OUTLET

A permanently mounted, manually operated device that provides the means for connecting an appliance to, and disconnecting an appliance from, the gas supply piping. The device includes an integral, manually operated valve with a nondisplaceable valve member and is designed so that disconnection of an appliance only occurs when the manually operated valve is in the closed position.

IGNITION PILOT

A pilot that operates during the lighting cycle and discontinues during main burner operation.

CHIMNEY

A primarily vertical structure containing one or more flues, for the purpose of carrying gaseous products of combustion and air from an appliance to the outside atmosphere.

PIPING - Pipe

A rigid conduit of iron, steel, copper, brass or plastic

FURNACE, CENTRAL FURNACE

A self-contained appliance for heating air by transfer of heat of combustion through metal to the air, and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location.

BOILER, LOW-PRESSURE

A self-contained gas-fired appliance for supplying steam or hot water.

DWELLING UNIT

A single unit providing complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation.

PILOT

A small flame that is utilized to ignite the gas at the main burner or burners.

OXYGEN DEPLETION SAFETY SHUTOFF SYSTEM (ODS)

A system designed to act to shut off the gas supply to the main and pilot burners if the oxygen in the surrounding atmosphere is reduced below a predetermined level.

FLUE LINER (LINING)

A system or material used to form the inside surface of a flue in a chimney or vent, for the purpose of protecting the surrounding structure from the effects of combustion products and for conveying combustion products without leakage to the atmosphere.

ANODELESS RISER

A transition assembly in which plastic piping is installed and terminated above ground outside of a building.

CONVERSION BURNER

A unit consisting of a burner and its controls for installation in an appliance originally utilizing another fuel.

DECORATIVE GAS APPLIANCES FOR INSTALLATION IN VENTED FIREPLACES

A vented appliance designed for installation within the fire chamber of a vented fireplace , wherein the primary function lies in the aesthetic effect of the flames.

DECORATIVE GAS APPLIANCE, VENTED

A vented appliance wherein the primary function lies in the aesthetic effect of the flames

DUCT FURNACE

A warm-air furnace normally installed in an air-distribution duct to supply warm air for heating. This definition shall apply only to a warm-air heating appliance that depends for air circulation on a blower not furnished as part of the furnace.

BTU

Abbreviation for British thermal unit, which is the quantity of heat required to raise the temperature of 1 pound (454 g) of water 1ºF (0.56ºC) (1 Btu = 1055 J).

APPROVED

Acceptable to the code official or other authority having jurisdiction.

AIR, EXHAUST

Air being removed from any space or piece of equipment or appliance and conveyed directly to the atmosphere by means of openings or ducts.

COMBUSTION AIR

Air necessary for complete combustion of a fuel, including theoretical air and excess air.

DILUTION AIR

Air that is introduced into a draft hood and is mixed with the flue gases.

AIR, MAKEUP

Air that is provided to replace air being exhausted.

FURNACE PLENUM

An air compartment or chamber to which one or more ducts are connected and which forms part of an air distribution system.

APPLIANCE, VENTED

An appliance designed and installed in such a manner that all of the products of combustion are conveyed directly from the appliance to the outside atmosphere through an approved chimney or vent system.

APPLIANCE, UNVENTED

An appliance designed or installed in such a manner that the products of combustion are not conveyed by a vent or chimney directly to the outside atmosphere.

APPLIANCE, FAN-ASSISTED COMBUSTION

An appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber or heat exchanger.

CLOTHES DRYER

An appliance used to dry wet laundry by means of heated air.

GAS PIPING

An installation of pipe, valves or fittings installed on a premises or in a building and utilized to convey fuel gas.

LEAK CHECK

An operation performed on a gas piping system to verify that the system does not leak.

APPLIANCE

Any apparatus or device that uses gas as a fuel or raw material to produce light, heat, power, refrigeration or air conditioning.

HAZARDOUS LOCATION

Any location considered to be a fire hazard for flammable vapors, dust, combustible fibers or other highly combustible substances. The location is not necessarily categorized in the International Building Code as a high-hazard use group classification.

EQUIPMENT

Apparatus and devices other than appliances.

APPLIANCE, AUTOMATICALLY CONTROLLED

Appliances equipped with an automatic burner ignition and safety shut-off device and other automatic devices, which accomplish complete turn-on and shut-off of the gas to the main burner or burners, and graduate the gas supply to the burner or burners, but do not affect complete shut-off of the gas.

DIRECT-VENT APPLIANCES

Appliances that are constructed and installed so that all air for combustion is derived directly from the outside atmosphere and all flue gases are discharged directly to the outside atmosphere.

COMBUSTION PRODUCTS

Constituents resulting from the combustion of a fuel with the oxygen of the air, including the inert gases, but excluding excess air.

CLOTHES DRYER - Type 1

Factory-built package, multiple production. Primarily used in the family living environment. Usually the smallest unit physically and in function output.

AUTOMATIC IGNITION

Ignition of gas at the burner(s) when the gas controlling device is turned on, including reignition if the flames on the burner(s) have been extinguished by means other than by the closing of the gas controlling device.

COMBUSTION

In the context of this code, refers to the rapid oxidation of fuel accompanied by the production of heat or heat and light.

LIQUEFIED PETROLEUM GAS or LPG (LP-GAS)

Liquefied petroleum gas composed predominately of propane, propylene, butanes or butylenes, or mixtures thereof that is gaseous under normal atmospheric conditions, but is capable of being liquefied under moderate pressure at normal temperatures.

EXTERIOR MASONRY CHIMNEYS

Masonry chimneys exposed to the outdoors on one or more sides below the roof line.

MODULATING

Modulating or throttling is the action of a control from its maximum to minimum position in either predetermined steps or increments of movement as caused by its actuating medium.

CONCEALED PIPING

Piping that is located in a concealed location (see "Concealed location").