Section 675IAC15-2-72. Definitions for heating, cooling, and fuel-burning systems

   The following definitions are common to the provisions of 675 IAC 15-2-71─675 IAC 15-2-87.

  "Accessible" means having access to a fixture, connection, appliance or equipment, but which may require the removal of an access panel, door or similar obstruction without removing permanent construction.

  "Air duct" means conduits or passageways for conveying air to or from heating, cooling, air conditioning or ventilation equipment, but not including the plenum.

  "Automatic pump (oil lifter)" means a pump, not an integral part of the oil-burning appliance, that automatically pumps oil from the supply tank and delivers the oil by gravity under a constant head to an oil-burning appliance.

  "British thermal unit (BTU)" means the quantity of heat required to raise the temperature of one (1) pound of water one (1) degree Fahrenheit.

  "BTU/H" means british thermal units per hour.

  "Burner" means a device for the final conveyance of fuel or a mixture of fuel and air to the combustion zone.

  "Class 0 air ducts" means ducts of materials and connectors having a fire-hazard classification of zero.

  "Class 1 air ducts" means ducts of materials and connectors having a flame-spread rating of not over twenty-five (25) without evidence of continued progressive combustion and a smoke-developed rating of not over fifty (50).*

  "Class 2 air ducts" means ducts of materials and connectors having a flame-spread rating of not over fifty (50) without evidence of continued progressive combustion and a smoke-developed rating of not over fifty (50) for the inside surface and not over one hundred (100) for the outside surface.*

*Flame-spread and smoke developed ratings are measured as specified in the Indiana Flammable and Combustible Liquids and Gases Code (675 IAC 22-1).

  "Clearance" means the distance between the appliance, chimney, vent, chimney or vent connector or plenum and the nearest surface.

  "Connector-gas appliance" means a flexible or semi-rigid connector listed as required by the Indiana Mechanical Code (675 IAC 18-1 [675 IAC 18-1 was repealed filed Oct 28, 1988, 3:00 p.m.: 12 IR 588, eff Jan 2, 1989. See 675 IAC 18-1.3.]) and used to convey fuel gas, three feet (3ʹ) or less in length (six feet (6ʹ) or less for gas ranges), between a gas outlet and a gas appliance in the same room with the outlet.

  "Factory-built fireplace" means a hearth, fire chamber and chimney assembly composed of listed factory-built components assembled in accordance with the terms of listing to form a complete fireplace.

  "Fireplace stove" means a chimney connected solid fuel-burning stove having listed part of its fire chamber open to the room.

  "Fuel gas piping system" means the arrangement of piping, tubing, fittings, connectors, valves and devices designed and intended to supply or control the flow of fuel oil to the appliance(s).

  "Gas clothes dryer" means a device used to dry wet laundry by means of heat derived from the combustion of fuel gases. Dryer classifications are as follows:

(1) Type 1. Factory-built package, multiple produced. Primarily used in family living environment. May or may not be coin-operated for public use. Usually the smallest unit physically and in function output.

(2) Type 2. Factory-built package, multiple produced. Used in business with direct intercourse of the function with the public. May or may not be operated by public or hired attendant. May or may not be coin-operated. Not designed for use in individual family living environment. May be small, medium, or large in relative size.

  "Gas refrigerator" means a gas-burning appliance which is designed to extract heat from a suitable chamber.

  "Gas supply connection" means the terminal end or connection to which a gas supply connector is attached.

  "Gas supply connector" means tubing or piping connecting the mobile structure to the gas supply source.

  "Gas vents" means factory-built vent piping and vent fittings listed by an approved testing agency, that are assembled and used in accordance with the terms of their listings, for conveying flue gases to the outside atmosphere.

(1) Type B Gas Vent. A gas vent for venting gas appliances with draft hoods and other gas appliances listed for use with Type B Gas Vent.

(2) Type BW Gas Vent. A gas vent for venting listed gas-fired vented wall furnaces.

  "Heat producing appliance" means all heating and cooking appliances and all fuel burning appliances.

  "Heating appliance" means an appliance for comfort heating of a mobile structure or for water heating.

  "Liquefied petroleum gases", "LPG" and "LP-gas" as used in this code shall mean and include any material which is composed predominantly of any of the following hydrocarbons, or mixtures of them: propane, propulene, butanes (normal butane or isobutane), and butylenes.

  "Plenum" means an air compartment which is part of an air-distributing system, to which one (1) or more ducts are connected.

(1) Furnace supply plenum is a plenum attached directly to, or an integral part of, the air supply outlet of the furnace.

(2) Furnace return plenum is a plenum attached directly to, or an integral part of, the return inlet of the furnace.

  "Quick-disconnect device" means a hand-operated device which provides a means for connection gas systems and which is equipped with an automatic means to shut off the gas supply when the device is disconnected.

  "Readily accessible" means having direct access without the necessity of removing any panel, door, or similar obstruction.

  "Roof jack" means that portion of a mobile structure heater flue or vent assembly, including the cap, insulation means, flashing, and ceiling plate, located in and above the roof cavity of a mobile structure.

  "Sealed combustion system appliance" means an appliance which by its inherent design is constructed so that all air supplied for combustion, the combustion system of the appliance, and all products of combustion are completely isolated from the atmosphere of the space in which it is installed.

  "Water heater" means an appliance for heating water for domestic purposes other than for space heating. (Fire Prevention and Building Safety Commission; 675 IAC 15-2-72; filed Mar 25, 1986, 1:44 pm: 9 IR 2002, eff Jun 15, 1986; readopted filed Nov 29, 2001, 12:21 p.m.: 25 IR 1306; readopted filed Sep 21, 2007, 9:20 a.m.: 20071010-IR-675070388RFA; readopted filed Oct 10, 2007, 9:16 a.m: 20071031-IR-675070388RFA; readopted filed Aug 4, 2011, 8:35 a.m.: 20110831-IR-675110254RFA)