1625 VIRGINIA AVE 2016-11-15 - Laserfiche WebLink

j��5 �;��Y--� ,��- � 618.6 Return-air limitation. Return air from one dwelling unit shall not be discharged into another dwelliTzg unit. 618.7 (IFGS) Furnace plenums and air ducts. Where a fur- nace is installed so that supply ducts carry air circulated by the furnace to areas outside of the space containing the fur- nace, the return air shall also be handled by a duct(s) sealed to the furnace casing and ternunating outside of the space con- taining the furnace. SECTION 619 (IFGC) CONVERSION BURNERS 619.1 Conversion burners. The installation of conversion burners shall conform to ANSI Z21.8. SECTION 620 (IFGC) UNIT HEATERS G20.1 �etter�l. Unit heaters shall be tested in accordance with ANSI Z83.8 and shall be installed in accordance with the manufacturer's installation instructions. 620.2 Support. Suspended-type unit heaters shall be sup- ported by elements that are designed and constructed to accommodate the weight and dynamic loads. Hangers and brackets shall be of noncombustible material. 620.3 Ductwork. Ducts shall not be connected to a unit heater unless the heater is listed for such installation. 620.4 Clearance. Suspended-type unit heaters shall be instulled wiNl clearances to cni�aUr.�sliF�le u��rtc�r�ir�l.s of n��t Ics,s than 18 inches (457 nun) at the sides, 12 inches (305 mm) at the bottom and 6 inches (152 mm) above the top where the unit heater has an internal draft hood or 1 inch (25 mm) above the top of the sloping side of the vertical draft hood. Floor-mounted-type unit heaters shall be installed with clearances to co�nbustible �naterials at the back and one side only of not less than 6 inches (152 mm). Where the flue gases are vented harizontally, the 6-inch (152 mm) clearance shall be measured from the draft hood or vent instead of the rear wall of the unit heater. Floor-mounted-type unit heaters shall not be installed on combustible floors unless listed for such installation. Clearances for servicing all unit heaters shall be in accor- dance with the manufacturer's installation instructions. Exception: Unit heaters listed for reduced clearance shall be permitted to be installed with such clearances in accor- dance with their listing and the manufacturer's instruc- tions. 620.5 (IFGS) Installation in commercial garages and air- craft hangars. Unit heaters installed in garages for more than three motor vehicles or in aircraft hangars shall be installed in accordance with Sections 305.9, 305.10 and 305.11. SECTION 621 (IFGC) UNVENTED ROOM HEATERS 621.1 General. Unvented room heaters shall be tested in accordance with ANSI Z21.11.2 and shall be installed in SPECIFIC APPLIANCES accordance with the conditions of the listing and the manu- facturer's installation instructions. Unvented room heaters utilizing fuels other than fuel gas shall be regulated by the b2ternational Mechanical Code. 621.2 Prohibited use. One or more unvented room heaters shall not be used as the sole source of comfort heating in a dwelling unit. 621.3 Input rating. Unvented room heaters shall not have an input rating in excess of 40,000 Btu/h (11.7 kW). 621.4 Prohibited locations. Unvented room heaters shall not be installed within occupancies in Groups A, E and I. The Iocation of unvented room heaters shall also comply with Section 303.3. G2fl.5 gtc�c�rn or space v�lwne. '1'he aggregate input iating of all unvented appliances installed in a room or space shall not exceed 20 Btu/h per cubic foot (207 W/m') of volume of such room or space. Where the room or space in which the appli- ances are installed is directly connected Co another rooin or space by a doorway, archway or other opening of comparable size that cannot be closed, the volume of such adjacent room or space shall be pernutted to be included in the calculations. 621.6 Oxygen-depletion safety system. Unvented room heaters shall be equipped with an oxygen-depletion-sensitive safety shutoff system. The system shall shut off the gas sup- ply to the main and pilot burners when the oxygen in the sur- rounding atmosphere is depleted to the percent concentration specified by the manufacturer, but not lower than 18 percent. The system shall not incorporate field adjustment means cupable of changiub lhe sct poiiit aC whicli ll�c syste;m acLs lo shut off the gas supply to the room heater. 621.7 Unvented decorative room heaters. An unvented decorative room heater shall not be installed in a factory-built fireplace unless the fireplace system has been specifically tested, listed and labeled for such use in accordance with UL 127. 621.7.1 Ventless firebox enclosures. Ventless firebox enclosures used with unvented decorative room heaters shall be listed as complying with ANSI Z21.91. SECTION 622 (IFGC) VENTED ROOM HEATERS 622.1 General. Vented room heaters shall be tested in accor- dance with ANSI Z21.86/CSA 232, shall be designed and equipped as speciiied in Section 602.2 and shall be installed in accordance with the manufacturer's installation instruc- tions. SECTION 623 (IFGC) COOKING APPLIANCES 623.1 Cooking appliances. Cooking appliances that are designed for permanent installation, including ranges, ovens, stoves, broilers, grills, fryers, griddles, hot plates and barbe- cues, sha11 be tested in accordance with ANSI Z21.1, ANSI Z21.58 or ANSI Z83.11 and shall be installed in accordance with the manufacturer's installation instructions. 2012 INTERNATIONAL FUEL GAS CODE� �25