6ITEMS REQUIRED FOR INSTALLATIONEnsure that the following items are available before proceeding with installation:• External regulator (for propane/LPG only) • Manual cutoff valve• Piping which complies with local codes • Sediment trap• Pipe sealant approved for use with • Pipe wrenchpropane / LPG (resistant to sulfur compounds)ITEMS REQUIRED FOR INSTALLATIONCODESAdhere to all local codes or in their absence, the latest edition of THE NATIONAL FUEL GAS CODEANSIZ223.1 or NFPA54 which can be obtained from:American National Standards Institute, Inc. National Fire Protection Association, Inc.1430 Broadway or Batterymarch ParkNew York, NY 10018 Quincy, MA 02269WARNING Due to high temperatures, do not install the heater:• Where curtains, furniture, clothing or other flammable objects are less than42" from the front of the heater.• In high traffic areas.• In windy or drafty areas.DO NOT PLACE CLOTHING OF OTHER FLAMMABLE MATERIAL ON OR NEARTHE APPLIANCE.ADEQUATE COMBUSTION AND VENTILATION AIRThis heater shall not be installed in a confined space unless provisions are provided for adequate combus-tion and ventilation air.(a) Walls and ceiling exposed to the outside atmosphere have a continuous water vapor retardedwith a rating of 1 perm (6 x 10 kg per pa-sec-m²) or less with openings gasketed or sealed , and(b) Weather stripping has been added on openable windows and doors, and(c) Caulking or sealants are applied to areas such as joints around window and door frames,between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrationsfor plumbing, electrical, gas lines, and at other openings.The National Fuel Gas Code defines a confined space as a space whose volume is less than 50 cubic feetper 1,000 BTU per hour (4.8m³ per kw) of the aggregate input rating of all appliances installed in that spaceand an unconfined space is defined as a space whose volume is not less than 50 cubic feet per 1,000 BTUper hour (4.8m³ per kw) of the aggregate input rating of all appliances installed in that space. Roomscommunicating directly with the space in which the appliances are installed, through openings not fur-nished with doors, are considered a part of that unconfined space.11