Installation & Operation Manual │ FTG104.0 GENERAL VENTINGThe FTG boiler is certified as a “Category IV” boiler requiring a “Special Venting System” designed forpressurized venting. The Exhaust Vent must be piped to the outdoors, using the vent materials and rules outlinedin this section. Under no conditions may this unit vent gases into a masonry chimney, unless it is vacant, andutilizes the approved venting material and rules described in this section.Vent and Air-inlet are to be piped separately. The FTG boiler cannot share a commonvent or air-inlet with multiple boilers. Failure to comply will result in serious injury ordeath.Direct Vent Installation (Best Practice)When installed as a Direct Vent boiler the combustion air-inlet must also be piped directly to the outdoors usingthe methods described in this section and in accordance with the National Fuel Gas Code, ANSI Z223.1 (U.S.) orCSA B149.1 (Canada) and local requirements.Installation Using Indoor Combustion AirWhen the installation uses Indoor Combustion Air (i.e. piping is not directly connecting the appliance air-inletfitting to the outdoors), provisions for combustion and ventilation air, in accordance with section “Air forCombustion and Ventilation,” of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 (U.S.), or Clause 8.2, 8.3or 8.4 of Natural Gas and Propane Installation Code, CAN/CSA B149.1 (Canada), or applicable provisions ofthe local building codes, must be adhered to.The boiler shall be located so as not to interfere with proper circulation of combustion,ventilation, and dilution air.Make up air requirements for the operation of exhaust fans, kitchen ventilation systems,clothes dryers, and fireplaces shall be considered in determining the adequacy of a spaceto provide combustion air requirements. Failure to ensure adequate make up air to allappliances may result in personal injury or death.Combustion Air-inlet ContaminationBe careful not to locate the air-inlet termination in an area where contaminants can be drawn in and used forcombustion. Combustion air containing dust, debris or air-borne contaminants will drastically increase therequired maintenance and may cause a corrosive reaction in the Heat Exchanger which could result in prematurefailure, fire, serious injury, or death. See Table 4-1 for a list of areas to avoid when terminating air-inlet piping:Table 4-1 Corrosive Products and Contaminant SourcesProducts to Avoid Contaminated Sources to AvoidAntistatic fabric softeners, bleaches, detergents, cleaners Laundry facilitiesPerchloroethylene (PCE), hydrocarbon based cleaners Dry cleaning facilitiesChemical fertilizer, herbicides/pesticides, dust, methane gas Farms or areas with livestock and manurePaint or varnish removers, cements or glues, sawdust Wood working or furniture refinishing shopsWater chlorination chemicals (chloride, fluoride) Swimming pools, hot tubsSolvents, cutting oils, fiberglass, cleaning solvents Auto body or metal working shopsRefrigerant charge with CFC or HCFC Refrigerant repair shopsPermanent wave solutions Beauty shopsFixer, hydrochloric acid (muriatic acid), bromide, iodine Photo labs, chemical / plastics processing plantsCement powder, crack fill dust, cellulose, fiber based insulation Concrete plant or construction siteDo not store or use gasoline or other flammable vapors and liquids in the vicinity of thisor any other boiler. Failure to follow instructions may result in serious injury or death.It is BEST PRACTICE to pipe the combustion air-inlet directly to the outdoors (DirectVent installation) to avoid contamination often contained in indoor air.