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Non-DirectR•• • <br /> Room Air and External Termination Clearances <br /> © AIR SUPPLY INLET <br /> TERMINATION <br /> Inside <br /> corner detail V <br /> ❑ VENT TERMINAL <br /> Clearance in G <br /> Ref.Aalso Q ® AREA WHERE TERMINAL <br /> applies to - IS NOT PERMITTTED <br /> anticipated <br /> D snow line A L H <br /> �� SNOW <br /> 15ft <br /> b ��B B <br /> 3 B <br /> IC Fixed V <br /> Fixed V Operable dosed M <br /> closed B <br /> Operable }"- V <br /> F V ? <br /> B A 1 K <br /> -►IB <br /> Figure 38: Room Air and External Termination Clearances Regulator vent outlet <br /> Table 17 <br /> Canadian Installations' U.S.Installations2 <br /> (CSA B149.1) (ANSI Z223.1/NFPA 54) <br /> Ref Description Other than direct vent Other than direct vent <br /> (Outdoor unit and/or Room Air) (Outdoor unit and/or Room Air) <br /> A Clearance above grade,veranda, porch,deck,or balcony 12 in.(30 cm) 12 in.(30 cm) <br /> 4 ft(1.2 m)below or to side of opening; 1 ft <br /> B Clearance to window or door that may be opened 36 in.(91 cm) (300 mm)above opening <br /> C Clearance to permanently closed window <br /> D Vertical clearance to ventilated soffit,located above the terminal within <br /> a horizontal distance of 2 ft(61 cm)from the center line of the terminal <br /> E Clearance to unventilated soffit <br /> F Clearance to outside corner <br /> G Clearance to inside corner 12 in. <br /> H Clearance to each side of center line extended above meter/regulator 3 ft.(91 cm)within a height 15 ft. <br /> assembly (4.6 m) <br /> I Clearance to service regulator vent outlet 3 ft.(91 cm) <br /> J Clearance to non-mechanical air supply inlet to building or the 4 ft(1.2 m)below or to side of opening; 1 ft <br /> combustion air inlet to any other appliance 36 in.(91 cm) (300 mm)above opening <br /> 3 ft(91 cm)above if within 10 ft <br /> K Clearance to a mechanical air supply inlet 6 ft(1.83 m) (3 m)horizontally <br /> L Clearance above paved sidewalk or paved driveway located on public Vents for Category II and IV appliances <br /> property cannot be located above public walkways <br /> 7 ft(2.13 m)[1] or other areas where condensate or vapor <br /> can cause a nuisance or hazard. <br /> M Clearance under veranda,porch,deck,or balcony 12 in.(30 cm)[2] <br /> Notes: 'In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code. <br /> 'In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code. <br /> Clearance to opposite wall is 24 in.(60 cm). <br /> [1]A vent shall not terminate directly above a sidewalk or paved driveway that is *Clearances are in accordance with local installation codes and the <br /> located between two single family dwellings and serves both dwellings. requirements of the gas supplier. (Degagement conforme aux codes <br /> [2]Permitted only if veranda,porch,deck,or balcony is fully open on a minimum d'installation locaux et aux exigences du foumisseur de gaz.) <br /> of two sides beneath the floor. <br /> [3]If locally adopted installation codes specify clearances different than those <br /> illustrated,then the most stringent clearance shall prevail. <br /> Rinnai Tankless Water Heater Installation and Operation Manual 42 <br />