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Manafacture: Lennox Hearth File size: 4.94 mb File name: Lennox_Hearth_SSDVST_SSDVPF_Installation_700031M.pdf Language of manual:

This distance may be decreased to 2” (51mm) for non-- combustible exterior sidewalls only, if the SV4.5HT-2 termination is used. NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS VVVVVFCFixed Closed Window Operable Window B B A B H M I = Area where Termination is not Permitted= Air Supply Inlet X = Vent Termination V D V 3 ft. 3 ft. A A A = 9” in U.S. = 12” in Canada VL B J X V A G Inside Corner Detail BC C C *18” Ventilated Soffit Horizontal Termination Detail D Exterior Wall 6” Inside Corner * See Item D in the Text Below. V P V O N N Q NOTE: Local Codes Or Regulations May Require Different Clearances. NOTE: Location Of The Vent Termination Must Not Interfere With Access To The Electrical Service. E K X ...... Minimum Clearances Canadian Installation * US Installation ** A = Clearance above grade, veranda, porch, deck or balcony. 12 inches (30 cm) * 12 inches (30 cm) ** B = Clearance to window or door that may be opened. 6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW), 12 in. (30 cm) for appliances > 10,000 BTU/hr (3kW) and < 100,000 BTU/hr (30kW), 36 inches (91 cm) for appliances > 100,000 BTU/hr (30kW)* 6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW), 9 in. (23 cm) for appliances > 10,000 BTU/hr (3kW) and < 50,000 BTU/hr (15kW), 12 inches (30 cm) for appliances > 50,000 BTU/hr (15kW)* C = Clearance to permanently closed window 12 inches (305 mm) recommended to prevent window condensation 9 inches (229 mm) recommended to prevent window condensation D = Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 18 in. (458 mm) from the center line of the terminal 18 inches (458 mm) 18 inches (458 mm) E = Clearance to unventilated soffit 12 inches (30 cm) 12 inches (30 cm) F = Clearance to outside corner 5 inches (12.7 cm) 5 inches (12.7 cm) G = Clearance to inside corner 2 inches (5.08cm) minimum - SV4.5HT-2 • 2 inches (5.08cm) minimum - SV4.5HT-2 • H = Clearance to each inside of center line extended above meter / regulator assembly 3 feet (91 cm) within a height of 15 feet above the meter / regulator assembly * 3 feet (91 cm) within a height of 15 feet above the meter / regulator assembly ** I = Clearance to service regulator vent outlet 3 feet (91 cm) * 3 feet (91 cm) ** J = Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance 6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW), 12 in. (30 cm) for appliances > 10,000 BTU/hr (3kW) and < 100,000 BTU/hr (30kW), 36 inches (91 cm) for appliances > 100,000 BTU/hr (30kW)* 6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW), 9 in. (23 cm) for appliances > 10,000 BTU/hr (3kW) and < 50,000 BTU/hr (15kW), 12 inches (30 cm) for appliances > 50,000 BTU/hr (15kW)* K = Clearance to mechanical air supply inlet 6 feet (1.8 meters) * 3 feet (91 cm) above, if within 10 feet (3 m) horizontally** L = Clearance above paved sidewalk or paved driveway located on public property 7 feet (2.13 m) ‡ 7 feet (2.13 m) ‡ M = Clearance under veranda, porch, deck or balcony 12 in. (30 cm) * ‡ 12 in. (30 cm) ** ‡ N = Depth of Alcove (Maximum 6 feet (1.83m) * 6 feet (1.83m) ** O = Clearance to Termination (Alcove) 6 inches (15.2mm)* 6 inches (15.2mm)** P = Width of Alcove (Minimum) 3 feet (91cm)* 3 feet (91cm)** Q = Clearance to Combustible Above (Alcove) 18 inches (457mm)* 18 inches (457mm)** * In accordance with the current CSA-B149.1 National Gas and B149.2 Propane Installation Code - Latest Editions. ** In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Codes - Latest Edition. ‡ A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings. *‡ Only permitted if veranda, porch, deck or balcony is fully open on a minimum 2 sides beneath the floor. Figure 6 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. MINIMUM CLEARANCES TO COMBUSTIBLES MINIMUM CLEARANCES TO COMBUSTIBLES Wall Finishes / Surrounds / Mantels Note: Combustible wall finish materials and/or surround materials must not be allowed to encroach the area defined by the appliance front and back faces (black sheet metal). Never allow combustible materials to be positioned in front of or overlapping the appliance front and back faces. See Figure 59 on Page 31. Non-combustible materials, such as surrounds and other appliance trim, may be installed on the appliance front and back faces with the following exception: If the optional radiant panels are installed, the non-combustible material may cover any portion of the top radiant panel or the air gaps surrounding the top radiant panel down to the top edge of eyebrow hood. The material must NOT cover any portion of the glass door or louvered panels. Vertical installation clearances to combustible mantels vary according to the depth of the mantel. See Figure 7. Mantels constructed of non-combustible materials may be ins...

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