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a) Be sure that method selected for venting heater complies with all codes as required for each particular location. b) Exhaust end of heater will accept a four (4”) inch flue pipe using the flue pipe adapter. c) Heater may be vented to the outdoors either vertically or horizontally. d) If heater is to be vented horizontally: 1) Vent must exit building not less than seven (7’) feet above grade when located adjacent to public walkways. 2) Vent must terminate at least three (3’) feet above any forced air inlet located within ten feet (10’). 3)Vent must terminate at least four (4’) feet below, four (4’) feet horizontally from, or one (1’) foot above any door, window, or gravity inlet into any building. 4) Vent terminal shall be located at least twelve (12”) inches from any opening through which vent gases could enter the building. e) Vent terminal must be beyond any combustible overhang. f) If condensation in the flue is a problem, the flue length should be shortened or insulated. g) For vent specifications all of the following conditions must be met. 1) Maximum total vent length allowed in forty-five (45’) feet. 2) Maximum outside air supply duct allowed forty-five (45’) feet. 3) Maximum total vent length plus outside air supply length plus extension package shall not exceed sixty -five (65’) feet. 4) Under length conditions 1) through 3) above — a total of two (2) elbows are allowed for vent and outside air supply together. Subtract fifteen (15’) feet per additional elbow from maximum length allowed if more than two (2) elbows are used. Alternative Arrangements / Optional Equipment for Venting Unvented Operation a) Sufficient ventilation must be provided in the amount of 4 CFM per 1,000 BTU/hr. firing rate. b) Refer to ANSI Z223.1 - latest revision, NFPA-54 and local codes for additional information. c) Use of optional outside combustion air is not recommended with unvented heaters due to pressure considerations. Horizontal Venting a) In combustible or noncombustible walls, use Tjerblund VH1-4” (Stk. #19022). Follow vent manufacturer’s instructions for proper installation. (Alternative vent Enerco Stk. #19023). b) Four (4”) inch O.D. flue pipe is required. Thirty (30’) feet maximum length is recommended. Up to forty-five (45’) feet maximum may be used if insulated to prevent excess condensation. (See General Requirements on page 21 for additional information). c) All flue joints should be sealed using suitable product such as General Electric RTV106 or Permatex Form-A-Gasket Red High Temperature Silicone Adhesive Sealant. d) Vent terminal should be installed at a height sufficient to prevent blockage by snow. e) Building materials should be protected from degradation by flue gases. Vertical Venting a) Four (4”) inch O.D. flue pipe, maximum forty-five (45’) feet in length may be used as shown with approved vent cap. (See General Requirements on page 21 for additional information.) b) An insulated thimble may be required to pass through combustible structures (check local codes). c) All flue joints should be sealed using suitable products (see recommendation for horizontal venting.) Draft Hood Venting a) Refer to ANSI Z223.1 - latest revision, NFA-54 for heights and vent sizes recommended for proper venting. (Check local codes for additional information.) b) Minimum six (6”) inch O.D. vent is recommended. Common Venting a) Horizontal run to vent must never exceed 75% of the vertical height of the vent. Refer to ANSI Z223.1 - latest revision, NFA-54 for proper vent sizes and installation. b) Open area of common vent must equal the sum of the open area of individual vents connected to it. (See chart and diagrams - page 25.) c) Use double wall vent as required (check codes.) d) Heaters sharing a common vent must be controlled by the same thermostat. e) All joints must be sealed using suitable products (see recommendation for horizontal vent - page 24.) f) Connections to common stack must be positioned to avoid direct opposition between streams of combustion gases. Outside Air Supply a) See procedure and diagram on page ??. FIGURE 12: Unvented Operation 1) Ventilation equal to 4 CFM per 1,000 BTU/hr. firing rate must be provided in unvented heater installations. 2) For dimensions A “unvented” refer to (Figure 1 — Minimum Clearances to Combustibles.) FIGURE 13a: Single Wall Single wall vent run Single wall terminal end FIGURE 13b: Double Wall Double wall vent run and Double wall terminal end FIGURE 14: Vertical Venting 36” 36” A FIGURE 15: Common Roof Venting COMMON VENTING - (2) Heaters Model # H = 6 ft. H = 8 ft. H = 15 ft. ERXL-60 D = 7” D = 6” D = 6” ERXL-80 D = 8” D = 7” D = 6” ERXL-100 D = 8” D = 8” D = 7” ERXL-125 D = 10” D = 10” D = 8” ERXL-150 D = 10” D = 10” D = 8” ERXL-175 D = 10” D = 10”...

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