Regency ® P121-2/P121LC-2/P121RC-2/P131-2 Zero Clearance Direct Vent Gas Fireplace18Option V HA) 1' (305mm) Minimum 3' (914mm) MaximumB) 2' (610mm) Minimum 6' (1.86m) MaximumC) 3' (914mm) Minimum 9' (2.7m) MaximumD) 4' (1.22m) Minimum 12' (3.6m) MaximumE) 5' (1.5m) Minimum 15' (4.5m) MaximumF) 6' (1.86m) Minimum 17' (5.1m) MaximumWith the above options, maximum total pipe length if 37 feetwith minimum of 6 feet total vertical and maximum 17 feet totalhorizontal.Please note minimum 1 foot between 90o elbows is required.INSTALLATIONRIGID PIPE VENTING ARRANGEMENTSHORIZONTAL TERMINATIONSREGENCY DIRECT VENT SYSTEM (FLEX) (Propane & Natural Gas)The diagram below shows examples of horizontal termination arrangements using one, two, or three 90o elbows (two 45 o elbows equal one 90 oelbow).Note:1) A maximum of three 90 o elbows are permitted.2) Minimum distance between elbows is 1 ft. (305mm).• Maintain clearances to combustibles as listed in the "Clearances" section.• Horizontal vent must be supported every 3 feet.• Firestops are required at each floor level and whenever passing through a wall.• Must use optional rigid pipe adaptor (Part# 510-994) when using rigid pipe vent systems.• A vent guard should be used whenever the termination is lower than the specified minimum or as per local codes.Straight Out Horizontal Venting Horizontal Venting with One (1) 90 o ElbowDiagram 1Diagram 2Please note the minimum centerline forbasic install shown above.All Rigid Pipe Systems4" inner diameter6-5/8" outer diameter