(B)BENEFITS(/B)(BR) Fewer wall penetrations than standard single-unit venting (BR) Reduced install cost with easy to install non-powered kits (BR) Flexibility of using PVC or polypropylene vent material (BR)(B)SPECIFICATIONS(/B) (BR) Approved for use with BTH 120, 150, 199, 250, 300, 400 and 500 Cyclone(R) models and BTHL 150, 199, 250, 300, 400 and 500 models (BR) Approved for side wall (horizontal) vent applications only (BR) 50 Feet maximum equivalent length of straight pipe common vent and elbows