mm) dia. flue pipe (3 per ly with spring spacer connection) N 4. r 1 II 6-7/8" (173mm) dia. air intake Wall Thimble 2 pieces (10" (254mm Outer Diameter) Termination Cap Screws (4 per connection) Regency Horizon"' HZ40E Gas Fireplace EFTA00301453 INSTALLATION UNIT INSTALLATION WITH VERTICAL