Raypak Indoor Stack Kit for R266 Heaters, 009839
Required If You Install The Heater Indoors or within A Structure of Any Type. Includes Adapter Plate Matched to 265/266/267 Specs. Connect From The Stack Top to Duct to The Outside. Follow All Instructions For Properly Venting Heater Exhaust. Pool Heaters Discharge Carbon Monoxide and Could Be Deadly If Improperly Installed or Maintained.