Rheem RTG-84DVLP Direct Vent Indoor Propane Tankless Water Heater Residential Tankless Water Heaters - Rheem tankless gas water heaters offer you the perfect solution to heat your water at home. Imagine never running out of hot water again. Rheem provides to you innovative, new tankless products that provide a continuous supply of hot water from energy efficient and space saving design units. Specifications - 8.4 gal./min. at 35A-Degree F rise max. - 6.6 gal./min. at 45A-Degree F rise : - New. 3"/5" Concentric Vent System with Integrated Condensate Collector - Connects to Metal Fab Inc.