How much it costs to replace a Rheem tankless water heater in 2026 ranges from 2,000 to 4,500 dollars installed including unit, labor, venting, gas line modifications, and permit, depending on model and efficiency. For non-condensing Rheem RTG-64 6.4 GPM 140,000 BTU costs 1,200 to 1,600 dollars for unit plus installation labor of 800 to 1,500 dollars, total 2,000 to 3,000 dollars installed, using existing gas line and venting if same type. For mid-range condensing high efficiency Rheem RTGH-84 8.4 GPM 180,000 BTU costs 1,500 to 2,000 dollars for unit plus labor of 1,000 to 1,800 dollars, total 2,500 to 3,800 dollars installed, requiring PVC venting and condensate drain. For premium Rheem RTGH-95 9.5 GPM 199,000 BTU with built-in recirculation pump costs 1,800 to 2,400 dollars for unit plus labor of 1,200 to 2,000 dollars, total 3,000 to 4,500 dollars installed, plus recirculation line at 300 to 600 dollars. Additional costs include gas line upgrade to 3/4 inch at 300 to 600 dollars if existing is 1/2 inch because tankless needs high BTU, water softener at 500 to 2,000 dollars for hard water areas to prevent scaling, and permit at 50 to 150 dollars. Compared to tank water heater at 1,200 to 2,500 dollars installed, tankless costs 50 to 80 percent more but lasts 20 years versus 10 to 12 years for tank and saves 100 to 200 dollars per year in gas.
1 votes
Marked as accepted