Is Rheem a good tankless water heater brand?

Is Rheem a good tankless water heater brand, yes, Rheem is considered good mid-range tankless water heater brand offering good value, decent reliability, and wide availability at Home Depot. Rheem tankless water heaters including RTG-64 non-condensing 6.4 GPM and RTGH-84 and RTGH-95 high efficiency condensing 8.4 to 9.5 GPM offer up to 0.93 Uniform Energy Factor efficiency, which is good but slightly lower than best Navien at 0.95 UEF, with service call rates around 8 to 10 percent according to plumber surveys, which is higher than most reliable Rinnai at under 5 percent but lower than some budget brands at 12 to 15 percent, indicating good reliability. Key strengths that make Rheem good brand include lower upfront cost than Rinnai and Navien, for example RTGH-84 costs 1,500 to 2,000 dollars for unit versus Rinnai RUR160 at 1,800 to 2,400 dollars, wide availability at Home Depot and Lowe's with easy parts sourcing, 12-year heat exchanger warranty and 5-year parts warranty, and built-in recirculation option on RTGH-95 that eliminates cold water sandwich. Weaknesses include slightly higher noise at 55 decibels versus Rinnai at 50 decibels, and some complaints about scaling in hard water areas requiring descaling every 6 months. For homeowners wanting good value tankless with decent reliability and easy purchase at big box store, Rheem is good brand, lasting 20 years with proper descaling maintenance versus tank heater at 10 to 12 years.