Rheem Manufacturing Company (Montgomery, AL) has announced that its commercial, heavy-duty gas water heater now includes the G37-200, a 35-gal booster water heater available in natural gas and LP. The 199,999 Btuh G37-200 is specifically designed to minimize the difficulty of replacing failed booster water heaters and is versatile for new installation. Features include a thermal efficiency of 80%; a system sentinel; and a full port, full flow brass drain valve.