Taco’s new SmartPlus circulator is designed for systems with dedicated hot water return lines. When set to “smart” mode, the SmartPlus circulator records each time hot water is called for during a seven-day period and then duplicates the pattern for the following week. It also can be set to “pulse” mode, where it will operate for 150 seconds every 10 minutes, maintaining hot water at all fixtures. The circulator will automatically enter “vacation” mode if hot water is not used for 36 hours. Water will be circulated once a week to prevent corrosion and scale buildup.www.taco-hvac.com.