"Quick & Basic Hydronic Controls" covers what heating contractors need to know about circuits, relays switches, loads and power supplies. Author Carol Fey also wrote "Quick & Basic Electricity." The $14.95 book can be ordered by logging on to Dan Holohan's Web site, HeatingHelp.com or you can call Fey at 303/795-2679.
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Check out Plumbing & Mechanical's September 2017 issue, featuring our cover story on PHCC CONNECT 2017. Other features include the benefits of heat pump water heaters, preventing cockroach infestations with drain maintenance, and much more.