Testing a Dual Water- and Space-Heating System

A version of this article appears in the January/February 2008 issue of Home Energy Magazine.

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BY Roy H. Jensen

January 09, 2008

I tested a dual system for domestic hot water and space heating in a home where a furnace and ductwork were previously used for space heating.

A high-efficiency on-demand water heater can provide both domestic hot water and space heating at a fraction of the cost of a separate tank water heater and furnace.

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