Duty Atmospheric and Direct Vent Gas Heaters
Double Duty Atmospheric and Direct Vent Gas units
heat water for domestic use and store it in a triple
tested, glass-lined storage tank. While in the tank,
this domestic hot water transfers heat to our Therma-Tube
heat exchanger surrounding the inside of the tank.
Within these tubes, water for space heating is circulated
and heated. This internal heat transfer allows the
Double Duty to serve two purposes. It provides hot
water for domestic use while maintaining a comfortable
space temperature via hydronic or radiant heating.
sharing heat for two purposes, efficiency is increased.
That means less energy is needed, which means more
money is saved.
heat exchanger - With the Therma-Tube anti-leakage
system heating fluid is separated from domestic water
by a double-wall tube using an internal leak path
to the exterior. Heating fluid is circulated in a
primary metallic inner tube. A secondary, thermally
stabilized, high-density polyethylene tube surrounds
the primary tube. Monofilament lines between the two
walls providing a positive leak path channel to the
outside of the unit.
Features and Benefits
appliance easily handles the job normally done by
Year Limited Warranty
annual operating cost
space saved for other purposes
Duty Residential Gas | Efficiency+