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1207.0 Heating Appliances and Equipment
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Heating appliances, equipment, safety and
operational controls shall be listed for its intended use in a
hydronic heating system and installed in accordance with the
manufacturer's installation instructions.
Boilers and their control systems shall comply
with Section 1002.0.
A condensing boiler,
in which the heat exchanger and venting system are
designed to operate with condensing flue gases, shall be
permitted to be connected directly to the panel heating
system without a protective mixing device.
Where the heat
exchanger and venting system are not designed to operate
with condensed flue gases, the boiler shall be permitted to
connect directly to the panel heating system where protected
from flue gas condensation. The operating temperature
of the boiler shall be more than the fluid temperature
in accordance with the manufacturer's instructions.
Water heaters used
for combined space- and water-heating applications shall be in
accordance with the standards referenced in Table 1203.2, and
shall be installed in accordance with the manufacturer's installation
instructions. Water used as the heat transfer fluid in the
hydronic heating system shall be isolated from the potable
water supply and distribution in accordance with Section
312.1, Section 1202.0, and Section 1218.0.
Where a combined
space- and water-heating application requires water
for space heating at temperatures exceeding 140°F
(60°C), a thermostatic mixing valve that is in accordance
with ASSE 1017 shall be installed to temper the water
supplied to the potable water distribution system to a temperature
of 140°F (60°C) or less.
Solar water heating
systems used in hydronic panel radiant heating systems
shall be installed in accordance with the Uniform Solar Energy
Code and Hydronics Code (USEHC).
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California Mechanical Code 2019 > 12 Hydronics > 1207.0 Heating Appliances and Equipment > 1207.2 Boilers
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California Mechanical Code 2016 > 12 Hydronics > 1207.0 Heating Appliances and Equipment > 1207.3 Dual-Purpose Water Heaters
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Water heaters used
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California Mechanical Code 2019 > 12 Hydronics > 1207.0 Heating Appliances and Equipment > 1207.3 Dual-Purpose Water Heaters