Water Heater Brochure

• A hot water tap is opened causing
incoming potable water to flow through
the flat plate heat exchanger.
• Heated boiler water, supplied from the
fire tube heat exchanger, flows through a
diverter valve and into the flat plate heat
exchanger where it prioritizes heating the
incoming domestic water to the designated
set point temperature.
• The integrated boiler pump circulates boiler
water through the fire tube heat exchanger
to keep it at set point temperature.
• When there is a call for space heating, the
diverter valve directs the heated boiler
water into the external space heating loop.
With a 10:1 turndown ratio,
the ProLine
®
XE combi boiler
has the ability to modulate
combustion to maximize
efficiency and prevent short
cycling when there are small
heating demands.
Energy Conservation
The ProLine
®
XE combi boiler
combines space heating and
domestic hot water (DHW)
in one appliance, providing
a space saving choice for
builders and specifying
engineers.
Compact Size
ProLine
®
XE combi boiler
provides up to 74% more
heating capacity than other
combi boilers. For domestic
hot water (DHW), it is also
sized large enough to provide
2.6 gpm (110 model) to 4.8
gpm (199 model) at a 77°F
temperature rise.
More Hot Water
Domestic Hot Water and Space Heating
How it Works:
RESIDENTIAL COMBI BOILERS
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