Chapter hvac engineering Fundamentals: Part 1 Introduction

10.4.4
Thermal liquid boilers
Thermal liquid boilers are of the water tube type, but instead of water,
a special thermal liquid is used. This liquid permits the generation of
high temperatures—600 to 800
⬚
F—at low pressures. These units are
often found in manufacturing facilities, with the thermal liquid used
in processes. Steam is generated through a heat exchanger for use in
space heating and other purposes. These boilers are prevalent in Eu-
rope but have seen limited application in the United States. Thermal
liquids are often elusive in containment. Special consideration must
be given to joint systems and device seals.
Equipment: Part 2
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