1.1
This Code sets out the minimum provisions for the installation, extension, alteration, and renewal of
hydronic heating systems.
1.2
This Code applies to open and closed hydronic heating systems. These systems include
a) hydronic space heating;
b) radiant heating (wall, floor, ceiling);
c) convectors;
d) fan coils;
e) combination potable water heating and space heating (combo) systems;
f) integrated mechanical systems;
g) indirect-fired domestic water heating;
h) pool and spa heating;
i) snow and ice melt systems; and
j) other auxiliary systems.
1.3
The terms “pipe” and “piping”, as well as “tube” and tubing”, are used interchangeably in this Code,
unless otherwise stated.
1.4
In this Code, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy
in order to comply with the Code; “should” is used to express a recommendation or that which is
advised but not required; and “may” is used to express an option or that which is permissible within the
limits of the Code.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a
note accompanying a clause is to separate from the text explanatory or informative material.
Notes to tables and figures are considered part of the table or figure and may be written as
requirements.
Annexes are designated normative (mandatory) or informative (non-mandatory) to define their
application.
1.5
The values given in SI units are the units of record for the purposes of this Code. The values given in
parentheses are for information and comparison only.