Preface 

This is the first edition of CSA P.9.1, Test method for determining the performance of combined hydronic space and water heating systems (combos). CSA acknowledges that the development of this Standard was made possible, in part, by the financial support of FortisBC, Natural Resources Canada (NRCan), and Efficiency Manitoba. This Standard was prepared by the Subcommittee on Efficiency of Combination Water Heating and Space Heating Systems (Combos), under the jurisdiction of the Technical Committee on Energy Efficiency and Related Performance of Fuel-Burning Appliances and Equipment and the Strategic Steering Committee on Performance, Energy Efficiency, and Renewables, and has been formally approved by this Technical Committee. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. 

Scope 

1.1 Introduction 

This Standard describes the test procedures, test set-ups, and calculations required to determine the performance, capacities, energy consumption, and overall efficiency of gas-fired and oil-fired combined radiant space and water heating systems (combos) with hydronic heat distribution. 

1.2 Type of standard 

This Standard establishes laboratory methods for testing and rating the thermal performance and electrical energy use of a combo using a consistent test set-up and the same ambient temperature and control settings for all function tests. 

1.3 Performance rating 

In this Standard, the performance of a combo is characterized by a thermal performance descriptor that consolidates measurements for space heating and water heating to provide an annual thermal performance rating, the thermal performance factor (TPF). The water heating load that is incorporated into the thermal performance rating is standardized and the space heating load used in the overall rating is based on the rated space heating capacity of the combo. 

1.4 Applicability 

This Standard applies to hydronic packaged combo systems and combo designs/configurations with heat inputs up to and including 87.9 kW (300 000 Btu/h) for boiler-based systems and a maximum input up to and including 73.2 kW (250 000 Btu/h) for water-heater-based systems that are intended for field assembly. The combo system, which is to be tested, is everything from the heat generator hydraulically to the radiant distribution manifold, including all pumps, controls, actuating valves, and mixing valves, all of which will be provided by the integrator in a kit. 

1.5 Types of combo systems covered 

The following categories of combo systems are covered in this Standard: Type A, Type B, and Type C systems. (See Clause 3for a definition of these systems). 

1.6 Combo systems not covered by this Standard 

This Standard does not apply to a) electric- and solar-based combo systems; b) solid-fuel-based combo systems; and c) multi-family dwellings with a central heating plant. 

1.7 Terminology 

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “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 Standard. 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. 

1.8 Units of measurement 

The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.