CGA P2 : 0

1. Purpose
2. Scope
3. Definitions
4. Classifications
5. Requirements
6. Instruments
    6.1 General
    6.2 Temperature
    6.3 Pressure
    6.4 Draft
    6.5 Combustion products
    6.6 Weight or volume (if oil supplied)
    6.7 Time
    6.8 Smoke
    6.9 Tracer gas mass flow rate
    6.10 Energy flow rate
    6.11 Higher heating value
7. Apparatus
    7.1 General
    7.2 Furnaces
    7.3 Gas, propane and oil-fuelled and electric low
          pressure steam and hot water boilers (including
          direct vent systems)
    7.4 Direct vent systems (stack insulation requirements)
    7.5 Thermocouple grids
    7.6 Electrical measurement
8. Methods of testing
    8.1 General
    8.2 Furnaces
    8.3 Boilers
    8.4 Test requirements or conditions
    8.5 Room ambient temperature (TRA)
    8.6 Jacket loss measurement
    8.7 Direct vent systems
    8.8 Methods of measurement for determining effectiveness
          factor (Do) of automatic stack damper
    8.9 Methods for determining draft factors Dp, Df and
          Ds, and off-cycle loss factor, Kl
9. Test procedure
    9.1 Steady-state test
    9.2 Flue temperature measurements cool-down test
    9.3 Flue gas temperature measurements - heat up test
    9.4 Direct measurement of condensate
    9.5 Direct measurement of off-cycle losses testing
          method
    9.6 Direct measurement of the S/F factor for oil-fuelled
          furnaces and boilers
    9.7 Optional test procedures for determining draft
          factors for Dp, Df, and Ds, for systems equipped
          with power burners or induced draft fans
    9.8 Optional test procedures for condensing furnaces and
          boilers which have no off-period flue losses
    9.9 Tracer gas test procedures
10. Date to be recorded
11. Calculations of derived results from test measurements
    11.1 Heating seasonal efficiency for electrical
          furnaces and boilers
    11.2 Heating seasonal efficiency gas, propane or oil
          furnaces and boilers
    11.3 Additional requirements for furnaces utilizing a
          stack (or flue damper)
    11.4 Additional requirements for furnaces utilizing
          indoor air for combustion and draft control
    11.5 Additional requirements for furnaces utilizing a
          direct vent system and condensing furnaces and
          boilers
    11.6 Additional requirements for furnaces and boilers
          which modulate or vary fuel input without
          controlling excess combustion air
    11.7 Additional requirements for atmospheric furnaces
          with integral draft diverter and equipped with an
          electro-mechanical device at the burner air inlet
          that restricts the flow through the heater
          exchanger in the off-cycle
    11.8 Modulating controls
    11.9 Annual fuel utilization efficiency
    11.10 National average number of burner operating hours
    11.11 Average fuel energy consumption for gas, propane
          or oil-fuelled furnaces or boilers
    11.12 Average annual auxiliary electrical energy
          consumption for gas, propane or oil fuelled
          furnaces or boilers
    11.13 Annual fuel utilization efficiency for electric
          furnaces and boilers
    11.14 Average annual electric energy consumption for
          electric furnaces or boilers
    11.15 Reserved
    11.16 Reserved
    11.17 Energy factor
Appendix A Formulas for functions F3, F4, F5, F6, F7, and F8

Gives the method of measuring annual fuel utilization efficiencies of residential furnaces and boilers.