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37、 as “CSA Group”Prepared byApproved byTesting method for measuring annual fireplace efficiencyCAN/CSA-P.4.1-15(approved December 2015)National Standard of CanadaCAN/CSA-P.4.1-15 Testing method for measuring annual fireplace efficiencyApril 2015 2015 CSA Group 1ContentsTechnical Committee on Energy Ef
38、ficiency and Related Performance of Fuel-Burning Appliances and Equipment 4Subcommittee on Gas Fireplace Efficiency 8Preface 101 Scope 122 Reference publications 133 Definitions and symbols 133.1 Definitions 133.2 Symbols 164 Testing conditions 214.1 Installation of test unit 214.2 Flue and stack 21
39、4.2.1 Draft relief system gas fireplaces (excluding direct vent and power vent systems) 214.2.2 Direct vent gas fireplaces (see Annexes C and D) 214.2.3 Power vent gas fireplaces 224.2.4 Additional requirements for condensing gas fireplaces 224.3 Fuel supply 224.3.1 Natural gas 224.3.2 Propane gas 2
40、34.3.3 More than one test gas 234.3.4 Electrical supply 234.4 Burner adjustments 234.5 Circulating air adjustments 234.5.1 Fan-type vented gas fireplaces 234.5.2 Gravity-type vented gas fireplaces 244.6 Instrumentation 244.6.1 Pressure 244.6.2 Temperature 244.6.3 Electric power measurement 244.6.4 F
41、ossil fuels 244.6.5 Heating value 244.6.6 CO2 concentration 244.6.7 Tracer gas 244.7 Location of temperature-measuring instruments 254.7.1 Draft relief system fireplaces 254.7.2 Direct vent fireplaces 254.7.3 Power vent fireplaces 254.7.4 Condensing fireplaces 254.8 Combustion-measurement instrument
42、s 254.9 Room ambient temperature 25CAN/CSA-P.4.1-15 Testing method for measuring annual fireplace efficiencyApril 2015 2015 CSA Group 24.10 Equipment used to measure mass flow rate in flue and stack 264.11 Condensate collection 265 Testing and measurements 265.1 General 265.2 Updraft tests for all d
43、raft relief system fireplaces 265.2.1 Test requirement 265.2.2 Datum test 275.2.3 Updraft test 275.3 Steady-state testing 275.3.1 Set-up 275.3.2 Draft relief systems 285.3.3 Direct and power vent fireplaces 285.3.4 Fuel input rate 285.3.5 Flue gas CO2 measurements 285.3.6 Measurement of condensate u
44、nder steady-state conditions 285.3.7 Single-stage control 295.3.8 Other than single-stage control 295.4 Jacket loss measurement 295.5 Measurement of off-cycle sensible heat loss using the tracer gas method 295.5.1 Tracer gas injection 295.5.2 Measurement of tracer gas flow 295.5.3 Cool-down test 305
45、.6 Heat-up test 305.7 Pilot light measurement 305.8 Electric power consumption measurements 306 Calculations Annual fireplace efficiency for gas-fuelled vented fireplaces 316.1 Pilot fraction 326.2 Jacket loss 326.3 Latent heat loss 326.4 Ratio of combustion air mass flow rate to stoichiometric air
46、mass flow rate 326.5 Ratio of combustion and relief air mass flow rate to stoichiometric air mass flow rate 326.6 Sensible heat loss at steady-state operation 336.7 Steady-state corrections for condensation 336.7.1 Latent heat gain due to condensation under steady-state conditions 336.7.2 Steady-sta
47、te heat loss due to hot condensate going down the drain 346.8 Steady-state efficiency 356.8.1 All non-condensing fireplaces 356.8.2 Non-condensing fireplaces without single-stage controls 356.8.3 All condensing fireplaces 356.8.4 Condensing fireplaces without single-stage controls 356.9 Weighted-ave
48、rage steady-state efficiency 366.9.1 Fireplaces with single-stage controls 366.9.2 Appliances without single-stage controls 366.10 Average ratio of stack gas mass flow rate to flue gas mass flow rate at steady-state operation 366.11 Multiplication factors 376.11.1 Infiltration heat loss during burne
49、r on-cycle 37CAN/CSA-P.4.1-15 Testing method for measuring annual fireplace efficiencyApril 2015 2015 CSA Group 36.11.2 Sensible heat loss during burner on-cycle 376.12 On-cycle time constant 386.13 Ratio of average burner on-time per cycle to on-time cycle constant 396.14 Effective flue gas temperature difference at start-up 406.15 Fraction of heating load at reduced operating mode 406.16 On-cycle infiltration heat loss 416.17 On-cycle sensible heat loss 416.18 Off-cycle sensible heat loss 436.19 Off-cycle infiltration heat loss 456.20 Part-load cor
