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CSA P.9-11 STANDARD CSA P.9 is a standard for combined space and water heating systems (combos).  It spells out the test set-ups, test procedures, and calculations for this standard and demonstrates the capacities, performance, energy consumption, and overall combo system efficiency. The P9 standard only applies to gas-fired or oil-fired combined space and water heating systems. It is catered to forced-air systems and does not include in-floor or radiator based hydronic heating. Combos have increasingly been installed in many varied applications to help with a variety of installation scenarios and problems. While the move to using combos was often clever and convenient, efficiency and performance was less than stellar. Many combos were not greater than the sum of its parts.  This is changing with the use of various technologies now available. Prior to the P9 Standard, the combined efficiency of the various components together could not be accessed with existing tests. Running a P9 test results in a third party laboratory verified value, the Thermal Performance Factor (TPF). This is not a certification process and does not guarantee the system is at all efficient. The higher the TPF score, the higher the efficiency.   Performance varies widely. Not all stakeholders publish their TPF score results for this reason. Although P9 testing is not required to install a combo, untested combo systems leave the end user with an unverified efficiency rating.  This differs from what is required in an ENERGY STAR home where NRCan has specified a minimum TPF ratings from a P9 tested system. NV Eco Vision’s advanced technology resulted in attaining the first recorded TPF of .95. NV ECO Vision has its own P9 simulation Lab. We are able to accurately predict a combo system’s TPF before proceeding to a third party lab for verification.  Although individual system components may have good efficiency ratings on their own, there is no guarantee that combining two components together result in an efficient system.
Combo Systems