© 2021 NV ECO Vision Sales Inc.
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