Publication

AC/HP Test Methods 2.0: Phase 4 Findings Summary

4E TCP has developed a new test procedure to better reflect the benefits of dynamic load control, beyond a test which locks the fans and compressors at a fixed speed. This report provides the results of a round-robin testing across multiple international laboratories to evaluate the reproducibility and representativeness of this new Test Method for AC/HP products.

The key takeaways on the new 4E TCP test method:

  • has high reproducibility. Comparing results from lab to lab, the coefficients of variance were below 10% in all but one test condition for one unit.
  • is more representative than locked controls tests. The 4E Test Method highlights differences in efficiency when compared to locked-controls testing.
  • has a higher test burden than locked controls tests; though a virtual building load can help improve the stability of units, which will likely also reduce test time and further improve reproducibility