SCOP = Seasonal Coefficient of Performance (Seasonal COP)
In the USA, air-to-water heat pumps are rated & certified under AHRI 590/590 As such, there is no HSPF (HSPF is the seasonal average heating COP). Confusingly, HSPF is expressed as an "EER" meaning BTU/W whereas COP is generally expressed as W/W. USA air to water heat pump manufacturers generally give a heating rating at full speed performance at each outdoor temperature, and may publish a seasonal average COP generated from internal testing. and simply publish their own inhouse testing or calculated estimates.
However, in Europe, heat pump manufacturers are required to test full heating performance including seasonal average heating performance under EN14825 and to publish officially certified data showing the seasonal average COP, called the SCOP. SCOP is the same as HSPF, in a kW/kW format.
At Chiltrix, while waiting for the USA standards to catch up with the 21st century we submitted the CX50 to a European lab (TUV) in order to have the heating performance tested and officially certified to the European EN14825 standard. Chiltrix has received an official European SCOP Certification. Our customers can know for sure what the real heating performance and seasonal average heating performance looks like when officially tested and certified.
As you might expect from Chiltrix, we did very well, scoring the highest rating possible, A+++ with a SCOP of 4.55.
Per ASHRAE 90.1 the conversion factor between HSPF and SCOP is 3.412 (HSPF = 3.412 × SCOP). In the USA, the HSPF is officially rated and published based on Climate Zone 4. The IEC EN14825 test conditions are slightly colder than Climate Zone 4 making the IEC test a more than fair comparison.
To convert SCOP (kW/kW) to HSPF (BTU/kW) the Chiltrix HSPF would be equivalent to HSPF 15.52 (4.55*3.412).
So although there is no official HSPF under AHRI 550/590 at this time, you can be sure from official TUV testing & certification that Chiltrix has extraordinary heating capability with the highest possible efficiency rating.
More information about EN14825 here. More information about HSPF here. |
More Reading:
https://www.psehealthyenergy.org/wp-content/uploads/2017/09/HeatPumps.pdf
