To advance and standardize government procurement of energy-saving products, the 23rd issue of the "Energy-Saving Products Government Procurement List" has recently been issued to all ministries and commissions.

It is noteworthy that this issue of the list already has a dedicated option for "low-temperature air-source heat pump heating units."

In this issue of the list, 77 enterprises are shortlisted for "low-temperature air-source heat pump heating units," and 65 enterprises are shortlisted for "air-source heat pump water heaters for commercial or industrial and similar purposes."

I. Shortlisted enterprises for "low-temperature air-source heat pump heating units"

The standards implemented for low-temperature air-source heat pumps are: "GB/T25127.1-2010 Low ambient temperature air-source heat pump (chilled water) units—Part 1: Heat pump (chilled water) units for industrial or commercial and similar purposes" and "GB/T25127.2-2010 Low ambient temperature air-source heat pump (chilled water) units—Part 2: Heat pump (chilled water) units for household and similar purposes."

Coal-to-electricity units belong to the household type, and their product standard is the above-mentioned GB/T25127.2-2010.

II. Shortlisted enterprises for "air-source heat pump water heaters for commercial or industrial and similar purposes"

Heat pump water heaters implement two national standards: "GBT23137-2008 Household and similar heat pump water heaters" and "GB21362-2008 Heat pump water heaters for commercial or industrial and similar purposes."

The design conditions for heat pump water heaters are dry-bulb 20℃, inlet and outlet water temperature 15-55℃, and maximum water temperature 60℃ or other.

Water heaters are designed considering hot water heating throughout the year, with an average ambient temperature of 20℃, while the above-mentioned low-temperature air-source heat pump heating units are designed according to the national standard for heat pump water chillers and under an ambient temperature condition of 7℃.

It is worth mentioning that reports say that in the 2018 government tenders for the northern coal-to-electricity program, being shortlisted in the "Energy-Saving Products Government Procurement List" will be used as a threshold; therefore, the number of shortlisted enterprises in both categories in this issue is a new high for all previous issues.