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2 × OY-RD310LF/C units installed in October 2019 in Keshan, Heilongjiang — indoor held at 20–22°C, heating cost USD 4.23 per m².

12,000 m²                  Heated area (≈129,000 sq ft)
2 units                           Units installed
20–22 °C                      Indoor temperature
4.23 USD/m²              Heating cost

Project Profile

1. Background: heating as a necessity in the severe-cold zone

Keshan County, located in Qiqihar, Heilongjiang, sits in China's severe-cold climate zone. Winters are long and ambient temperatures run low, making building heating a winter-long necessity. The local heating tariff is set at USD 5.40 per m² for residential users and USD 6.10 per m² for non-residential users.

For a 12,000 m² public building, heating is both a comfort question and a cost question that runs across the entire heating season. Choosing the right heating source is therefore a practical, balance-sheet decision, not just an equipment purchase.

2. The solution: 2 dual-stage low-temperature screw heat pumps

The project heats an area of 12,000 m² with 2 single-machine dual-stage low-temperature screw heat pumps, installed model OY-RD310LF/C, with installation completed and units put into use in October 2019.

These units are designed for heating duties in northern China's severe-cold and cold regions, using a dual-stage compression with enhanced vapor injection approach to maintain stable heating output at low ambient temperatures (an industry-standard technical principle; operating parameters per unit nameplate and on-site measurement).

OY-RD series ultra-low-temperature screw heat pump (product image of the same series, OYRR-branded)

3. The temperature record: is it actually warm inside?

Since commissioning, the indoor temperature has been held steadily at 20–22°C. Under Keshan's severe-cold climate, maintaining a 12,000 m² building in this comfort range across the heating season is a direct test of a heat pump's low-ambient heating capacity.

4. The cost record: what does it cost per square meter?

With OYRR equipment in place, the project's heating cost came to USD 4.23 per m² — about USD 8 per m² below the residential tariff benchmark of USD 5.40 per m² (5.40 → 4.23).

Based on counts of past cold-weather days, the average annual heating cost is estimated at USD 24–27 per m². At USD 4.23 per m² over 12,000 m², one heating season costs roughly USD 50,700 (figures in USD, the local billing currency).

As unit technology and operation solutions keep advancing, this heating cost can be expected to go even lower in the future.

5. On-site partner organizations

As displayed on the site signage, organizations co-located/named at the site include (names as shown on site signs): the Black Soil Conservation Academician Workstation Demonstration Base, Heilongjiang Bayi Agricultural University, and the Heilongjiang Jiahesheng Potato Professional Cooperative, among others.

6. About OYRR

OYRR (Guangdong Ouya Refrigeration Equipment Manufacturing Co., Ltd.) manufactures refrigeration and heat pump equipment, with products exported to the Middle East, Southeast Asia and Latin America. The OY-RD series of ultra-low-temperature screw heat pumps is built for heating applications in northern China's severe-cold and cold regions.

Website: www.oyrrhvac.com

Product: OY-RD Series Ultra-Low-Temperature Screw Heat Pump

Positioning: a screw-type air-source heat pump line for heating in northern China's severe-cold/cold regions, using a single-machine dual-stage compression design for stable heating output at low ambient temperatures.

The installed model in this project is OY-RD310LF/C. Image: product photo of a similar screw-type low-temperature heat pump (OYRR-branded).

Heating Cost Comparison (all prices in USD)

Our heat pump saves 31% vs coal heating and 34% vs gas heating, with zero on-site emissions.

OYRR · Guangdong Ouya Refrigeration Equipment Manufacturing Co., Ltd.

Ultra-low-temperature screw heat pumps · heating solutions for severe-cold regions

Website: www.oyrrhvac.com

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