SUPERMARKET REFRIGERATION
In larger stores, air handling units are the core of ventilation, conditioning and distributing air while often incorporating heating and cooling coils, humidifi ers and fi lters. Modern AHUs for retail frequently integrate high-effi ciency heat recovery, capturing and reusing energy from exhaust air. EC fans with variable speed drives allow modulation to actual demand, reducing waste. Increasingly, AHUs integrate R290 or CO₂ heat pumps, enabling simultaneous heating and cooling within one system. Installing effi cient equipment is only the fi rst step, though, as continuous optimisation is essential. Modern refrigeration and HVAC systems have advanced controls, but achieve the best results with regular monitoring and fi ne-tuning. Remote tools let technicians adjust compressor sequencing, setpoints and seasonal strategies. For example, changing compressor start-up so one reaches full capacity before a second starts can improve part-load effi ciency, lower energy use and stabilise temperatures. Data-driven optimisation extends to creating seasonal performance profi les for each store, considering local climate, occupancy and specifi c demands. This ensures systems are not only effi cient now but adaptable to future needs. Over time, proactive monitoring extends equipment life, reduces maintenance costs and supports compliance with tightening energy performance standards. Technology choices must balance environmental impact,
operational suitability and long-term viability. Environmental impact includes low-GWP refrigerants and energy effi ciency.
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Operational suitability matches capabilities to store size, climate and product mix. Long-term viability ensures readiness for FGAS phase-downs, carbon targets and possible restrictions on high-energy equipment. For many UK retailers, R290 heat pump systems off er an optimal balance of effi ciency, sustainability and familiarity, with safety protocols in place. In colder climates, CO₂ may outperform, especially when heating and cooling demands are both high. Traditional boilers are harder to justify as decarbonisation accelerates and older refrigerant systems face higher costs and tighter regulation. Decarbonising supermarkets is an ongoing process of assessment, adaptation and optimisation. Partnering with experienced HVACR and refrigeration specialists ensures systems are not only well specifi ed and installed but also monitored, integrated and fi ne-tuned for maximum benefi t. This approach allows supermarkets to fully leverage advances in refrigeration, coils, condensers, ventilation, ductwork, grilles and AHUs, while meeting environmental commitments and operational goals.
The coming decade will be decisive. Supermarkets that adopt low-GWP refrigerants, effi cient components, integrated systems and continuous optimisation will not only meet regulations but also lead in sustainable retail. With the right technology and commitment to ongoing improvement, the sector can reach net zero while enhancing comfort, protecting product quality and delivering long-term cost savings.
www.acr-news.com • October 2025 17
"Regular cleaning is vital, as dirt on components hinders heat transfer, forcing
compressors to run longer."
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