Cooling - AC
In comparison to individual AC units centralised systems provide fresh air with higher efficiencies but often lose performance over time. Practice shows that centralised AC systems are rarely adjusted to real needs after initial factory settings or maintained properly over time. Outdated control settings, updated ventilation requirements, leakages in inner duct systems, blocked filters, worn fan belts or electric motors with low efficiency are areas to improve performance with little investments and short pay back periods.
High energy efficient split units are still not often installed as low investments overrule ongoing operation costs. Once installed it is therefore essential to train staff on temperature settings and to maintain hardware regularly. In hot climate zones it is important to reduce air leakages as building envelopes are not adjusted to improved energy efficiency. We often find that outdoor units are positioned in direct sunlight and that shading and appropriate natural ventilation improves their efficiency.
Cooling of food and beverages follows HACCP regulations and cooling temperatures are strictly monitored. However, improved energy efficiency can be achieved by positioning cooling units away from heat sources or direct sun light, use of efficient light systems inside cooling rooms, accurate sealing, regular cleaning of coils, de-icing, storage management and staff behaviour.