I’ve been looking into ways to boost energy efficiency in existing HVAC systems, especially when it comes to retrofitting older units. Has anyone had experience with using variable frequency drives on older chillers? I recently completed a project that reduced energy consumption by 30% using this approach, and I’m curious about others’ results?
Variable frequency drives can really change the game! I managed a similar upgrade last year, but found that balancing old ductwork is key for optimal performance. Have you considered any duct modifications? 
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It’s great to hear about your energy savings! One thing I found effective with older chiller systems is ensuring proper insulation on the refrigerant lines; it can significantly reduce losses. Have you also considered the impact of regular maintenance on efficiency?